NASA Likely to Fly First Deep Space Mission on Less Powerful Rocket

NASA will likely launch its first astronauts into deep space since the Apollo program on a less powerful version of its Space Launch System rocket than originally planned. Although it has not been officially announced, in recent weeks mission planners at the space agency have begun designing ‘Exploration Mission 2’ to be launched on the Block 1 version of the SLS rocket, which has the capability to lift 70 tons to low Earth orbit.

Source: arstechnica.com