The Digital Press

Celestia is a free, expandable space simulation software that lets users explore the universe seamlessly from anywhere in the solar system to distant galaxies. It offers real-time accurate positions of celestial objects and supports user-created add-ons and custom objects.

Why it matters: Celestia provides an immersive educational tool for exploring space beyond Earth’s surface in real time.

The big picture: Its support for high-resolution textures, trajectories, and extensive catalogs empowers both casual users and space enthusiasts to deeply customize their experience.

The other side: Some users report issues like broken documentation links, small font sizes on high-res displays, and questions about project funding and Debian removal.

Commenters say: Enthusiasts appreciate Celestia’s detailed visualization and mobile versions but express concerns about usability, documentation, and transparency of project support.