Tonight, Watch NASA's IRIS Launch Live

Don't miss it! Coverage begins at 9 p.m.

Preparing for Launch

Inside the Launch Vehicle Data Center at Vandenberg Air Force Base in California.NASA/Daniel Casper

Tonight, NASA will launch their solar satellite IRIS (Interface Region Imaging Spectrograph). Don't miss the live stream tonight on PopSci.com--just find your way back here at 9 p.m. EDT, when coverage begins, or at about 10:25 p.m. (just prior to the reported launch window) if you'd rather skip all the previews!