Nombre total de pages vues

Affichage des articles dont le libellé est ASTRONOMY - Perseverance: How to Land on Mars. Afficher tous les articles
Affichage des articles dont le libellé est ASTRONOMY - Perseverance: How to Land on Mars. Afficher tous les articles

20/02/2021

ASTRONOMY - Perseverance: How to Land on Mars

 2021 February 20

See Explanation.  Clicking on the picture will download
the highest resolution version available.

Perseverance: How to Land on Mars
Image Credit: NASAJPLMars 2020

Explanation: Slung beneath its rocket powered descent stage Perseverance hangs only a few meters above the martian surface, captured here moments before its February 18 touchdown on the Red Planet. The breath-taking view followed an intense seven minute trip from the top of the martian atmosphere. Part of a high resolution video, the picture was taken from the descent stage itself during the final skycrane landing maneuver. Three taut mechanical cables about 7 meters long are visible lowering Perseverance, along with an electrical umbilical connection feeding signals (like this image), to a computer on board the car-sized rover. Below Perseverance streamers of martian dust are kicked-up from the surface by the descent rocket engines. Immediately after touchdown, the cables were released allowing the descent stage to fly to a safe distance before exhausting its fuel as planned.

BIOMES - Prairies - savanes - brousses

Des prairies, des savanes et des brousses, il y en a aussi dans les régions tempérées. FuturaSciences