Live coverage: Space station crew back on Earth

After crystallizing a partnership to retrieve samples from the surface of Mars and return them to Earth, NASA and European Space Agency officials are seeking government funding commitments before the end of this year to carry out a multibillion-dollar robotic mission that could depart Earth with a pair of rocket launches as soon as 2026.

A year-and-a-half after announcing plans to launch two private citizens on a flight around the moon using the company’s Falcon Heavy rocket and Dragon capsule, SpaceX posted a tweet late Thursday announcing apparently revised plans to launch a “private passenger” on a moon flight using SpaceX’s new BFR rocket.

Astronauts Randy Bresnik and Mark Vande Hei headed outside the International Space Station Thursday on a spacewalk to replace one end of the lab’s Canadian-built robotic arm, a changeout that engineers say will restore the device to full capability.