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.

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 Russian translation of the application is courtesy of Lirvux.

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
- Aurora Forecast
- 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
- Polar Finder
- Precession calculator
- Redshift calculator
- Satellites
- Saturn's Moons
- SI Units reference
- SIMBAD object search
- Sky Map
- SOHO realtime solar images
- Solar Calendar
- 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

2.4.4 - Added visual limiting magnitude calculator. Replaced date pickers. Fixed calculation bug on teelescope resolution calculation and CCD resolution calculation. Enhanced visibility of Polaris in Polar Finder
2.4.3 - Fixed occasional swipe error. Enhanced sky map tracking stability and speed.
2.4.2 - Added fullscreen and zoom to most images. Added polar finder screen.
2.4.1 - Added aurora forecast and solar calendar. Fixed manual tracking in sky map. Improved performance of sky map.

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

    by AJWenger1 on 19/09/2014

    App provides an incredible amount of data.

  • (70 stars)

    by Camping Genie on 19/09/2014

    Try searching for the international space station, hardly a difficult search item! I tried the full name, ISS, Zariya, all of them! Apparently it doesn't exist!

  • (70 stars)

    by Christopher Page on 18/09/2014

    Great stuff

  • (70 stars)

    by Hector Hernandez on 16/09/2014

    Very good app.

  • (70 stars)

    by Peter Anthony Smith on 16/09/2014


  • (70 stars)

    by John Baines on 16/09/2014

    Very nice app.

  • (70 stars)

    by Bob O'Connor on 16/09/2014

    TONS of information. Incredible. Must download if you're an amateur astronomer. Or even a professional!