https://techcrunch.com/2022/09/26/watch-the-asteroid-smashing-dart-spacecraft-make-its-6-million-mile-shot-today/

One of NASA’s biggest crowd-pleasers in years is about to reach its denouement: if all goes well, the Double Asteroid Redirection Test spacecraft (or rather guided anti-space-rock missile) will impact its target at around 14,700 miles per hour. You can watch it live-ish right here at about 3 PM Pacific.

DART was launched last November and has spent the intervening months positioning itself for a perfect shot on Dimorphos, a 525-foot-wide asteroid in orbit around Didymos, half a mile wide (and more the type we’d need to worry about, planetarily speaking). Today is the big day.