He told his family and a few friends. He dropped hints to a couple of colleagues. So hardly anyone knew that the airline pilot could have—should have—been on board when SpaceX launched its first tourists into orbit last year.

Meet Kyle Hippchen, the real winner of a first-of-its-kind sweepstakes, who gave his seat to his college roommate.

Astronauts aboard the International Space Station farewelled over 2000 kg of scientific experiments and hardware on Sunday 23 January as a cargo Dragon spacecraft began its return to Earth.

ESA astronaut Matthias Maurer captured the resupply vehicle in all its glory as it departed the orbital outpost at 15:40 GMT/16:40 CET. It splashed down approximately 29 hours later off the coast of Florida, U.S..

The SpaceX spacecraft arrived at the Space Station just before Christmas, bringing new experiments alongside Christmas treats. It returned with a bellyful of science, including several European experiments that were quickly transported to NASA's Space Station Processing Facility at the agency's Kennedy Space Center in Cape Canaveral, and other items that flew with ESA astronaut Thomas Pesquet during his Alpha mission.

Among the experiments were an investigation into the effect of microgravity on resting muscle tone known as Myotones, cell cultures for the Cytoskeleton experiment that looks at how human cells behave in weightlessness, and a new device called Thermo-Mini for continually monitoring core body temperature that you might have seen Matthias sporting on Station.

At first glance, two contrasting circular features jump out of this scene: a volcano that rises gently above the surface with a collapsed caldera system, and an impact crater that digs down below. Both features have different stories to tell.

Volcano in a lava sea

Lying in the shadows of the Solar System's largest volcano, Olympus Mons, the much smaller Jovis Tholus shield volcano bears its own evidence of a long eruptive history.

Its complex caldera system comprises at least five craters. The largest is about 28 km wide, and sits off center, as clearly seen in the plan view images. The calderas step down towards the southwest where the youngest eventually meets with the surrounding sea of even younger lava flows. The lavas create a shoreline around the flanks, obscuring the original relief of the volcano, which now only sits about 1 km above the surrounding plains.