In this episode of The Spoondrift, host Asher Leomund discusses a rocket booster (minimoon) that is leaving orbit around Earth as well as the use of compressed air to store energy. The discussion also diverges to the Kerbal Space Program video game.
Here are links to the articles discussed in the show:
Rocket Booster Minimoon: https://www.livescience.com/farewell-minimoon-so-2020.html
Compressing Air To Store Energy: https://www.bbc.com/news/business-54841528
Claude Cycle: https://chemistry-desk.blogspot.com/2011/06/claudes-process.html