Celestia is a free program for Windows that allows you to explore the known universe in three dimensions. To download and install the application, you need to visit the official Microsoft Store page. It is also recommended to have the latest version of the operating system.

Space simulator

The software offers a comprehensive simulation of diverse celestial entities. Ranging from planets and moons to clusters and galaxies, you can select entries from the database and view them. The position and movement of objects within the solar system is calculated in real time.

You have the possibility to navigate to and land on any celestial body. When used as a planetarium, the utility displays precise positions of solar system entities in the sky. There is also an option to toggle labels and other supplementary functions via keyboard shortcuts.

Expandable library

What is more, the catalog is readily expandable. There are various addons available which introduce new elements such as comets, stars, high-resolution textures for Earth and other solar system bodies. You can also install 3D models for asteroids.

It is worth mentioning that you may also discover imaginary objects inspired by renowned science fiction franchises. In case you want to generate and customize your own planets, you may try an application called MojoWorld.

Features

free to download and use;
compatible with modern Windows versions;
allows you to simulate the universe in 3D space;
you can search for and install different addons;
there is an option to zoom in and out.