NASA's InSight rover on Mars recorded the vibrations and sounds of four meteorite attack the surface of the red planet.
On September 19, scientists said that InSight detected seismic and sound waves from a series of impacts in 2020 and 2021. These are the first findings of meteorite impact on Mars since the landing gear began collecting data after making landfall in 2018. The impacts of the meteorite occurred about 85-290km from InSight's location in the vast plains of Elysium Planitia on Mars stretching across the equator of the red planet.
According to Space.com, the first meteorite discovered by scientists collided violently on September 5, 2021, exploding into many pieces. At least three separate pieces of debris have hit the surface of Mars, each of which leaves a c study of the volcano.
NASA's Mars rotation rover MRO has confirmed the location of these impacts from the rotation. The spacecraft launched in 2005, initially taking black and white photos of the regions, revealing dark patches on the Martian surface. After accurately identifying these impact locations, MRO continues to collect color and close-up images using the High-Resolution Scientific experimental imaging (HioresE) camera. The meteorite may have left additional holes around these collisions, but too small prevented HioresE from detecting them.
Previous analysis of data collected by InSight shows that the seismic measuring devices of the docking ship collected three impacts on May 27, 2020, February 18, 2021 and August 31, 2021. Four impacts create small earthquakes with an intensity of no more than 2 degrees.
Ingrid Daubar, a planetary scientist at Brown University in Rhode Island (USA), a member of the research team, said that after three years of waiting, InSight discovered the collision.
hanhitiese scientists are wondering why InSight has not detected further collisions of the meteorite on the red planet. Mars is not only located next to the main sub- planetary belt of the solar system - a hot spot for meteorites - but its thin atmosphere also allows meteorites to pass without destroying them. These factors mean that the rate of Meteorities appearing on the surface of Mars is higher than that of Earth.
Researchers are quite confident that the lack of detection devices is not a sign that InSight's seismic measuring device is faulty. In nearly 4 years of operation on the red planet, the device has detected more than 1,300 Martian earthquakes and is sensitive enough to detect seismic waves thousands of kilometers away.
InSight scientists have thought that collisions could be hidden by the noise from the wind on the red planet or by seasonal changes in the atmosphere. Researchers will access InSight data again to look for seismic traces of other meteorological collisions.
Any findings could help scientists better understand the age of Mars' surface. Counting collisions is a way for scientists to determine the age of the planet's surface, meaning new discoveries and any additional collisions could be very important in building the timeline for Mars.
Raphael Garcia, a planetary scientist at the French Aerospace Institute and co-author of the new study, said: The collisions are the Sun systems clock. We need to know the collision rate today to estimate the age of different surfaces.
By combining InSight data related to shockwaves generated when Meteorities hit the atmosphere with data collected from the orbit, scientists can also recreate the approach orbit of a specific meteorite. Scientists are learning more about the collision process, which could match different volcanic clast sizes with specific seismic and sound waves.
InSight's findings were published in the journal Nature Geoscience on September 19.
