dancindonna.info Question Papers CELESTRON SKY MAPS PDF

CELESTRON SKY MAPS PDF

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to navigate around the sky; you'll know how to use a telescope; and you'll have a strong understanding of the .. Celestron Cassegrain reflector, WikiCommons, Staycoolandbegood, .. All the constellations are like a map in the sky. Seasonal star charts display the locations of the best deep-sky objects . Celestron Sky Maps are made from /4” x /4” water-resistant. Instructions are included on the last two pages of the PDF file linked above. Once you These constellation patterns were adopted by Google Sky. The classic.


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Moon Map courtesy of Night Sky Magazine dancindonna.info . A stand-alone "star finder" is the new Celestron Sky Scout. Not only does it have a. The Evening Sky Map (PDF) is a 2-page monthly guide to the night sky suitable for all The Evening Sky Map is FREE for personal non-commercial use. The Celestron SkyMaster 15x70 binoculars are an excellent, low-cost choice for the. The stars on the map should match those in the sky. Navigating the Night Sky. Learn the sky by first finding those stars or constellations that you already know.

How to practice deep-sky? Torres In this section, I will give you an outlook regarding instruments and books for practicing Deep Sky. It is subjective and reflects just my experience, but perhaps it can help you to develop your own opinion about what you really need. Instruments I have owned different instruments along 25 years. My first instrument was an old 7x50 binoculars pair that my father gave me one summer.

I have to say that I do it frequently: less parafernalia, and more sky contact makes you more delighted. I also like very much observing with large binoculars.

Currently, these are a 25x Celestron SkyMaster pair with a parallel 9x50 finder small picture on the left. Formerly, it was a 20x80 Zeus binos pair. In combination with the LX, giant binos makes the starhopping process easier, and in addition, the binoculars provide a second perspective in the observed object very worthy.

However, too much parafernalia makes one reluctant to observe. For this reason, I tried to reduce the equipment. For field work I considered essential a set of two reference books picture on the right and the minimal accessories. The books include photocopies of the original sources, so moisture and deterioration are not so problematic. The field atlases are also photocopies stored into plastic folders see below.

Anyway, loading the car makes one always lazy. So except in situations where you are spending two or more nights, think twice before loading your car with tons of material that likely you will not use. Less equipment fully enjoyed will let in you better memories.

Sky pdf celestron maps

Good sky maps are essential. It consists of 12, maps see the pictures. Frequently you need to know exactly where the fuzzy you are chasing lies to perceive it.

Thus, I usually choose the HB-C left to navigate to the place where my target is located. Then, if necessary, I switch to my map collection left and below to boost the detail and to spot the object.

The HB-C provides panoramic views, and usually plots at least a 9 magnitude star near the object, that can be seen in the corresponding one-degree circle. This is essential: a smaller atlas, such as Sky Atlas , does not guarantee plotting at least one star close enough to the object, and makes more difficult the identification. I have tried the collection for half a year and I can affirm that is the best star atlas I have tried ever.

For getting truly functional maps, I prepared an index section listing the objects first by constellation, then by RA, and then by DEC, that allow locating any object in a few seconds. Each A4 page in the collection contains 54 maps gathered in blocks of six maps each right picture , and printed at dpi.

The main folder contains a selection of the 6, best DSO, and the second, an extension for faint galaxies, galaxy clusters and objects that did not pass the filtering conditions. As you can see, any of the 12, objects is presented with its basic data and a field of 1 degree centered on it.

Just take the atlas you prefer and compare the details. I am now working in a program to plot high resolution maps. Moreover, I am considering in the near future a project of developing a new printed atlas, more powerful than the Millennium Atlas. Do you want this atlas for you? I have prepared a PDF document with the first maps. It is free, follow this link.

ASSA Bloemfontein: Tools for the Observer

These considerations led me to the idea of seeking something similar to a giant binocular, but with larger magnification. Could a large spotting scope be useful in deep sky? Finally, I found something that fits in this idea.

It is a large spotting scope, which combines a 2. Both objectives can be interchanged by flipping a mirror. The light path is folded, so the instrument is surprisingly compact and light. In order to make this telescope more functional, I coupled a 9x50 finder and a Manfrotto three-axis system on the geared head to make starhopping faster though keeping accuracy. The picture on the left shows the appearance of all the components assembled.

Zooming the image reveals a lot of detail, and objects that are totally faded at less magnification become visible. It is amazing to see how magnification brings to visibility objects totally imperceptible at x Obviously, the optical quality is not as good as in a true astronomical refractor, but anyway it is much better than that of giant binoculars.

This is an instrument for deep-sky objects, not for planets. If you are viewing Tonight's Best list during daylight hours, many objects toward the end of the list may not have risen yet, and so are dimmed in the list. Similarly, if you are viewing Tonight's Best list in the early hours before dawn, objects near the start of the list may have already set, and so are also dimmed.

You can tap this button to convert your list of search results, or the common object list, or the Tonight's Best list, into a custom observing list. Custom observing lists keep track of objects you want to observe, and record logs of your observations. By default, SkySafari comes with a single, empty observing list called "My Favorites". To create additional lists, tap the Create New Observing List button at the bottom of the Search view. For more information on observing lists, see the Observing Lists Help section.

You can rearrange and delete observing lists. Here's how. On iOS, tap the Edit button at the top of the screen. Then tap and drag the "grip" icon on the right side of the list to move it around the screen.

Tap and drag the - minus icon on the left side of the list to delete it. Tap the End Edit button at the top of the screen when you're finished. On Android, tap the Edit link at the top of the screen. Then tap the observing list you want to move or delete.

When finished, tap the End Edit link at the top of the screen. To move or delete items inside an observing list, use the same techniques after you've tapped on an individual list to view the items within it. You can do this both with common object lists, and custom observing lists. To change the way a list is sorted, first tap the Settings at the top of the list. Then choose the value to sort the objects by.

You can highlight objects in a list, to show their distribution in the sky. To highlight a list of objects, first tap the Settings at the top of the list. Then turn on the Highlight Objects switch at the top of the settings.

Objects in that list will then be highlighted with blue circles in the sky chart. The objects will be highlighted even if they are fainter than the sky chart's current magnitude limit, so you can easily find them. Only one object list can be highlighted at a time. If you turn on the Highlight Objects switch for one list, SkySafari will turn it off for all other object lists.

When the Highlight Objects switch is turned on, a small list icon appears in the sky chart, right above the middle of the toolbar. Tapping this icon gives you the following choices: Show List: Returns you to the currently-highlighted object list, right at the point you last viewed the list. Unhighlight List: Turns off the list highlighting.

Select Next Object: Selects and pans to the next object in the list following the currently selected object. Surprise Me: Selects and pans to a random object in the list that is currently above the horizon. It also contains English-language description and images of several hundred of the brightest and best-known objects in the sky.

Swipe the Object Info view left to see the description; swipe right to return to the object data.

Skywatching

On iPads and other tablets, images are displayed in-line with object descriptions. On phones or other devices with smaller screens, you can tap on image links embedded in the descriptions to show full-screen images. Buttons at the bottom of the view let you center the object in the sky chart, slew or align your telescope to the object, or - in SkySafari Plus and Pro - go into orbit around the object! Object Data The exact information displayed depends upon the type of object you have selected e.

At a minimum, SkySafari displays the following information for the object you selected: Names - the object's proper name, and any alternate names by which it is commonly known. Catalog Numbers - the object's numerical designation s in the catalogs of stars and deep sky objects most commonly used by astronomers.

The object's best-known catalog numbers are listed first. Description - the type of the object, and the constellation that it appears in. Apparent Size or Separation- how large the object appears in the sky, or the component separation for double stars; measured in arcminutes ' or arcseconds ".

The full moon appears about 30 arcminutes across. Double stars are typically separated by a few arcseconds. Visual Magnitude - how bright the object appears in the sky; smaller numbers imply a brighter object. Sirius, the brightest star in the sky, is magnitude Distance - the distance to the object, if it is known.

For solar system objects, the distance is displayed in miles, kilometers, or Astronomical Units; 1 AU is the distance from the Earth to the Sun, or about For stars and deep sky objects, the distance is given in light years or parsecs.

One light year, the distance light travels in a year, is about 63, AU. One parsec is the distance from which the Earth's orbit appears 1 arcsecond in radius, and equals about 3.

RA and Dec - the object's Right Ascension and Declination describe its position in the Equatorial coordinate system used with printed star atlases. The Equatorial coordinate system rotates with the Earth, so the object's RA and Dec do not change unless the object itself is moving!

Azimuth and Altitude - the object's coordinates in the local Horizon coordinate system describe its current position in the sky. As the Earth turns, the object appears to move across the sky, so these coordinates change even if the object itself is not moving. Rise and Set Times - when the object appears on the horizon for the current local day.

Depending on your current latitude, and the object's declination, the object may not set e. Polaris seen from the northern hemisphere ; or it may not rise e. Transit Time - if the object is visible from your location on the current date, the transit time is when the object crosses the meridian and appears highest in the sky.

Angular Separation - SkySafari Plus and Pro show the object's angular separation and position angle from the Sun, from the last object you selected, and from the chart center. In SkySafari Plus and Pro, when you're in orbit around another solar system object, the Object Info view provides all information about an object as it is seen from your perspective in orbit.

For example, it gives the constellation in which the object appears, and the object's visual magnitude and distance, as seen from your simulated location in space - not as seen from Earth. Events with a specific time have a small clock icon on the right.

Tapping the clock will take you to that time and center the selected object, allow you to see the simulated event in the sky chart. Other Controls Along the bottom of the Object Info view are other buttons which let you center the object in the sky chart, go into orbit around it, slew your telescope to the object, or align the scope on the object.

Center - this button centers the object in the sky chart. See the Center button Help for more information. Instead, an arrow appears, leading you toward the selected object. Move your phone in the direction of the arrow to center the object in the field of view. When the object is centered, the arrow disappears, and your phone will be pointing toward the object's position in the sky. Orbit - this button lets you leave Earth and orbit the object, if it's a solar system object. See the Orbit button Help for more information.

These let you slew GoTo the object with your telescope, or to Align your telescope on the object. See the Scope Control view for more information about this.

This Month's Star Chart

Observe - Tap this button to add the object to an observing list, log a new observation of the object, view all your logged observations of the object or to download a Deep Sky Survey DSS image of the object.

If you are adding an object to an observing list you only have one list, the object will be added to that list.

If you have more than one list, SkySafari will let you choose which list you want to add the object to. See the Observing Lists Help for more information. Galaxy View helps you visualize the 3-D location of stars and deep sky objects.

The face-on image is an artist's rendition based on recent data from the Spitzer Space Telescope looking down from above the north galactic pole Objects in the left, face-on view are always drawn overlaid on the galactic disk so they will be visible.

This does not imply the object is actually in the northern galactic hemisphere. You should consult the right, edge-on view to see which hemisphere the object is actually in. You can also show the Galaxy view from the highlighted list's icon along the bottom of the chart. In this case, all objects in the highlighted list are show in the view.

In either case, if an object is outside the current field of view, a blue line is drawn in the direction it will be found. Share: Takes a snapshot of the view that may then be shared with others through Email, Facebook, iCloud Photo Sharing, etc. Auto Zoom: If the selected object is outside the viewable area, this will will zoom out to make the object visible. If the selected object is very close to the Sun at the current zoom level, the command will zoom in to display the object better in relation to the Sun.

Show Constellation Sectors: Divides the Milky Way galaxy in the neighborhood of the Sun into sectors, where each sector corresponds to the Milky Way constellation you would see when looking in that direction. Showing the constellation sectors allows you to better understand which part of the Milky Way galaxy you are looking at when observing within a particular Milky Way constellation.

This spiral arm is appropriately called the Sagittarius Arm. This is looking in the direction toward which the Galaxy is rotating.

When viewing the Milky Way in Auriga and Orion you are looking directly away from the galactic center, back through our own spiral arm. Reset: Resets the view to a zoom level where the whole Galaxy is visible. Center The Center button centers the selected object in the sky chart. Use this button if the selected object has moved off screen, and you want to re-center it in the field of view.

The selected object will stay centered if you zoom in or out, or animate the sky chart using the Time Flow controls. If turned off, the chart jumps instantly to objects when you center them. Time Flow The Time button in the main Sky Chart toolbar displays a set controls which let you flow the date and time dynamically, or adjust it step-by-step. Tap the Time button to show these controls; tap it again to hide them.

When visible, the time flow controls contain the following items: Current Time Label: The chart's current date and time is shown at the top of the panel. If there is an underlined segment, this indicates the time unit that will be used for flowing or stepping time e.

Tap the rightmost arrow to start the flow of time continuously forward; tap the leftmost arrow to flow time continuously backward. Tap either of these arrows to stop the flow of time.

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Time Step Arrows: The central arrows adjust the time by a single step, equal to the time unit you have selected underneath. For example, if you selected 1 day as the time unit, tapping the center right arrow will move the time forward by 1 day - but it will not continuously run the time by one day.

Now Button: Stops the flow of time, and returns to the current date and time indicated by your device's internal clock. Time Units Button: The button in the lower left shows the time unit you will change time by when stepping or flowing time.

Tapping the button brings up a panel where you can change the time unit. The unit can also be quickly changed by tapping the corresponding part of the time label at the top of the panel.

For example you would tap the day part of the time and date to change the unit to days. In SkySafari Plus and Pro, the number in the time unit button is a multiplier applied to the time unit. You can tap the button to enter a new multiplier with the numeric keypad - for example: 10 minutes, 7 days, seconds one sidereal day , or Please Note: in the basic version of SkySafari, you can only use time steps of exactly one minute, one day, etc.

You'll find that different astronomical phenomena are best simulated using different time units. For example: Second - best for showing the motion of fast-moving satellites. Minute - best at showing the daily rise-and-set motion of the Sun, Moon, and Stars.

Hour - best for showing the motion of Jupiter and Saturn's moons. Day - best for showing the motion of the planets against the background stars, as they and we! Year - best for showing the orbital motion of binary star systems like Sirius and Alpha Centauri. Time flow is temporarily paused when another view like Search, Object Info, or Settings is present. You can also use the Settings to change the simulated date and time.

If you are using SkySafari to control a telescope, we do not recommend using Time Flow while the telescope is connected - simulating a view other than the current date and time may result in pointing the telescope at the wrong place in the sky!

PDF Star Charts

Before connecting, select your telescope type and communication options in the Settings, under Scope Setup. By default, SkySafari's uses a "Demo" telescope. This is a dummy virtual telescope that lets you to use the controls without having a real scope connected. To connect to a real telescope, choose the telescope type and communication parameters in the Settings.

Please note: you can't use SkySafari's telescope controls when you are orbiting another object in the solar system. To use them, first return home to Earth. Connecting and Disconnecting After setting up your telescope in the Settings, tap the Scope button in the toolbar to show the Scope Control view at the bottom of the screen. The Scope Control view contains a button which lets you connect or disconnect from the scope. Connect: This button opens a connection to your telescope.

If you are using an Android device with a paired bluetooth serial adapter, then SkySafari will use bluetooth for telescope communication. Otherwise, SkySafari will use Wi-Fi for wireless telescope communication.

Tapping it will connect and then guide you though an alignment process. Once you've connected, this button's title will change to Disconnect. Tapping it will end your telescope control session. Before tapping the Connect button, make sure you've selected the correct telescope type and communication options in the Settings. Make sure the scope is powered on, and any necessary alignment procedures are completed.

Consult your telescope manual for details on the scope's alignment procedure. After connecting, the sky chart is centered where SkySafari thinks the scope is pointing, as reported by your telescope. If this is wrong, your telescope is probably not star-aligned correctly. While you're connected to a telescope, the Compass or Gyro button in the toolbar will be turned off.

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The sky chart cannot be centered on the telescope, and centered on the compass, at the same time. Slewing and Aligning Once your telescope is connected, arrow buttons appear on the sides of the screen. The status bar expands to show the scope's coordinates and target object. The arrow buttons let you move the scope directionally.

A motion rate slider appears, to ket you control how fast the directional motion occurs. To select an object in the sky chart, tap on it, or use the Search view. While a GoTo is in progress, this button's title changes to "Stop", and pressing it will issue a command to stop the currently-in-progress GoTo.

You can use this as an "emergency stop" if the telescope is in danger of hitting something, or if you have accidentally slewed to the wrong object.

Note that not all telescopes support GoTo commands, and that you cannot GoTo an object which is below the horizon. Align: This synchronizes the scope to coordinates of the selected object.

The bullseye indicator in the sky chart shows where the telescope thinks it is pointing. If that appears incorrect, the scope and the software must be synchronized.

To do this: Physically point the scope at a real star in the sky, using SkySafari's arrow buttons or the scope control panel. Center the object in the eyepiece. Select that same object in SkySafari to make it the current target object.

Do this by tapping the object in the sky chart, or by searching for it by name. Tap the Align button. Moving the telescope will cause the sky chart to move, following the telescope's motion. It subtracts that offset from the telescope's reported position whenever the telescope is within 10 degrees of the object you Aligned on.

In other words, SkySafari performs a "local sync" around the alignment target. If you move the telescope to a very different part of the sky, you may want to Align on a target in that part of the sky. This eliminates the need to level your telescope mount base. Simply set up your telescope, point it at the first alignment star, select that star in SkySafari, and tap "Align". Repeat the process with a second alignment star, choosing "Align" rather than "Restart Alignment" when asked.

Your encoders should now be aligned to the sky. You can continue to align on additional second stars; but SkySafari only uses the two you most recently aligned on. If you want to forget the pervious alignment stars and align as your first star, choose "Restart Alignment". Make sure your two alignment stars are at least 10 degrees apart; 90 degrees apart is ideal. SkySafari will warn you if your alignment stars are too close together, or if their positions don't match - for example, if you've accidentally selected the wrong alignment star in SkySafari, or you're not really pointing the telescope at that star in the sky.

SkySafari remembers the telescope's alignment until you quit the app, so you should not have to realign if you disconnect or are accidentally disconnected from the encoder control box. However, if you accidentally kick the telescope mount, or otherwise destroy your alignment, you can realign without having to quit SkySafari. To start over, point the telescope at a star, select the same star in SkySafari, and tap Align. When given the option, align on the star as the "First Star".

That will reset SkySafari's alignment process and start it over with the star you just selected. S for Dec. Orbit The Orbit button lets you leave Earth behind, and orbit the Sun, other Solar System objects, and even nearby stars.

In the basic version of SkySafari for iOS, you can unlock the Orbit feature with a one-time in-app purchase. Entering Orbit and Returning to Earth To orbit a solar system object or another star, first select one by tapping on it in the sky chart, or by searching for one with the Search view. Then tap the Orbit button. In a few seconds, you'll fly through millions of miles of space into orbit near the object you selected.

If you select the Sun and then tap the Orbit button, you'll fly to a location Astronomical Units above the Sun, where you can see the entire solar system as a whole. From there, you can select any other solar system object and fly into orbit around it. When you want to go home to Earth, tap the small Earth icon at the bottom of the sky chart. SkySafari will fly you back to same Earthly location you left earlier. Navigating in Orbit When you're orbiting a solar system object or nearby star, that object stays locked at the center of the sky chart.

Swiping the chart moves you around the object. Two new buttons at the bottom of the sky chart let you fly toward or away from the object you're orbiting. The status bar above the sky chart indicates your distance from the object. You can magnify the field of view by pinching and zooming, just as you can when viewing from Earth.

Zooming will not move you toward or away from the object you're orbiting; it simply changes the sky chart's field of view. A planet can appear very large in the sky chart because you're far away from it but highly zoomed in, or because you're zoomed out but very close to the planet. Usually the distinction is obvious, but this is one thing to note in case you become confused. While you're orbiting another star or solar system object, you can center the sky chart on a different object by tapping it and tapping the "Center" button, or by searching for it and tapping the "Center" button in the Object Info window.

If you do this, swiping the chart will no longer move you around the object you're orbiting; it will simply pan the field of view. To resume orbiting the object, tap it to select it again, then tap either the "Center" or "Orbit" button. Using SkySafari in Orbit When you're orbiting another star or solar system object, certain SkySafari features are not available.

For example, you cannot use the compass or gyroscope, and you cannot use any telescope control features. These features are only designed to work when you're observing from the Earth's surface!

SkySafari also adjusts some display settings when you leave Earth and enter "orbit mode". For example, planet and moon orbits are automatically displayed, and constellation lines are hidden. The maximum field of view width is restricted to 90 degrees. SkySafari does these things to provide a clearer display. When you return home to Earth, your previous display settings are restored.

When you're in orbit around another star or solar system object, the Object Info view provides all information about an object as it is seen from your perspective in orbit. When you are orbiting another star, SkySafari only displays stars in the Hipparcos catalog, and nearby stars whose distances are well known. SkySafari does not display faint Tycho or Guide Star Catalog stars, because their positions in three-dimensional space are unknown.

Therefore their apparent positions when seen from outside our Solar System cannot be accurately depicted. If turned off, you will jump instantly into orbit around objects when tapping the Orbit button instead of experiencing a few seconds of animated "flight". As you move the phone around, the view on the sky chart follows your motion.

You can identify stars and planets by holding your phone up next to them, and you can find any object in the sky by following an arrow that points in its direction.

Please note: some devices, like the iPod Touch and Kindle Fire, have a gyroscope but no compass. The toolbar icon for Compass will say Gyro instead. You can activate the compass or gyro as follows: Tilt your device upward. Tap the Compass icon in the toolbar.

On a device with gyro but no compass, tap the Gyro button in the toolbar to activate the gyro. Tap the Compass or Gyro button again, or touch any part of the sky chart, to turn the compass or gyroscope off. You can turn off "Tilt to Use" if you find that you're accidentally activating the compass too often, or if you prefer to activate it from the main toolbar.

Please note: in SkySafari Plus and Pro, the compass and gyroscope cannot be used when you are orbiting another object in the solar system.

You can only use the compass when you are viewing from Earth. Using the Compass SkySafari uses the compass to center the sky chart on the direction you're holding your phone. You can also use it to find objects in the sky. To do this, first turn on the compass.

Then tap Search, and enter the name of the object you're looking for. When the Object Info view appears, tap the Locate button at the bottom of view. An arrow appears, leading you toward your selected object. Follow the arrow with your phone to center the object on the screen. In SkySafari Plus and Pro, the compass and altimeter will be turned off if you connect to a telescope, or lock on the telescope's position in the sky chart. The sky chart cannot be centered on the telescope's position, and centered on the coordinates reported by the compass, at the same time.

A note on accuracy: the solid-state compass built into most mobile devices is not very accurate, and easily affected by interference. It can easily be wrong by ten degrees or more.

The compass may be useful for locating bright objects in a general part of the sky, but it's certainly not accurate enough to point a telescope. So to find your way around the sky with the gyroscope, you'll need to use a slightly different process. First, locate a known reference object in the sky, like the Moon. Then search for the same object in SkySafari, and center it on the screen.

With the object centered, hold your device toward the object in the sky. Then tap the gyro button with a finger in your other hand! Now, as you move your device around, the gyroscope follows its orientation relative to the object you used as a starting point. As you move the device around, the sky chart on the screen follows to match the view in the sky behind it. As with the compass, you can use the gyroscope to find an object in the sky. Start with a known object in the sky, then find and center the same known object in SkySafari's sky chart, and turn on the gyroscope - just as described above.

Then search for the unknown object you're trying to find in SkySafari. When the Object Info view appears for that object, tap the Center button. SkySafari show an arrow that leads toward the object; follow the arrow with your phone to find the object in the sky.

Night Vision The Night button changes SkySafari's appearance to a red-on-black theme designed to help preserve your night vision. Night Vision is best used in the dark, out under the stars. Tap this button once to switch to the Night Vision theme; tap again to restore SkySafari to its previous appearance.

For many people, the screen is still too bright to effectively preserve their night vision - even when SkySafari is using its Night Vision theme.

However, this setting only works within SkySafari. To turn down the screen brightness for all apps on your devices, use the screen brightness slider in the main Settings app on your device. An even better solution is to place a piece of red film over the screen.

A brand called Rubylith works particularly well. A "hardware" approach to preserving your night vision works better than any software solution because it will enforce a red appearance across all applications, not just SkySafari. SkyWeek describes all major sky events: eclipses, conjunctions, good meteor showers - miss nothing! Whether you're a newbie skywatcher or an experienced amateur astronomer, SkyWeek will become your handy, everyday guide to what's up.

Tap the SkyWeek icon in SkySafari's toolbar to view a page listing the week's current events. Tap the VIEW icon next to a particular event to view a custom sky map which illustrates the event. Sky maps that are automatically set for your location. And starting from the sky scene that's displayed, you can pan around the heavens, change the scene to other times and dates, and zoom in or out.

SkyWeek's daily event listing also includes links to more info. It shows important information for the Sun, Moon, planets and selected satellites. Tapping an entry will take you to the Object Info for that object so you can learn more about it.

The constellation and distance information refers to where the object is "right now" relative to your current location. For the Sun, Moon and planets, the rise and set times are calculated for the current day. For example Sun rise time is when it rose, or will rise today, not necessarily for the next Sun rise. For satellites, the rise and set times refer to the next visible pass of the satellite. An Iridium flare happens when the satellite's reflective antennae act like a signal mirror and reflect the Sun's light down to your specific location.

If you are watching the satellite when it flares you will see it suddenly increase in brightness. By tapping the Iridium satellite's entry you can go to the Object Info and see the exact altitude and azimuth where the flare will happen in the sky.

When set to current time, the chart view will update every second to show the current positions of objects in the sky. Use Current Time keeps SkySafari's simulated time in sync with your mobile device's built-in system clock.

When turned on, the sky chart updates to match real time every second. Setting the Date To change the simulated date: iOS users touch the Date tab at the top of the screen, then rotate the picker wheels to the desired date.

Android users tap the Set Date button to select a new date. When the switch is on, SkySafari automatically determines whether DST is currently in effect based upon the date and your simulated location. SkySafari displays a message below the switch, telling you whether it thinks DST is currently in effect for your simulated date and location.

Governments often change the rules for daylight saving time, so SkySafari's automatic DST option may not work. Setting the Time To change the simulated time: iOS users touch the Time tab at the top of the screen, then rotate the picker wheels to the desired time. Android users tap the Set Time button to select a new time.

There are buttons below the picker to allow you to quickly set the time to specific events such as Sunset, Moonset, etc. The exact time of these events will differ based on your location and the simulated date. Select the Advanced tab to see some new options which let you avoid With the Advanced tab, you can enter a date up to 10, years from the present in SkySafari Plus, and up to , years from the present in SkySafari Pro. You can also enter the time to the nearest second.

Julian Date is another method to set the date. Widely used in astronomy, the Julian Date is the number of days since January 1, B. The Julian Date begins at Greenwich noon, not midnight. Midnight i. Julian dates do not observe any time zones or daylight saving time changes. Local Sidereal Time is displayed near the bottom of the Date settings view.

This indicates the hour of right ascension that is currently on your local meridian, and is sometimes used for aligning a telescope. Location SkySafari needs to know your location on Earth in order to correctly plot the location of objects in the sky.

You can set this in the Location view from the main Settings screen.

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Four pieces of information are necessary: Latitude - distance north or south of the equator Longitude - distance east or west of the prime meridian Elevation - altitude above sea level Time Zone - local time offset in hours from Universal Time UT , previously called Greenwich Mean Time GMT A time zone west of behind Universal Time is negative; time zones east ahead of UT are positive.

Always enter the time zone offset for Standard Time only. Don't enter a Daylight Saving Time offset here. SkySafari will automatically correct for Daylight Saving Time. Please note: in SkySafari Plus and Pro, you cannot change your location settings while you are orbiting another object in the solar system. These settings only refer to your location on Earth. To change them, you first need to return home to Earth. When the location information is obtained this way, your location name is automatically filled in as "Current Location".

Choose Location From Map If your mobile device is connected to the internet, you can use Apple or Google maps to choose a new location. This is useful if you want to see the sky from a place other than where you are located right now. You could use this feature to view the sky as it will appear from a distant city or island where you're planning to take a vacation. After you tap this option, a map view will appear, centered on your current location.

You can pinch or swipe this map to zoom or move around, just as you would with the built-in Maps app on your device. Tap and hold to drop a pin on your desired location. Then tap Done at the top of the screen.

SkySafari will use the longitude, latitude, and location name where your pin dropped. SkySafari will make a best guess about the elevation and time zone, since this information is not available from Apple or Google Maps. Choose Location From List If your mobile device is not connected to the internet, and GPS or Wi-Fi-based location services are not available, you can choose a location from a searchable list of thousands of cities in SkySafari's database.

Tap "Choose from List" to see a list of locations, sorted by country. Choose a country to see a list of cities in that country. Choosing a city will automatically fill in the data for you. You can also search for any location in SkySafari's database by entering its name in the search field above the list of countries.

If SkySafari finds more than one location which matches the name you entered, it will list all matching locations, and you can choose the one you want. If there is only one matching location, SkySafari will use it. The location database in SkySafari's basic version includes every city worldwide with more than , inhabitants - a total of over 4, cities.

In SkySafari Plus and Pro, the location database includes all cities with more than 10, people, plus more than observatories, star parties, NASA centers, and other "astronomical" locations - a grand total of over 30, locations in all!

To retrieve a user-defined location, tap the "Choose Location from List" button, then choose the "User-Defined Locations" group. You must name your location something other than "Current Location" before saving it as user-defined. If you choose the same name as an existing user-defined location, that existing location will be overwritten with the new longitude, latitude, etc.

You can delete user-defined locations as follows: Tap the "Choose Location from List" button. Choose the "User Defined Locations" group at the end of the location groups list.

Tap the "Edit" button at the top of the user-defined locations list. Tap the small, red, round, "-" button for each user-defined location you wish to delete.