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Stellarium vs astroterm: catalog facts
Stellarium	astroterm
Free Free and open source under the GPL 2.0, funded by donations and sponsorship.	Free Free and open source under the MIT license.
Windows, macOS, Linux, Android, iOS	Command line
Accurate sky for any location, date and time Simulates the view through binoculars, telescopes and specific eyepieces	Explores sky views at different dates, times, and locations Shows stars, planets, moon phases, and constellations
The three-dimensional rendering needs a reasonable graphics card Default catalogues are limited until you download the extra ones	Displays the sky using terminal graphics.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.