IRAP<p>[First results from <a href="https://astrodon.social/tags/DORN" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DORN</span></a> on the <a href="https://astrodon.social/tags/Moon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Moon</span></a>] The recovery of samples of <a href="https://astrodon.social/tags/regolith" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>regolith</span></a> and lunar rocks, coupled with the analysis of <a href="https://astrodon.social/tags/surface" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>surface</span></a> gases by the <a href="https://astrodon.social/tags/DORN" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DORN</span></a> instrument, has enabled the scientists involved in the <a href="https://astrodon.social/tags/ChangE6" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ChangE6</span></a> mission to identify the occurrence of two volcanic episodes on the far side of the Moon, 4.2 and 2.8 billion years ago. For the record, the samples brought back by the <a href="https://astrodon.social/tags/Apollo" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Apollo</span></a> and <a href="https://astrodon.social/tags/Luna" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Luna</span></a> missions from the visible side of our satellite attest to a single volcanic event, dating back more than 3 billion years.</p><p>Further analyses are underway, which will “refine previous observations made by remote sensing, which have shown that the far side of the Moon is different, in terms of <a href="https://astrodon.social/tags/geophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geophysics</span></a> (differences in crustal thickness, for example) and the chemical and mineralogical composition of the rocks, from that of the visible side”, explains Pierre-Yves Meslin, astronomer at IRAP.</p><p>Info+ : <a href="https://www.polytechnique-insights.com/tribunes/espace/la-face-cachee-de-la-lune-les-premiers-echantillons-arrivent-sur-terre/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">polytechnique-insights.com/tri</span><span class="invisible">bunes/espace/la-face-cachee-de-la-lune-les-premiers-echantillons-arrivent-sur-terre/</span></a></p>