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SkySafari 4 Version Comparison for Mac OS X

Please Note: SkySafari is now owned and supported by Simulation Curriculum Corporation. This page contains legacy information for owners of older versions of the app. For the latest information on SkySafari for Mac OS X, go to

Southern Stars offers three versions of SkySafari for Mac OS X. They differ in the size of their database and in their selection of features. All three versions require Mac OS X 10.6 or later, and a minimum screen resolution of 1280 x 720 pixels.

The table below lists the main differences between the three versions of SkySafari 4 for Mac OS X:

App Version

SkySafari 4

SkySafari 4 Plus

SkySafari 4 Pro

Available From Mac App Store Mac App Store Mac App Store
App Icon
App Size 122 MB 298 MB 1.09 GB
Regular Price (USD) $9.99 $29.99 $59.99

Database and Computation

Number of Stars 119,940 2,637,791 27,074,634
Star Magnitude Limit ~8.0 ~12.0 ~15.0
Number of Deep Sky Objects 222 31,586 743,500
Deep Sky Magnitude Limit ~10.0 ~15.0 ~18.0
Number of Planets & Moons 34 38 187
Number of Asteroids 121 15,832 627,931
Number of Comets 251 632 3,241
Number of Satellites 205 1,460 1,460
Planetary Position Accuracy 10" - 1' < 0.1" < 0.1"
Number of Horizon Panoramas 3 6 10
Number of Object Descriptions 626 1,476 1,629
Number of Object Images 473 592 865
High Resolution (1024 x 768) Object Images No No Yes
Complete General Catalog of Variable Stars No No Yes
Complete Washington Double Star Catalog No No Yes

Features, Graphics, and Interface

Night Vision mode Yes Yes Yes
Wired & Wireless Telescope Control No Yes Yes
Telescope Equipment Settings No Yes Yes
Creates Custom Observing Lists No Yes Yes
Orbit Solar System Objects No Yes Yes
Orbit Nearby Stars No Yes Yes
Hi-Res Earth, Moon, Mars maps No Yes Yes
Super Hi-Res Moon map No No Yes
Planet & Moon Surface Feature Labels No Yes Yes
Saves, Restores, and E-Mails Settings Yes Yes Yes
Updates Solar System Orbit Data Yes Yes Yes
Alt-Azimuth ("Local Horizon") Sky Charts Yes Yes Yes
Equatorial ("Star Atlas") Sky Charts No Yes Yes
Ecliptic ("Solar System") Sky Charts No Yes Yes
Galactic ("Milky Way") Sky Charts No No Yes
Coordinate Grids and Reference Lines No Yes Yes
Computation Precision & Precession Settings No Yes Yes
Date, Time, & Coordinate Format Settings No Yes Yes
Computes Conjunctions, Oppositions, Eclipses, Transits Yes Yes Yes
Computes Objects' Angular Separations No Yes Yes