Image of a rocket on a launch pad.

About InSight's Launch

InSight launched under pre-dawn skies from Vandenberg Air Force Base on the central coast of California on May 5, 2018 at 4:05 a.m. PT (7:05 a.m. ET).

The mission's launch period was open May 5 through June 8, 2018, with daily launch windows that lasted two hours per day. Launch opportunities were five minutes apart during each date's launch window. The first opportunity was at 4:05 a.m. PT on May 5.

InSight launched from Launch Complex 3 on an Atlas V-401 rocket provided by United Launch Alliance, Centennial Colorado, a joint venture of Boeing Co. and Lockheed Martin Corp.

The Atlas V is one of the biggest rockets available for interplanetary flight. This is the same type of rocket that launched the Mars Reconnaissance Orbiter in 2005.

Why InSight Launched from California

InSight is the first mission to another planet to leave Earth from Vandenberg Air Force Base. Missions to other planets normally launch from NASA's Kennedy Space Center and fly east, over water. That's because launching towards the east adds the momentum of Earth's eastward rotation to the launch vehicle's own thrust. But the Atlas V-401 is powerful enough to fly south towards the sea from Vandenberg Air Force Base. Besides, Vandenberg Air Force Base was more available at this time to accommodate InSight's five-week launch period.

The launch was only the beginning; the trip to Mars took about six months, on a journey of about 301 million miles (485 million kilometers).

InSight landed on Mars on Nov. 26, 2018.