NASA's InSight lander detects major meteoroid impact on Mars

NASA's InSight lander detected a significant seismic event on December 24, which was later identified as a meteoroid impact. The impact created a large crater and exposed ice deposits near the Martian equator, a discovery with implications for future human exploration of Mars.

The meteoroid, estimated to be between 16 and 39 feet (5 to 12 meters) in size, struck the Amazonis Planitia region, creating a crater approximately 492 feet (150 meters) wide and 70 feet (21 meters) deep. The impact was confirmed by images from NASA's Mars Reconnaissance Orbiter (MRO), which captured before-and-after views of the area. The event also generated surface seismic waves, a first for Mars, offering new data on the planet's crustal structure.

The discovery was detailed in two papers published in the journal Science. Scientists noted that this is one of the largest craters observed forming in the solar system, as most known large craters on Mars are much older. The impact also exposed boulder-sized ice chunks, which are significant for future missions due to their potential use as a resource for astronauts.

InSight, which has been studying Mars' interior since 2018, has detected 1,318 marsquakes, including several from meteoroid impacts. However, the December 24 event was unique due to its size and the visibility of surface waves. The mission is expected to end soon as dust has significantly reduced the lander's power.

The impact's timing was narrowed down using data from MRO's cameras, which showed the blast zone and helped confirm the seismic event. The discovery of ice near the equator, a region previously thought to be too warm for such deposits, highlights the importance of understanding Mars' geology for future human exploration.