[ad_1]
The depth is also considerable – 13 kilometers. The bottom of the moon shows the rock of the moon, exposed during the impact. This is the South Pole, the Aitken Basin, on the other side of the Moon.
The new study provides evidence that there is a huge piece of metal in the center of the pool, probably left by a crater-like asteroid. The mbad of a piece of metal – formerly called "density anomaly" – is one trillion kilograms, but its exact size is unknown.
It can be a compact object located a few tens or hundreds of kilometers deep, but the anomaly can be caused by a metal better distributed on the mantle.
This result was obtained by examining data from two missions – GRAIL and Moon Review Probe (LRO). The GRAIL mission measured very precisely the gravity of the Moon, and therefore the distribution of matter on our satellite and the topography of the LRO.
By combining the data, the researchers found that the area after the South Pole-Aitken Basin was denser than anywhere else on the Moon. The source of this mbad could have been the core of the object that created the pool: if this object was big enough so that the heavier chemical elements would settle in its center, the central part could not be s & # 39; 39, collapse after the impact, but would remain stuck in the coat.
True, possible and alternative explanation: When the moon was formed, the metal oxides could survive in the mantle and not sink into the nucleus. A more accurate determination of the origin of the anomaly would be given by the more accurate age of the pool: if it was formed by the lunar crust, the knee of the affected asteroid had to be s & rsquo; To sink into the core of the moon and if the pool emerged later, the asteroid residue could get stuck.
The results of the study are published in Geophysical Research Letters.
[ad_2]
Source link
