Know about the most powerful NASA rocket SLS, which can lift 130 tonnes into orbit

The first SLS mission Exploration Mission 1in 2017 will launch an uncrewed Orion spacecraft to demonstrate the integrated system performance of the SLS rocket and spacecraft prior to a crewed flight.

The second SLS mission, Exploration Mission 2, is targeted for 2021 and will launch Orion and a crew of up to four American astronauts.