As launch time approaches for NASA's first moonshot in more than half a century, anticipation is building for the Artemis II mission , which will send a crew of four astronauts on a nine-and-a-half-day voyage around the moon and back. Here's how to watch tonight's launch — and where it will be visible to skywatchers in person. What time will the Artemis II launch happen? The launch window for Artemis II opens at 6:24 p.m. EDT Wednesday and closes two hours later, at 8:24 p.m. EDT.  If the