Le dôme Gruithuisen Gamma vu par LRO. © Nasa, GSFC, Arizona State University

NASA wants to reveal the secrets of these mysterious domes on the surface of the moon

Exploring and colonizing Mars is a dream, but the moon with the lowercase letter “L” is the satellite of a planet. For example Phobos and Deimos are the two moons of Mars.
the moon
The moon with a head “L” is the only natural satellite of the Earth; It may have been caused by a collision 4.4 years ago… “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midoriginal/c/7/8/c785911d64_50034415_lune-05 .jpg “data-url = “https://news.google.com/sciences/definitions/universe-lune-2550/” data-more = “Read More”>the moon in hand. Our natural satellite still contains many secrets and the announced return of both rovers andhomo sapiens on the lunar surface during the decade of 2020 should provide us with stunning images, especially if we take into account the fact that it may be at rest in metaverse.

Among the mysteries that are waiting to be solved with the moon, we can cite riddles The nature of masons, although we already have very reasonable ideas about themas well as nature volcanic domes Gruithuisen, named in honor of Franz von Gruithuisen (1774-1852), a naturalist and astronomer Bavaria.

To understand why the Gruithuisen domes are a lunar geological mystery, we must already know that two main types of rocks dominate the lunar surface, the basalt formation
This rock… “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midoriginal/7/7/5/77529dcd51_45443_def-basalt-hartlutjosibennoehr-wikimediacommonsjpg.jpg “data-url=” https://news.google.com/planete/definitions/structure-terre-basalte-1412/ “data-more=”read more”>basalt From the lunar seas andanorthosite from the heights. They are easily spotted with their color sometimes… “data-image=” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/7/9/5/7951943cc1_85596_couleur.jpg “data-url=” https://news.google.com/science/definitions/physics-color-4126/” data-more = “Read More”>the color From the ground – basalts are indicated by dark areas and anorthosites with brighter areas.

However, mineral and morphological studies of the lunar surface have been conducted using orbiting satellites capable of remote sensing and high-resolution images. PrecisionLike the lunar reconnaissance vehicle (LRO) from NASA or Kaguya From Jaxa, reveal some anomaly. They are usually a few scattered and relatively small volcanic centers composed of rocks rich in silica and composed of many minerals. It is thus found in some whole foods, in bones and cartilage, for example. bound to other atoms (aluminum, magnesium, calcium, etc.), … “data-image=” https://cdn.futura-sciences.com/buildsv6/images/midoriginal/0/2/9/029e94324a_93543_silice .jpg” data-url =” https://news.google.com/planete/definitions/geologie-silice-15955/ “data-more=”read more”>silicaLike the rhyolite or dacite, i.e. volcanic versions of granite or granodiorite. This is the case of the Gruithuisen domes, whose chemical composition is derived from measurements made with the instrument. prognosis by LRO It really indicates that it is a volcanic edifice similar to some of those known on Earth which consists of rocks much richer in silica than the basalts of the ocean floor.

Volcanoes produced by plate tectonics on Earth but on the Moon

Now, that’s the problem, on Earth these volcanic buildings are formed in areas subduction of oceanic plates though composed of particles carried away by erosion agents, which are deposited in successive layers…”data-image=” https://cdn.futura-sciences.com/ buildsv6/images/midoriginal/2/6 /1/261f67921e_47250_def-sediment-eutrophisationethypoxia-flickr.jpg “data-url=” https://news.google.com/planete/definitions/paleontologie-sediment-1045/ “data-more = “read more”>sediment submerged under a continental plate. This is the case of the study of volcanoes is volcanology or volcanology. Volcanic activity is one of… “data-image=” https://cdn.futura-sciences.com/buildsv6/images/midoriginal/d/c/f/dcfcbbf72e_125167_volcan-arenal-costa-rica. jpg “data-url = “https://news.google.com/planete/definitions/volcanologie-volcano-3537/” data-more = “Read more”>volcanoes From the Andes, or for example the famous Mount St. Helenswhose rocks come from cooling magma and lava It consists of complex processes involving the remelting of rocks and sediments in subduction zones.

But we know very well that there is no drift for…” data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/9/f/c/ 9fcec5bdc0_45137_tectonic-plate-wikimediacommons-dp.jpg “data-url=” https://news.google.com/planet/definitions/geology-tectonic-plates-970/ “data-more=”read more”>tectonic plates On the surface of the Moon and even fewer oceans, sediments settle to the bottom. How, then, to explain the existence of Gruithuisen domes?

Selenologists, with their knowledge of the geophysics and geochemistry of rocky processes on Earth, have some hypotheses and models about this. But as usual, data is required to confirm it…or refute it! To really do comparative planetary and volcanology, you have to go to the site with the tools.

That’s fine, that’s exactly what NASA wants to do, confirming with a recent announcement that it wants to send a lander in a few years that will carry it with it. rover To the top of one of the domes of Gruithuisen.

So NASA just gave $35 million to two planetary scientists, Keri Donaldson Hanna And the Adrian Dovewho will lead this mission on behalf of Vulcan Moon Imaging and Spectroscopy Explorerie Lunar VISE.

Keri Donaldson Hanna explains: We will use a range of instruments on a lander and rover to study the formation of domes, including the composition and properties of regolith and rocks, and how lunar dust interacts with the rover and rover when exploring the volcanic dome. There is likely to be a treasure trove of knowledge waiting to be discovered, which will not only help us develop exploration in the future Robotics and lunar man, but it can also help us better understand the history of our planet as well as other planets in the solar system. »

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