What are the minimum system requirements for running Celestia?

The minimum system requirements for running the latest version of Celestia (2.1.0) are as follows:

- Processor: 1GHz

- RAM: 1GB

- Graphics: OpenGL 2.0 compatible graphics card with 256MB of video memory

- Storage: 2GB of available hard disk space

- Operating System: Windows 7, 8, 10, macOS 10.12 or later, Linux (Ubuntu 16.04 or later, Fedora 28 or later, Debian 9 or later)