In October 2016, the ExoMars, a joint probe between the European Space Agency (ESA) and Russian Space Agency (Roscomos), touched down on Mars. It wasn’t until April 2018 that it circled in its regular orbit 400 km above the Martian surface and was finally able to start its scientific mission.
This involves mapping the atmospheric composition of Mars with unprecedented accuracy. This is possible thanks to NOMAD, a precision measuring instrument developed by the Royal Belgian Institute for Space Aeronomy (BIRA-IASB) and various Belgian companies, which is on board the ExoMars. Among other things, it measures trace gases, i.e. gases that are present in minuscule concentrations in the atmosphere.
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Sunrise over the largest mountain in the solar system(planet Mars) . . Olympus Mons, located in the western hemisphere of Mars, is a massive shield volcano that is approx. 25 km (16 mi) high, making it nearly three times as tall as Mount Everest (the tallest mountain on planet Earth). Also, the massive diameter of 624 kilometers (374 miles) makes the volcano about the same size as the state of Arizona. The extraordinary size of Olympus Mons is likely because Mars lacks mobile tectonic plates. On Earth, we have tectonic plates that essentially slide around on a mechanically weak subsurface layer known as the asthenosphere. A combination of sea-floor spreading ridges and plate subduction keeps the plates of Earth consistently moving. As a result, when mantle-sourced plumes of molten rock (“hotspots”) rise into the overlying mobile tectonic plate, the associated volcanism at the surface migrates over time (i.e. Hawaii). During the eruption of Olympus Mons, the crust of Mars remained fixed over a stationary hotspot, and the volcano continuously discharged lava until it reached an enormous height. Olympus Mons has been heavily studied by planetary scientists, and will continue to give us clues to the geologic history of the red planet. Photo credit: NASA📸 : @nasa . . 🌟 Follow @milkyway_scispace for more . ▶️ Use #milkywayss in your captions to get featured
They give an important indication of how Mars has evolved, both in the past and today. Methane is one of these trace gases, which can indicate the presence of life. Recent research has shown that the concentrations have fallen sharply compared to previous measurements. It is still uncertain exactly how this has happened, making the mystery of methane on the red planet even greater. In June 2018, a gigantic dust storm broke out on Mars, which affected the water in the atmosphere. The amount of water vapor increases after a storm and the water is pushed up to a height of over 80 km, where it leaves the atmosphere. This partly explains the disappearance of water on Mars.
If the riddle is ever solved, we might find out whether people can survive on Mars.