Stellarium alternatives: 2 apps ranked by verified data

Facts checked Nov 1, 2026AppBreakup editorialHow we rank

Common reasons people leave Stellarium: desktop app needs a 3D-capable graphics card, and ground-based view only, unlike Celestia's free space travel. We ranked 2 alternatives by how directly each one replaces Stellarium, then by reviews, real visits and how recently each app's facts were checked against its own website. Celestia currently ranks first.

Quick comparison

#	App	Pricing	Open source	Platforms	Verified facts	Score
1	Celestia	Open source	Yes	Windows, macOS, Linux +2	4 of 4	62.6

1. CelestiaTop pick
Best for: Space enthusiasts and teachers who want to explore the universe in 3D rather than chart the night sky
Open sourceWindows, macOS, Linux, iOS, Android
62.6
score / 100
Why switch from Stellarium
Free 3D space simulator that lets you leave Earth and fly to planets, stars and galaxies.
Pros
Free travel anywhere from planets to other galaxies
Large library of community add-ons
Free and open source on desktop and mobile
Cons
Few tools for planning real observing sessions
Add-on installation is manual and dated
Slower release cadence than Stellarium or KStars
Visit Celestia Details and reviews
How this score is calculated
Editorial fit ×0.387
Reviews ×0.363
Clicks (90 days) ×0.150
Freshness ×0.1585
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is Celestia a good Stellarium alternative?
Verified facts
4 of 4 verified
License
GPL-2.0
Checked Nov 1, 2026github.com(opens source in a new tab)
Platforms
Windows, Linux, macOS, iOS, Android
Checked Nov 1, 2026celestiaproject.space(opens source in a new tab)
Star catalogue
100,000+ stars
Checked Nov 1, 2026celestiaproject.space(opens source in a new tab)
Mac App Store
Celestia 1.7.0
Checked Nov 1, 2026celestiaproject.space(opens source in a new tab)