NASA and SpaceX are preparing to launch four astronauts to the International Space Station (ISS) on Wednesday night. The new astronauts will relieve the Crew-9 astronauts, who will head back to Earth a few days later after being stuck on the ISS for nine months.

It’s launch day for four astronauts who will soon be on their way to the International Space Station. The otherwise routine flight will be closely watched because it kicks off a series of events culminating in NASA astronauts Suni Williams and Butch Wilmore’s long-awaited trip back to Earth.

NASA’s latest space weather mission, PUNCH (Polarimeter to Unify the Corona and Heliosphere), has officially gone online, marking a major leap forward in our ability to monitor and predict solar activity.