NASA says it is “very unlikely” the agency will be able to recover a Mars spacecraft that has been out of contact for more than a month.

After a health issue, four astronauts are set to leave the International Space Station early, with a pre-dawn Pacific splashdown planned for Thursday, Jan. 15.

Among other things, the James Webb Space Telescope is designed to get us closer to finding habitable worlds around faraway stars. From its perch a million miles from Earth, Webb’s huge gold-coated mirror collects more light than any other telescope put into space.