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Irregular moons are probably minor planets that have been captured from surrounding space. Most irregular moons are less than 10 kilometres (6.2 mi) in diameter. The earliest published discovery of a moon other than Earth's was by Galileo Galilei, who discovered the four Galilean moons orbiting Jupiter in 1610. Over the following three ...
The first known natural satellite was the Moon, but it was considered a "planet" until Copernicus' introduction of De revolutionibus orbium coelestium in 1543. Until the discovery of the Galilean satellites in 1610 there was no opportunity for referring to such objects as a class.
Pages in category "Satellites orbiting the Moon" The following 19 pages are in this category, out of 19 total. This list may not reflect recent changes. A.
There are 293 confirmed moons in our cosmic neighborhood. By studying these worlds, astronomers hope to learn about ancient asteroid collisions, space volcanoes, and the origins of life itself.
Intended to orbit the Moon and return to Earth. All first-stage engines shut down 10 seconds after launch; launch vehicle crashed and exploded on the launch pad. Spacecraft landed safely 2 kilometres (1.2 mi) from the launch site after using launch escape sequence. [68] 71: Luna 15 (E-8-5 No.401) Luna 15: 13 July 1969: Proton-K/D: Lavochkin: Lander
Both moons, which bring the total of Neptune’s known natural satellites to 18, were first spotted in September 2021, but required follow-up observations with different telescopes over the past ...
Solar System space probes operational as of November 2024. This is a list of active space probes which have escaped Earth orbit. It includes lunar space probes, but does not include space probes orbiting at the Sun–Earth Lagrangian points (for these, see List of objects at Lagrangian points). A craft is deemed "active" if it is still able to ...
The English proper name for Earth's natural satellite is typically written as Moon, with a capital M. [19] [20] The noun moon is derived from Old English mōna, which stems from Proto-Germanic *mēnōn, [21] which in turn comes from Proto-Indo-European *mēnsis 'month' [22] (from earlier *mēnōt, genitive *mēneses) which may be related to the verb 'measure' (of time).