dcterms modified equal to or less than 2020-11-24T17:16:58.160Zequal to or more than 2020-11-24T17:16:58.160Z
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1007 original
definition Fourth planet from Sun and the seventh largest. Mass 6.42 x 10^26 g (0.11 Earth's); radius 3397 km. Mean distance from Sun 1.52 AU. Sidereal period 687 days; synodic period 779.9 days. Surface temperature 248 K., rotational period 24h 37m 22.66s. Obliquity 23°59'. Atmosphere more than 90% CO_2, traces of O_2, CO, H_{2}O. Two tiny satellites (Phobos and Deimos), both of which are locked in synchronous rotation with Mars.
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contributor AAS_Frey.Katie_Admin original