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Kohoutek Is Coming - Institute of Current World Affairs
Kohoutek Is Coming - Institute of Current World Affairs

... to serve as a proper omen than one that comes around like clockwork every so many years. In fact, we now know that only some comets move in orbits that bring them around the sun periodically. Most of these ...
Document
Document

... Summary • Orbital migration of gas giants almost certainly occurred early in solar system history • Resonance-crossing between Jupiter and Saturn scatters both comets and asteroids • This can account for a delayed LHB • Gas giant orbits and Trojan population are ...
11.2b The Solar System Asteroids and Gas Giants
11.2b The Solar System Asteroids and Gas Giants

... Jupiter, the first of the Gas Giant planets, is the largest planet, having a mass that is 2.5 X more than all the other planets combined (318 X Earth’s mass). Jupiter’s “Great Red Spot” is a storm (the size of three Earths) raging in the clouds of hydrogen and helium on the outer surface of the ...
Lecture 14
Lecture 14

... light heat up and emit infrared light. So we can find new stars by using and infrared telescope. ...
Classifying the Solar System
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... • By this definition, Pluto is no longer a planet since it has not cleared its neighbourhood of other bodies. – Pluto, and other small spherical solar system bodies in orbit around the Sun are now known as dwarf planets. Spherical bodies in the solar system are in hydrostatic equilibrium. The inward ...
The Comet`s Tale Assessment
The Comet`s Tale Assessment

... a) the time it takes for the comet to travel once around the Sun b) the shortest distance from the Sun to the comet along the comet’s path c) the number of times the comet orbits the Sun in a millennium d) the amount of time between sightings of the comet from Earth 4. What is a short-period comet? ...
Comets and the Age of the Solar System
Comets and the Age of the Solar System

... so far is that of Slusher1). The case is usually made as follows. The standard model of a comet is one in which all of the material observed is released by an icy nucleus only a few kilometres across. This model strongly suggests that comets are very fragile, losing much of their material during eac ...
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PPT - osmaston.org.uk
PPT - osmaston.org.uk

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6th grade Test Review KEY
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... Every object in the universe attracts every other object. 5. What happens as you travel farther out into space? The distances between planets get larger; it also gets colder. 6. Where is the asteroid belt located? What are asteroids made of? Between the inner and outer planets, or Mars and Jupiter. ...
PSC101-lecture12
PSC101-lecture12

... • Within the disk, material is constantly colliding with one another. If the collisions are not too violent material may stick together. • In the outer parts of the Solar Nebula the planets become large enough to have a significant gravitational pull and collect gas around them. • Planets in the inn ...
GRAVITY FIELD IN EXTERNAL PARTS OF THE SOLAR SYSTEM
GRAVITY FIELD IN EXTERNAL PARTS OF THE SOLAR SYSTEM

... Thus, part of the Kuiper belt objects and comets move in the interstellar medium, but remain deep within the incidence of the Sun. According to (Oort, 1950) exist cloud around the Sun of comet nuclei, called the Oort cloud. This cloud is not available observations. But if it exists, the comet nucleu ...
Powerpoint for today
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The scattered disk population as a source of Oort cloud comets

... 3.4. Dynamical evolution of some particular SDOs We illustrate in the following a few interesting examples of real SDOs that have different end states. Object 2000 GY32 ended up in Jupiter’s region (Fig. 4). For a little more than 1 Gyr its evolution is very smooth because it has its perihelion well ...
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Asteroids, Comets, Meteors…what`s the difference

... Asteroids are rocky or metallic objects, most of which orbit the ________________________ in the asteroid belt between the planets ________________________ and Jupiter. A few asteroids approach the Sun more closely. Asteroids are also known as ________________________ or minor planets. The first ___ ...
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Inventory of the Solar System

... Kuiper belt, an icy belt of comet-like bodies extending beyond Neptune's orbit (30-100 AU ). Kuiper belt Comets orbit in same direction as planets and in same general plane. ...
Unit 2 Study Guide (word)
Unit 2 Study Guide (word)

... Asteroids are small irregular shaped objects in space. They range in size going from as small as 3 km to 900 km. They are made of rock, metals, and some organic matter (carbon). Most are found in the asteroid belt between Mars and Jupiter. Comets are sometimes called dirty snowballs. They are made o ...
Unit 2 Study Guide - Grant County Schools
Unit 2 Study Guide - Grant County Schools

... Asteroids are small irregular shaped objects in space. They range in size going from as small as 3 km to 900 km. They are made of rock, metals, and some organic matter (carbon). Most are found in the asteroid belt between Mars and Jupiter. Comets are sometimes called dirty snowballs. They are made o ...
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... years to _hundreds of thousands_ of years. Some comets pass through the inner Solar System only once before being thrown out into interstellar space. 1. Short-period comets originate in the _Kuiper Belt_, a disk of small rocky, icy bodies orbiting the Sun beyond the orbit of Neptune. 2. Long-period ...
Lecture12
Lecture12

... planet, which has fallen to earth). Comet: an ancient icy body. Near the sun, has two tails of material pointing away from the sun. Come from the Kuiper Belt, and the much larger “oort cloud” which stretches half way to the next star. ...
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... The Leftovers (small bodies) • Asteroids: – Made of rock & metal (density 2-3 g/cc) – Sizes: Few 100km to large boulders – Most are found in the Main Belt (2.1-3.2 AU) ...
8origin4s
8origin4s

... material, acquire large gas envelopes 3 Edge of solar system -- leftover and ejected icy planetesimals form Kuiper belt and Oort cloud ...
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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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