NASA and Lockheed Martin, the primary contractor for the Orion spacecraft, are now exploring the possibility of launching Orion on rockets other than the Space Launch System (SLS). This consideration ...

The Trump administration is threatening to cancel Boeing's gigantic SLS space rocket after just three launches. SLS has only launched once already. Future launches are planned for 2026 and 2027.

Stephen D. Creech, second from left, assistant deputy associate administrator (technical) for the Moon to Mars Program, speaks while he’s joined by, from left, Mark Pond, senior director for NASA ...

The US space agency NASA on Wednesday cast a shadow on the future of its new heavy-lift rocket, the SLS -- acknowledging development delays on a project that is already years behind. But Wednesday's ...