The universe at your fingertips - for iOS, Android & Mac OSX
Simulate the sky from anywhere on Earth, up to 1000 years in the past or future. Animate transits, conjunctions, eclipses, and other events with time controls.
25,000,000+ stars, 740,000+ galaxies, and over 630,000+ solar system objects, including every comet and asteroid ever discovered.*
SkySafari can help you identify stars, planets and constellations by holding your up phone up to the sky - as you move the phone around, the sky chart follows your motion.
Hundreds of images from NASA space missions, the Hubble Space Telescope, and the world's foremost astrophotographers.
Computing the positions of solar system objects to sub-arcsecond precision with the latest JPL planetary ephemerides.
* Largest only available in SkySafari Pro
SkySafari 4 Pro includes over 27 million stars, 740,000 galaxies down to 18th magnitude, and 620,000 solar system objects - including every comet and asteroid ever discovered. Plus, state of the art mobile telescope control.
SkySafari 4 Plus shows you 2.6 million stars, and 31,000 deep sky objects - including the entire NGC/IC catalog, and 18,000 asteroids, comets, and satellites with updatable orbits. Plus, state of the art mobile telescope control.
SkySafari 4 shows you 119,000 stars, 220 of the best-known star clusters, nebulae, and galaxies in the sky - including all of the Solar System's major planets and moons, and more than 500 asteroids, comets, and satellites.
The best mobile astronomy app keeps getting better
Now, SkySafari 4 makes the best mobile astronomy app even better. We've reimagined its interface for iOS and Android, with fully redesigned telescope controls.
The star and solar system object databases have been rebuilt, with 80% more stars in the Pro version.
SkySafari 4 is a complete reinvention of the app that adds the features our users have asked for most often during the past two years. SkySafari 4 isn't just a makeover - it's an overhaul.
SkySafari 4 comes in three versions - Basic, Plus, and Pro. All three versions require iOS 7+ or Android version 2.2+
SkySafari 4 is also available for Mac OSX 10.6.8+ in the Mac App Store