It's been a while ...

　Dear Orbiter users and developers,

　I haven't been around this place in quite some time, and for personal reasons haven't been able to push Orbiter development along for a few years now.
　 In order to keep Orbiter alive and allow others to work on it, I have decided to publish the sources under an open source license:

（以下略、続きはソースでご確認下さい）

Orbiter Forum　 Jul 27, 2021
https://www.orbiter-forum.com/threads/orbiter-is-now-open-source.40023/

関連サイト
Orbiter Space FlightSimulatorがオープンソースになりました
https://blog.desdelinux.net/ja/orbiter-space-flight-simulator-ya-es-open-source/