Night Sky Tools - Astronomy

Night Sky Tools - Astronomy

100,000 - 500,000 downloads

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This app is a collection of astronomical tools and charts perfect for anyone interested in astronomy. The calculations are of a high enough accuracy for almost all amateur astronomy applications.

*** Because of the huge backlash to the change in ad provider, I have removed all ads from the app, so there will no longer be exit or banner ads.

Due to the fact that astronomy is often best when far from civilization where mobile signal may not always be reliable. Therefore, this app is (almost) completely self-contained and does not require any internet connection for most of the information available. The only exceptions to this are the SOHO solar images and NGC/IC, Messier, Caldwell and Binary star images and weather forecast which are loaded dynamically, as well as the refreshing of satellite, comet and near-earth asteroid data.

The Sky Map makes use of the direction sensors of the device to show the sky above (or below you). Most of the features can be toggled in the settings. The Sky Map also allows you to turn on the device's camera to see the view behind the device with the sky map superimposed over it.

The direction sensors of the device may need to be calibrated if the map appears to be pointing in the wrong direction. To calibrate the device's sensors wave the device in a figure-8 pattern. If the direction is still off, then the direction calibration can be adjusted manually by changing the setting in the Settings screen.

The observation log, allows you to save observations in the applications, as well as manage a list of astronomical equipment and observing locations. This equipment is also available for use in the Telescope Calculator.

Night mode turns the display red for night observations without having to ruin your night vision.

Most of the data screens have an option to share the data via email, or other similar apps able to accept HTML content.

When using Android 4.0+, the Upcoming Events is able to add events to the device's calendar by using a long click.

The Astronomical Time is also available as a Home screen widget. To use the widget, the app needs to be installed onto the internal storage instead of the SD card, otherwise it will not be available.

Android 2.2+ is now supported, but Android 4.0+ to get the full user experience.

The list of tools in the app are as follows:
- Upcoming astronomical events
- What's up now
- What's up tonight
- Angular separation calculator
- Astronomical constants and symbols
- Astronomical time
- Astronomy glossary
- Astrophotograhy: Exposure time
- Astrophotograhy: CCD resolution
- Astrophotograhy: Optimal f-ratio
- Astrophotograhy: Max untracked exposure time
- Atmospheric refraction calculator
- Binary stars lookup
- Bright stars list
- Caldwell catalog
- Comet lookup
- Compass
- Conjunctions and oppositions of the planets
- Constellations
- Coordinate convertor
- Daylight map
- Eclipses
- Equinoxes
- Ephemerides of the Sun, Moon, planets and dwarf planets
- Exoplanets
- Greek Alphabet reference
- Hertzsprung-Russell diagram
- Jupiter's moons
- Magnitude calculator
- Messier catalog
- Meteor Showers
- Moon calendar
- Near-Earth asteroid lookup
- NGC/IC catalog lookup
- Observation log
- Planetary orbit animation
- Planisphere
- Precession calculator
- Redshift calculator
- Satellites
- Saturn's Moons
- SI Units reference
- SIMBAD object search
- Sky Map
- SOHO realtime solar images
- Stellar classification
- Telescope airy disc calculator
- Telescope f-ratio calculator
- Telescope magnification calculator
- Transiting exoplanets
- Variable stars lookup
- Weather forecast

Tags: night sky tool.

Recently changed in this version

2.3.1 - Removed all ads.
2.3.0 - Changed ad provider. Ads now only show when exiting the app. Fixed bug in comet orbital calculations.
2.2.8 - Fixed new background colour bug in Sky Map. Added pinch to zoom in HR diagram
2.2.7 - Added Hertzsprung-Russell diagram. Added camera background to sky map sowing the view behind device. Fixed initial loading of sky map when using manual tracking.
2.2.6 - Fixed error with negative ecliptic latitudes
2.2.5 - Fixed minor bugs in eclipses and Whats Up

Comments and ratings for Night Sky Tools - Astronomy
  • (69 stars)

    by Rex Winch on 22/07/2014

    Sky Map is innacurate.

  • (69 stars)

    by Rainy Moitlhobogi on 22/07/2014

    Very informative

  • (69 stars)

    by Elena Rybakova on 15/07/2014

    Samsung Galaxy Tab 4 8" Android 4.4.2. Compass, sky frozen and not moving

  • (69 stars)

    by Mohamed Ali on 14/07/2014

    It has a ton of features and info. Great effort and the best thing is that it's free.

  • (69 stars)

    by Melanie Fazzio on 11/07/2014

    I now use this app to set up my Celestron telescopes goto program. It is beyond the most accurate I have found to date!! Telescope now takes less than 5 minutes to accurately set up with no flaws whatsoever!!! BEYOND AWESOME!! Thank you!

  • (69 stars)

    by Jan Reidmiller on 10/07/2014

    The latest update changed the banner ads to pop-ups. They're much too intrusive; I'm uninstalling Night Sky Tools!

  • (69 stars)

    by Scott Bauman on 10/07/2014

    The add page just sucks uninstalling. Will check back later to see if the big bright adds are gone.