Two spacewalkers have installed the last of eight roll-out solar arrays on the International Space Station, lifting its generating capacity to about 215 kilowatts.
A handful of planets seem to break the weight limit for rocky worlds. A new study argues they are artefacts of spotty, active stars rather than real heavyweights.
Hubble has measured the dayside glow of TOI-2431 b, a lava world with a 5.4 hour year, and found it about as hot as a bare rock can get. Most planets like it run cooler.
Hydrogen’s ultraviolet glow can blow gas and dust out of dense young star clusters without stopping them forming stars, a new study finds. The effect could help explain why Webb sees so many bright early galaxies.
