The last-ever Delta-II rocket is scheduled to launch from Vandenberg Air Force Base this Saturday.

The Delta-II rocket has launched 150+ times and has a 98.7% success rate, according to the United Launch Alliance. The rocket will carry NASA's ICESat-2 spacecraft to orbit, which will use a laser to map the Earth's ice sheets.

The launch will be on Saturday, September 15 at 5:10 a.m. PST.