The Almost Moon

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This is hot enough to create a surrounding molten liquid iron outer core, but not hot enough to warm the surface. The lunar geologic timescale is based on the most prominent impact events, including Nectaris, Imbrium, and Orientale; structures characterized by multiple rings of uplifted material, between hundreds and thousands of kilometers in diameter and associated with a broad apron of ejecta deposits that form a regional stratigraphic horizon. Estimates are 5 tons of comet particles strike the Moon's surface every 24 hours, resulting in the ejection of dust particles.

The Almost Moon Summary | SuperSummary

The Moon's highest altitude at culmination varies by its lunar phase, or more correctly its orbital position, and time of the year, or more correctly the position of the Earth's axis. The noun moon is derived from Old English mōna, which (like all its Germanic cognates) stems from Proto-Germanic *mēnōn, [22] which in turn comes from Proto-Indo-European *mēnsis "month" [23] (from earlier *mēnōt, genitive *mēneses) which may be related to the verb "measure" (of time). The brightest and largest object in our night sky, the Moon makes Earth a more livable planet by moderating our home planet's wobble on its axis, leading to a relatively stable climate.This proximity to Earth has given it immeasurable cultural significance and means it plays a key role in Earth's tides. In 2009, LCROSS sent a 2,300kg (5,100lb) impactor into a permanently shadowed polar crater, and detected at least 100kg (220lb) of water in a plume of ejected material. Elements that have been detected include sodium and potassium, produced by sputtering (also found in the atmospheres of Mercury and Io); helium-4 and neon [90] from the solar wind; and argon-40, radon-222, and polonium-210, outgassed after their creation by radioactive decay within the crust and mantle.

The Moon | Natural History Museum The Moon | Natural History Museum

Selenian / s ə l iː n i ə n/ [28] is an adjective used to describe the Moon as a world, rather than as a celestial object, [29] but its use is rare. Eileen Battersby of The Irish Times described the novel as "comparable to Jeffrey Eugenides's The Virgin Suicides (1993), is a candid, at times horribly funny and often beautifully touching exploration of one woman's realisation that her life has been swallowed, or rather cancelled. The craters themselves, which have been preserved for billions of years, provide an impact history for the Moon and other bodies in the inner solar system.

The crust on the Moon's near side permanently facing Earth is thinner, featuring larger areas flooded by material of the once molten mantle forming today's lunar mare. When micrometeoroids impact the surface of the Moon, most of the material in the crater is vaporized.