The private space flight, SpaceX, completed a historic mission with the first all-civilian flight crew last weekend. The four members of the Inspiration4 crew raised $200 million for St. Jude Children's Research Hospital, and helped prove SpaceX founder Elon Musk's belief that non-professional astronauts can venture into space in regularity.

Every successful mission has its learning moments, however. One key takeaway from a three-day trip in space: Spacecraft bathrooms aren't ideal whatsoever.

In responding to followers asking about the mission, Musk tweeted Monday night that the Inspiration4 crew had some difficulties with the bathroom and promised upgrades for future missions.

"Definitely upgraded toilets :) We had some challenges with it this flight," Musk tweeted. The billionaire also promised better WiFi and oven.

While Musk didn't elaborate (for which we'll thank him), Inspiration4 member Jared Isaacman told Insider in July the facilities were located near the spacecraft's large cupola window.

"It's not a ton of privacy," he said. "But you do have this kind of privacy curtain that cuts across the top of the spacecraft, so you can kind of separate yourself from everyone else.

Engineers have successfully shown how water and oxygen can be extracted by cooking up lunar soil, in order to support future Moon bases. A laboratory demonstrator, developed by a consortium of the Politecnico Milano, the European Space Agency, the Italian Space Agency and the OHB Group, is presented this week at the Europlanet Science Congress (EPSC) 2021.

The set-up uses a two-step process, well known in industrial chemistry for terrestrial applications, that has been customized to work with a mineral mixture that mimics the lunar soil. Around 50% of lunar soil in all regions of the Moon is made up of silicon- or iron-oxides, and these in turn are around 26% oxygen. This means that a system that efficiently extracts oxygen from the soil could operate at any landing site or installation on the Moon.

In the experimental set-up, the soil simulant is vaporized in the presence of hydrogen and methane, then "washed" with hydrogen gas.

Three residents of the International Space Station will take a short ride aboard a Soyuz MS-18 spacecraft Tuesday, Sept. 28, relocating the spacecraft to prepare for the arrival of the next set of station crew members.

Expedition 65 flight engineers Mark Vande Hei of NASA and Oleg Novitskiy and Pyotr Dubrov of the Russian Space Agency Roscosmos will undock from the station's Earth-facing Rassvet module at 8:21 a.m. EDT. They will dock again at the Nauka Multipurpose Laboratory Module at 9 a.m. This will be the first time a spacecraft has attached to the new Nauka module, which arrived at the station in July.

Live coverage of the maneuver will begin at 8 a.m. on NASA Television, the NASA app, and the agency's website.