NASA’s InSight lander detected a meteoroid impact on Mars

NASA’s InSight lander may have had its last hurrah. Researchers have learned that a marsquake the lander detected in Mars’ Amazonis Planitia region on December 24th, 2021 was actually a meteoroid impact — the first time any mission has witnessed a crater forming on the planet. Scientists found out when they looked at before-and-after pictures from the Mars Reconnaissance Orbiter (MRO) revealing a 492-foot gash in the landscape.

The meteoroid is believed to have been somewhere between 16 and 39 feet long. It would have burned up in Earth’s skies, but it was large enough to survive Mars’ extra-thin atmosphere. The impact was violent, digging a hole 70 feet deep and tossing debris as far as 23 miles away from the crater. It also exposed subsurface ice that hasn’t been seen so close to the martian equator before now. A sound adaptation of Insight’s data (below) shows just how “loud” the event was compared to Mars’ regular activity.

It took some time to confirm the event. A Malin Space Science Systems team used two of the MRO’s cameras (the black-and-white Context Camera and the Mars Color Imager) to spot the crater in February. Pictures …read more