NASA is considering a crewed launch of the SLS rocket and Orion spacecraft for its Exploration Mission-1.
A memo sent by NASA reveals the agency is considering adding crew to the maiden joint flight.
A study to assess the feasibility of adding a crew to Exploration Mission-1 will be undertaken.
If the first EM-1 mission becomes a crewed mission, the launch of the SLS and Orion vehicles will be delayed until at least 2019 due to required modifications.
The mission will last three weeks and will involve the Orion craft orbiting the Moon for six days.
The mission is the first planned launch of NASA’s Space Launch System (SLS) rocket and the second flight of the Orion spacecraft.