Moon - Wikipedia. The Moon is Earth's only permanentnatural satellite. It is the fifth- largest natural satellite in the Solar System, and the largest among planetary satellites relative to the size of the planet that it orbits (its primary). It is the second- densest satellite among those whose densities are known (after Jupiter's satellite Io). The average distance of the Moon from the Earth is 3. There are several hypotheses for its origin; the most widely accepted explanation is that the Moon formed from the debris left over after a giant impact between Earth and a Mars- sized body called Theia. The Bitbag is your one-stop source of news, reviews, features, how-tos, and most relevant information on today’s hottest and most trending topics in the world of Tech, Social Media, Entertainment, and Lifestyle.
The Moon is in synchronous rotation with Earth, always showing the same face, with its near side marked by dark volcanic maria that fill the spaces between the bright ancient crustal highlands and the prominent impact craters. It is the second- brightest regularly visible celestial object in Earth's sky, after the Sun, as measured by illuminance on Earth's surface. Its surface is actually dark, although compared to the night sky it appears very bright, with a reflectance just slightly higher than that of worn asphalt. Its prominence in the sky and its regular cycle of phases have made the Moon an important cultural influence since ancient times on language, calendars, art, mythology, and, it is often speculated, the menstrual cycles of the female of the human species. The Moon's current orbital distance is about thirty times the diameter of Earth, with its apparent size in the sky almost the same as that of the Sun, resulting in the Moon covering the Sun nearly precisely in total solar eclipse. This matching of apparent visual size will not continue in the far future. The Moon's linear distance from Earth is currently increasing at a rate of 3. These missions returned over 3. Moon's origin, the formation of its internal structure, and its subsequent history. Since the Apollo 1. A collection of amazing space pictures featuring images from the Hubble telescope and time lapse photos of the night sky. Free wallpaper downloads.The next-generation NOAA satellite series will improve observations of the atmosphere, lightning, space weather, and more. It will help improve weather forecasts in the future. Not all suites are created equal. The suites and penthouses in Palms Place are an elegant and stylish escape into luxury. Explore Palms Place >. Moon has been visited only by uncrewed spacecraft. Name and etymology. The usual English proper name for Earth's natural satellite is . In literature, especially science fiction, . A less common adjective is selenic, derived from the Ancient Greek Selene (. The name Diana is connected to dies meaning 'day'. Formation. Several mechanisms have been proposed for the Moon's formation 4. Eighteen months prior to an October 1. Bill Hartmann, Roger Phillips, and Jeff Taylor challenged fellow lunar scientists: . Go back to your Apollo data, go back to your computer, do whatever you have to, but make up your mind. Don't come to our conference unless you have something to say about the Moon's birth. Afterward there were essentially only two groups: the giant impact camp and the agnostics. Computer simulations of a giant impact have produced results that are consistent with the mass of the lunar core and the present angular momentum of the Earth. These simulations also show that most of the Moon derived from the impactor, rather than the proto- Earth. The isotopic equalization of the Earth- Moon system might be explained by the post- impact mixing of the vaporized material that formed the two. Because most of the material that went into orbit to form the Moon was thought to come from Theia, this observation was unexpected. In 2. 00. 7, researchers from the California Institute of Technology announced that there was less than a 1% chance that Theia and Earth had identical isotopic signatures. Variations on the giant impact hypothesis may explain this data. Physical characteristics. Internal structure. The Moon is a differentiated body: it has a geochemically distinct crust, mantle, and core. The Moon has a solid iron- rich inner core with a radius of 2. Around the core is a partially molten boundary layer with a radius of about 5. Its composition is not well defined, but is probably metallic iron alloyed with a small amount of sulfur and nickel; analyses of the Moon's time- variable rotation suggest that it is at least partly molten. Although similar to terrestrial basalts, lunar basalts have more iron and no minerals altered by water. Several geologic provinces containing shield volcanoes and volcanic domes are found within the near side . This raises the possibility of a much warmer lunar mantle than previously believed, at least on the near side where the deep crust is substantially warmer due to the greater concentration of radioactive elements. An initially hotter mantle and/or local enrichment of heat- producing elements in the mantle could be responsible for prolonged activities also on the far side in the Orientale basin. They have been radiometrically dated to having formed 4. There are estimated to be roughly 3. Moon's near side alone. Although only a few multi- ring basins have been definitively dated, they are useful for assigning relative ages. Because impact craters accumulate at a nearly constant rate, counting the number of craters per unit area can be used to estimate the age of the surface. The finer regolith, the lunar soil of silicon dioxide glass, has a texture resembling snow and a scent resembling spent gunpowder. A secondary cratering process caused by distal ejecta is thought to churn the top two centimetres of regolith a hundred times more quickly than previous models suggested. Their curvilinear shape is often accentuated by low albedo regions that wind between the bright swirls. Presence of water. Liquid water cannot persist on the lunar surface. When exposed to solar radiation, water quickly decomposes through a process known as photodissociation and is lost to space. However, since the 1. Moon. However, later radar observations by Arecibo, suggest these findings may rather be rocks ejected from young impact craters. The spectrometer observed absorption lines common to hydroxyl, in reflected sunlight, providing evidence of large quantities of water ice, on the lunar surface. The spacecraft showed that concentrations may possibly be as high as 1,0. The inclusions were formed during explosive eruptions on the Moon approximately 3. This concentration is comparable with that of magma in Earth's upper mantle. Although of considerable selenological interest, Hauri's announcement affords little comfort to would- be lunar colonists. The main lunar gravity features are mascons, large positive gravitational anomalies associated with some of the giant impact basins, partly caused by the dense mare basaltic lava flows that fill those basins. There are some puzzles: lava flows by themselves cannot explain all of the gravitational signature, and some mascons exist that are not linked to mare volcanism. It does not currently have a global dipolar magnetic field and only has crustal magnetization, probably acquired early in lunar history when a dynamo was still operating. This is supported by the apparent location of the largest crustal magnetizations near the antipodes of the giant impact basins. The lunar atmosphere was later studied by LADEE. Its sources include outgassing and sputtering, a product of the bombardment of lunar soil by solar wind ions. Estimates are 5 tons of comet particles strike the Moon's surface each 2. The particles strike the Moon's surface ejecting moon dust above the Moon. The dust stays above the Moon approximately 1. On average, 1. 20 kilograms of dust are present above the Moon, rising to 1. The dust measurements were made by LADEE's Lunar Dust EXperiment (LDEX), between 2. LDEX detected an average of one 0. Dust particle counts peaked during the Geminid, Quadrantid, Northern Taurid, and Omicron Centauridmeteor showers, when the Earth, and Moon, pass through comet debris. The cloud is asymmetric, more dense near the boundary between the Moon's dayside and nightside. Because of this, the Moon's solar illumination varies much less with season, and topographical details play a crucial role in seasonal effects. No such regions exist at the south pole. Similarly, there are places that remain in permanent shadow at the bottoms of many polar craters. This is the coldest temperature in the Solar System ever measured by a spacecraft, colder even than the surface of Pluto. However, because Earth is moving in its orbit around the Sun at the same time, it takes slightly longer for the Moon to show the same phase to Earth, which is about 2. The Moon's orbit is subtly perturbed by the Sun and Earth in many small, complex and interacting ways. For example, the plane of the Moon's orbital motion gradually rotates, which affects other aspects of lunar motion. These follow- on effects are mathematically described by Cassini's laws. This results in it nearly always keeping the same face turned towards Earth. However, due to the effect of libration, about 5. Moon's surface can actually be seen from Earth. The Moon used to rotate at a faster rate, but early in its history, its rotation slowed and became tidally locked in this orientation as a result of frictional effects associated with tidal deformations caused by Earth. The side of the Moon that faces Earth is called the near side, and the opposite the far side. The far side is often inaccurately called the . It is speculated that these patches were the poles of the Moon billions of years ago, before it was tidally locked to Earth. Despite this, it is the brightest object in the sky after the Sun. The edges of the full moon seem as bright as the centre, with no limb darkening, due to the reflective properties of lunar soil, which reflects more light back towards the Sun than in other directions. The Moon does appear larger when close to the horizon, but this is a purely psychological effect, known as the Moon illusion, first described in the 7th century BC. The full moon is highest during winter. The 1. 8. 6- year nodes cycle also has an influence: when the ascending node of the lunar orbit is in the vernal equinox, the lunar declination can go as far as 2. This means the Moon can go overhead at latitudes up to 2. Albino Blacksheep. April. 12. 01. 6So in 2. The Ultimate Showdown (of Ultimate Destiny). This is the exclusive World Wide Web premiere of The Ultimate Showdown 2 (the Second Time Around)! Firstly, the music is a a little more updated. Sounds less synthesized, but is otherwise the same notes, the same melody. Now here's what's better. This doesn't even include all 1. Pokemon (as a collective) that all take place in this second showdown battle. None of the characters from the first one return because they all died in the first one. Except the kid that holds ice cream. He's back, but 1. Just like the fans of the first animation are! Some of the lyrics are just so catchy. Even at the end there's only one character left. Him being another friendly public access persona, and the happy little trees that appear work as forshadowing. And because this was a big production, it took more than one animator. Credit to these animator friends on Twitter: @Toen.
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