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4. Formation of Solar Systems
4. Formation of Solar Systems

... its formation from a gas cloud collapsing due to selfgravity some 4.5 billion years ago. In this proto-solar system, small grains of solid matter clumped together, eventually producing the planets we see today. Other stars with planets have now been observed; a wide variety of planetary systems can ...
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... a new class of heavenly bodies: the dwarf planets. The new object was named Eris. Eris, Pluto and the asteroid Ceres were the first official dwarf planets. Makemake and Haumea were added to the class in 2008. There will probably be more soon, for an object in orbit around the Sun and at least 500 km ...
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... Orbit around common center of mass in 6.4 d Separation 19640 km (1/20 Earth-Moon distance) Reduced mass is 0.24% mass of Earth MCharon / MPluto = 0.09 to 0.16 Orbital plane of PlutoCharon system is inclined 122.5° with respect to their orbit around the Sun December 10th, 2003 ...
Part 1 ( pp. 2-5) In considerable detail To display a diversity
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... similar to those of Jupiter and Saturn. Thus we might conclude that the initial disk must have had a mass roughly equal to at least ten times the present mass of Jupiter. More likely, planet formation will not be efficient, and there was probably much more material available that has since been lost ...
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... This week's issue of Naturefeatures an interesting announcement by Chadwick Trujillo (Gemini Observatory) and Scott Sheppard (Carnegie Institution for Science). These two observers have found an object orbiting the Sun, designated 2012 VP113, that they first spotted 17 months ago with the 4-m Blanc ...
AST 301 Fall 2007 Review for Exam 3 This exam covers only
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... The study of the solar system is the most local aspect of astronomy, which includes:  the eight traditional planets  ―dwarf planets‖ and ―plutoids‖  smaller icy planetesimals beyond Neptune (Kuiper Belt objects)  planets’ moons and rings  comets  asteroids  meteoroids  the Sun—Sol The ―sol‖a ...
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... The Sun and the planets formed from a rotating disk of dust and gas. As the speed of rotation increased, the center of the disk flattened out and matter became more concentrated in the center of the disk, where the Sun eventually formed. The growth of the planets began as solid bits of matter began ...
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... • Comets have highly elliptical orbits, indicating they come from the outer part of the solar system • Comets often have highly inclined orbits (not on the ecliptic plane), indicating a different origin from planets and asteroids ...
Formation of solar system HW
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... The distance between the Sun and each of its planets is very large, but the Sun and each of the planets are also very large. Gravity keeps each planet orbiting the Sun because the star and its planets are very large objects. The force of gravity also holds moons in orbit around planets. If you have ...
Origin of the Solar System ppt
Origin of the Solar System ppt

... • We know today that comets are orbiting the Sun primarily in two broad regions. – The Kuiper (Koy-per) belt: (Begins in the vicinity of the orbit of Neptune ~ 30AU) – The Oort Cloud: Huge spherical region centered on the Sun and extending perhaps half way to nearest stars. ...
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pals_20160211_howpla.. - Department of Physics and Astronomy

... “Drag” from proto-planetary nebula gas? Gravitational interactions with each other? We think that Uranus & Neptune formed closer to Sun, were flung to their present orbits by interactions with Jupiter, maybe Saturn ...
Chapter6- Our Solar System and Its Origin
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... • We know today that comets are orbiting the Sun primarily in two broad regions. – The Kuiper (Koy-per) belt: (Begins in the vicinity of the orbit of Neptune ~ 30AU) – The Oort Cloud: Huge spherical region centered on the Sun and extending perhaps half way to nearest stars. ...
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Side View of Our Solar System The Origins of

... • We know today that comets are orbiting the Sun primarily in two broad regions. – The Kuiper (Koy-per) belt: (Begins in the vicinity of the orbit of Neptune ~ 30AU) – The Oort Cloud: Huge spherical region centered on the Sun and extending perhaps half way to nearest stars. ...
HW #8 Answers (Due 10/21)
HW #8 Answers (Due 10/21)

... Shock waves from supernova explosions – The highest mass stars use their fuel very rapidly and therefore die while still nearby the region in which they formed. They die as supernova explosions which send out shock waves that run into the molecular cloud from which they formed. This helps to compre ...
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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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