Comet A3 Tsuchinshan-ATLAS survived its rumored disintegration and may be the brightest comet of the year this September and October. Finder maps here.
Two of Polaris Dawn astronauts completed the 1st ever civilian spacewalk this morning. But all 4 astronauts were exposed to the vacuum of space. A new record!
Sun news for September 12: An X1.3 flare happened on the sun's southeast limb (edge) earlier today. Geomagnetic storming is ongoing. Auroras on the way?
When DART spacecraft hit asteroid Dimorphos, it released debris that should arrive at Mars and Earth, creating the 1st human-made meteor shower for the planets.