China's enigmatic space activities raise eyebrows
China's Shijian-21 and Shijian-25 satellites teamed up in geostationary orbit (that's about 35405km above Earth) for an in-space refueling test, which, if successful, could help satellites last longer and cut down on space junk—a big deal for keeping our skies cleaner.
China's satellite servicing push
Shijian-25, launched earlier this year, is expected to approach Shijian-21 using robotic arms to dock and transfer fuel.
These kinds of moves are part of China's push to make satellite servicing in high orbits possible, which could save money and reduce debris.
US watching the whole thing closely
The US military kept a close eye on the whole thing, positioning their own satellites to get the best view.
It's not every day you see international space tech rivalries play out live, but this kind of monitoring is becoming more common as space gets busier.