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“Intro to the Solar System”
“Intro to the Solar System”

... • B. All material from the nebula was not drawn into the sun. • 1. Left over material collided together making larger objects. . • 2. These objects became the planets. • 3. Everything else became dwarf planets, moons, comets, ...
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... Each trip close to the Sun removes just a little material; 1P/Halley, for example, is expected to last about another 40,000 years. Sometimes a comet’s nucleus can disintegrate violently, as comet Linear did, and fall into the Sun. ...
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... • Stars passing "close" to the Sun can jostle these objects and cause them to fall inwards • There may be 1011 to 1012 comets in the outer Oort cloud, and perhaps ten times that many comets in the cloud as a ...
Earth Science Library wk 3.cwk (WP)
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... Solar System. Near the end of the formation of the planets, a period of heavy bombardment occurs as the planets sweep up any remaining debris in the Solar System. It is during this period, about 4 to 4.5 billion years ago, that most of the craters seen on planetary surfaces were formed. Predictions ...
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... At the surface, or photosphere, of the red super giant star Betelgeuse, the gravitational force between the star and a 1.00 kg mass of hot gas is only 2.19 × 10 -3 N. This is because the mean radius of Betelgeuse is so large. Given that the mass of Betelgeuse is 20 times that of the sun, or 3.98 × 1 ...
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... The Kuiper Belt is a disk-shaped region past the orbit of Neptune extending roughly from 30 to 50 AU from the Sun containing many small icy bodies. (An AU or Astronomical Unit is the mean distance from the Earth to the Sun). The Kuiper Belt has a large population (over 70,000) of small bodies. It is ...
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... • Atoms were mixed a lot in the gas of the solar nebula • Atoms also get mixed a lot in liquids, like lava or magma • But atoms stay fixed in rocks, new atoms don’t join the rock, existing atoms don’t leave the rock • Radioactive decay can find the time since the rock last solidified – If we know ho ...
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... • Atoms were mixed a lot in the gas of the solar nebula • Atoms also get mixed a lot in liquids, like lava or magma • But atoms stay fixed in rocks, new atoms don’t join the rock, existing atoms don’t leave the rock • Radioactive decay can find the time since the rock last solidified – If we know ho ...
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... crazy planet.‖ Brown still recalls the mnemonic he learned for the names of the planets: Martha visits every Monday and—a for asteroids—just stays until noon, period. ―The ‗period,‘ for Pluto, was always suspicious,‖ Brown says with a laugh. ―It didn‘t seem to fit. So maybe that was when I first got ...
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Integrative Studies 410 Our Place in the Universe
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... C. the sun captured the planets as they drifted through space. D. planets were spun out of the sun as smaller gas clouds and subsequently condensed. ...
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... &  Duncan   •  This  would  require  the  JF  to  be  extremely  young  −   probably,  unreasonably  young   •  A  more  realisIc  model  of  physical  evoluIon  may  be   called  for,  including  dormancy  and  rejuvenaIon   (e.g.,  Rick ...
No Slide Title
No Slide Title

... • Long-period comets – Longer than 200 years to go around once – Orbital path is random • Direction and plane of orbit – E.g. Comet Hale-Bopp – Originated in Oort cloud • Spherical cloud, 20 trillion miles beyond the Sun ...
Wednesday, March 27
Wednesday, March 27

... the same direction as the Sun's (exceptions: Venus, Uranus, Pluto) most moons revolve around their planets in the same direction as the rotation of the planets differentiation between inner (terrestrial) and outer (Jovian) ...
Chapter 12 Remnants of Rock and Ice What are asteroids like
Chapter 12 Remnants of Rock and Ice What are asteroids like

... • These large, icy objects have orbits similar to the smaller objects in the Kuiper Belt that become short period comets • So are they very large comets or very small planets? ...
Formation of the Solar System
Formation of the Solar System

... The nebula heats up during the collapse. The densest, hottest part of the nebula is at the center. As a result of this, all material very near the protosun existed in a gaseous state. As you move outward, the nebula is cooler. At different radii, the temperature is low enough for certain materials t ...
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Oort cloud



The Oort cloud (/ˈɔrt/ or /ˈʊərt/) or Öpik–Oort cloud, named after Dutch astronomer Jan Oort and Estonian astronomer Ernst Öpik, is a theoretical spherical cloud of predominantly icy planetesimals believed to surround the Sun at a distance of up to around 100,000 AU (2 ly). This places it at almost half of the distance to Proxima Centauri, the nearest star to the Sun, and in interstellar space. The Kuiper belt and the scattered disc, the other two reservoirs of trans-Neptunian objects, are less than one thousandth as far from the Sun as the Oort cloud. The outer limit of the Oort cloud defines the cosmographical boundary of the Solar System and the region of the Sun's gravitational dominance.The Oort cloud is thought to comprise two regions: a spherical outer Oort cloud and a disc-shaped inner Oort cloud, or Hills cloud. Objects in the Oort cloud are largely composed of ices, such as water, ammonia, and methane.Astronomers conjecture that the matter composing the Oort cloud formed closer to the Sun and was scattered far into space by the gravitational effects of the giant planets early in the Solar System's evolution. Although no confirmed direct observations of the Oort cloud have been made, it may be the source of all long-period and Halley-type comets entering the inner Solar System, and many of the centaurs and Jupiter-family comets as well. The outer Oort cloud is only loosely bound to the Solar System, and thus is easily affected by the gravitational pull both of passing stars and of the Milky Way itself. These forces occasionally dislodge comets from their orbits within the cloud and send them towards the inner Solar System. Based on their orbits, most of the short-period comets may come from the scattered disc, but some may still have originated from the Oort cloud.
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