Du fait de son absence d’atmosphère, la surface de la Lune est constamment bombardée par le rayonnement cosmique du Soleil, des photons de toutes longueurs d’ondes, ainsi que des météorites plus ou moins grosses. Toutes ces interactions peuvent libérer certains atomes du régolithe et les envoyer dans l’espace où ils pourront être accélérés par la pression des photons solaires. Une étude montre aujourd’hui les caractéristiques de ce type d’émanation pour le sodium, qui forme ce qui ressemble à une véritable queue de comète et qui est visible une fois par mois lors de chaque nouvelle Lune, lorsque la Terre se trouve dans l’axe Soleil-Lune. Une étude publiée dans Journal of Geophysical Research.
Emissions
- Ça Se Passe Là-Haut
- #1142 : L'origine du faisceau de sodium de la Lune
Publié le par eric simon
Eric Simon
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