Glossary term: Terre
Description: La Terre est la troisième planète à partir du Soleil et la cinquième plus grande planète du système solaire. Il s'agit d'une planète tellurique, rocheuse d'un rayon d'environ 6 400 kilomètres (km). Sa masse est d'environ six mille milliards de milliards de kilogrammes.
La distance typique de la Terre par rapport au Soleil est d'environ 150 millions de kilomètres. Cette distance est définie comme une unité astronomique. La Terre met 365,26 jours pour parcourir son orbite autour du Soleil. La Terre a un satellite naturel, la Lune.
La Terre abrite des millions d'espèces de créatures vivantes, dont l'homme ; c'est le seul endroit connu à ce jour où il y a de la vie dans l'Univers. On pense qu'elle s'est formée il y a environ 4,54 milliards d'années. La Terre possède une atmosphère et une magnétosphère qui bloquent les radiations nocives et permettent ainsi la multiplication des organismes vivants. La Terre possède également beaucoup d'eau en surface (c'est la seule planète du système solaire connue pour cela), ce qui lui donne une couleur bleue.
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".
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La Terre observée depuis Apollo 17
Credit: NASA/Equipage d'Apollo 17/Archive du Projet Apollo
License: PD Public Domain icons
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