Mission sur Mars Un premier tremblement martien détecté

24 Avril, 2019, 03:34 | Auteur: Therese Cote
  • La mission In Sight a pour but d'écouter le coeur de la planète Mars

Le Centre national d'études spatiales est formel: le sismomètre français SEIS déployé sur Mars a capté il y a quelques jours son premier séisme martien.

Trois autres signaux, mais bien plus faibles que celui du 6 avril, ont été détectés au cours des deux derniers mois.

L'appareil a été déposé sur la planète le 19 décembre 2018 par un bras automatique de l'atterrisseur d'InSight.

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Ecouter battre le cœur de Mars était le principal objectif de cette mission américaine baptisé InSight. Cette première onde a pu être captée le 6 avril lors du 128 Sol (nom d'une journée sur Mars qui dure 24 h et 39 mn) grâce au sismomètre français SEIS qui a été confectionné par le CNES à Toulouse. "Nous avons attendu notre premier séisme martien pendant des mois ", ajoute le père du précieux instrument.

"C'est formidable d'avoir enfin le signe qu'il existe encore une activité sismique sur Mars", s'est félicité Philippe Lognonné, chercheur de l'Institut de Physique du Globe de Paris et concepteur du sismomètre martien.

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