IRAP<p>Between Mars and Jupiter are numerous <a href="https://social.numerique.gouv.fr/tags/asteroids" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>asteroids</span></a>, including Vista, the second largest, which the <a href="https://social.numerique.gouv.fr/tags/Dawn" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Dawn</span></a> probe “visited” some fifteen years ago.</p><p>Dawn's Doppler tracking via the Deep Space Network and onboard imaging data have enabled us to estimate the moment of inertia of the <a href="https://social.numerique.gouv.fr/tags/planetoid" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>planetoid</span></a> and deduce its “weak” internal stratification: a crust composed of magmatic rocks surrounds the mantle, which surmounts a small central core. But how did it form? </p><p>Find out below: <a href="https://www.irap.omp.eu/2025/06/mission-dawn-deux-hypotheses-sur-lorigine-de-lasteroide-vesta/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">irap.omp.eu/2025/06/mission-da</span><span class="invisible">wn-deux-hypotheses-sur-lorigine-de-lasteroide-vesta/</span></a></p>