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Comets, vagrants of the universe
... Comets are space rubbish; they are remains from the formation of the solar system 4.600 million years ago. They consist of water, dry ice, ammonia, methane, iron, magnesium and silicates. They are fragile, dynamic and small, their diameter may measure about 10 kilometres. Comets have 3 parts: nucleu ...
... Comets are space rubbish; they are remains from the formation of the solar system 4.600 million years ago. They consist of water, dry ice, ammonia, methane, iron, magnesium and silicates. They are fragile, dynamic and small, their diameter may measure about 10 kilometres. Comets have 3 parts: nucleu ...
The Comet`s Tale (key)
... Origin of Comets 1. What is the Oort Cloud made of, and where is it? In 1950 the Dutch astronomer Jan Van Oort proposed that the long period comets we see from Earth come from a huge ‘cloud’ of perhaps a trillion objects which exists far outside the orbits of the planets. Oort estimated the size of ...
... Origin of Comets 1. What is the Oort Cloud made of, and where is it? In 1950 the Dutch astronomer Jan Van Oort proposed that the long period comets we see from Earth come from a huge ‘cloud’ of perhaps a trillion objects which exists far outside the orbits of the planets. Oort estimated the size of ...
The Solar System
... Kuiper Belt A large body of small objects orbiting (the short period comets <200 years) the Sun in a radial zone extending outward from the orbit of Neptune (30 AU) to about 100 AU. Pluto maybe the biggest of the Kuiper Belt object. Oort Cloud ...
... Kuiper Belt A large body of small objects orbiting (the short period comets <200 years) the Sun in a radial zone extending outward from the orbit of Neptune (30 AU) to about 100 AU. Pluto maybe the biggest of the Kuiper Belt object. Oort Cloud ...
The Deep Impact flyby spacecraft (upper L)
... The Deep Impact flyby spacecraft (upper L) shown as it records photos and data after the impactor crashes onto the surface of Comet Tempel 1, delivering 19 Gigajoules (that’s equivalent to 4.8 tons of TNT) of kinetic energy to excavate the crater on July 4, 2005. ...
... The Deep Impact flyby spacecraft (upper L) shown as it records photos and data after the impactor crashes onto the surface of Comet Tempel 1, delivering 19 Gigajoules (that’s equivalent to 4.8 tons of TNT) of kinetic energy to excavate the crater on July 4, 2005. ...
What are Asteroids, Meteors and Comets? How are they similar
... In 1996 National Aeronautics and Space Administration (NASA) launched the probe NEAR (Near Earth Asteroid Rendezvous) Flew by Mathilde in 1997 Flew by Eros in 1998 ...
... In 1996 National Aeronautics and Space Administration (NASA) launched the probe NEAR (Near Earth Asteroid Rendezvous) Flew by Mathilde in 1997 Flew by Eros in 1998 ...
meteor shower
... – stays in the solar system until the gravitational pull of a planet knocks it out (Short and Long Period comets) • Unbound: Parabolic shape – goes around once and doesn’t return – either burned up from the sun or thrown out by a planets gravitational swing. (Single apparition comets) ...
... – stays in the solar system until the gravitational pull of a planet knocks it out (Short and Long Period comets) • Unbound: Parabolic shape – goes around once and doesn’t return – either burned up from the sun or thrown out by a planets gravitational swing. (Single apparition comets) ...
951 Gaspra
... 2. Minor planets mostly orbit between Mars and Jupiter 3. Comets formed in the outer solar system and were flung outward by close encounters with other planets 4. Comets can be trapped in the inner solar system by planetary encounters 5. The head and tail of a comet glow from sunlight shining on gas ...
... 2. Minor planets mostly orbit between Mars and Jupiter 3. Comets formed in the outer solar system and were flung outward by close encounters with other planets 4. Comets can be trapped in the inner solar system by planetary encounters 5. The head and tail of a comet glow from sunlight shining on gas ...
A Comet Nucleus
... Beyond Neptune, there are at least 70,000 ice/rock bodies with diameters larger than 100 km and orbits of radius 30 to more than 50 AU. This ring of bodies (cf. the Asteroid belt) is called the Kuiper belt. Astronomers believe that it is the source of short-period comets. Plutinos are a special subs ...
... Beyond Neptune, there are at least 70,000 ice/rock bodies with diameters larger than 100 km and orbits of radius 30 to more than 50 AU. This ring of bodies (cf. the Asteroid belt) is called the Kuiper belt. Astronomers believe that it is the source of short-period comets. Plutinos are a special subs ...
Asteroid - Hoover12
... Meteoroid – small rocky material in space Meteor – in the atmosphere (falling star) Meteorite – any piece of rock than fell to the ground from the sky Comet means hair (Greek), an icy leftover ...
... Meteoroid – small rocky material in space Meteor – in the atmosphere (falling star) Meteorite – any piece of rock than fell to the ground from the sky Comet means hair (Greek), an icy leftover ...
What`s That Up In The Sky???
... Comets………Dirty Balls of Ice They can be seen by us only when they pass by the sun and the sun’s heat melts them. The comet's tail is made of material from the comet; gas from the ices and dust that is mixed in with the ice. They escape as the comet melts. The tail always points away from the sun du ...
... Comets………Dirty Balls of Ice They can be seen by us only when they pass by the sun and the sun’s heat melts them. The comet's tail is made of material from the comet; gas from the ices and dust that is mixed in with the ice. They escape as the comet melts. The tail always points away from the sun du ...
The Structure of Comets - Oregon State University
... Pluto and its Moons • Pluto is the only planet in the solar system that we have not visited. • Pluto and its largest moon Charon would fit comfortably within the United States. • Charon orbits Pluto at a steep angle to the ecliptic, and Pluto’s axis is heavily tipped as well. • Two new moons were d ...
... Pluto and its Moons • Pluto is the only planet in the solar system that we have not visited. • Pluto and its largest moon Charon would fit comfortably within the United States. • Charon orbits Pluto at a steep angle to the ecliptic, and Pluto’s axis is heavily tipped as well. • Two new moons were d ...
PHAS 2B17 Physics of the Solar System
... nucleus and is mainly made of frozen water, dust and sometimes other frozen substances such as ammonia.Solar radiation heats the nucleus and gives it an atmosphere of gas and dust called the coma. A comet's distinctive tail is caused by solar radiation and a stream of charged particles that constant ...
... nucleus and is mainly made of frozen water, dust and sometimes other frozen substances such as ammonia.Solar radiation heats the nucleus and gives it an atmosphere of gas and dust called the coma. A comet's distinctive tail is caused by solar radiation and a stream of charged particles that constant ...
Can Comets Contain Water? A "Wet"
... weakly bound gravitational objects 1-100km in size. Possible 26Al heating may have caused partial melting. Cosmic ray transformed outer cm-thick crust. Black goo / burnt toast. • Tensile strength of interior estimated 1-10 kPa. (Tidal stress breakup, fireballs) In comparison plaster of paris has a t ...
... weakly bound gravitational objects 1-100km in size. Possible 26Al heating may have caused partial melting. Cosmic ray transformed outer cm-thick crust. Black goo / burnt toast. • Tensile strength of interior estimated 1-10 kPa. (Tidal stress breakup, fireballs) In comparison plaster of paris has a t ...
Wednesday, October 24, 2007
... – Solidified from liquid, similar to planetary rocks – Broken fragments of a planet-sized, differentiated parent body: stones from mantle/crust, irons from ...
... – Solidified from liquid, similar to planetary rocks – Broken fragments of a planet-sized, differentiated parent body: stones from mantle/crust, irons from ...
Chapter 10
... 2. If all the asteroids were combined into one object, they would only form a body about 1,500 km in diameter, much smaller than our Moon. 3. It is most likely that asteroids are primordial material that never formed into a planet because of Jupiter’s gravitational influence. ...
... 2. If all the asteroids were combined into one object, they would only form a body about 1,500 km in diameter, much smaller than our Moon. 3. It is most likely that asteroids are primordial material that never formed into a planet because of Jupiter’s gravitational influence. ...
Our Solar System
... Interplanetary debris was gathered by the sun and planets, but some was not picked up. These floating chunks of rock and dust formed other objects in our solar system: asteroids and comets. Asteroids are known as minor planets, and are visible as star-like points of light that move nightly with resp ...
... Interplanetary debris was gathered by the sun and planets, but some was not picked up. These floating chunks of rock and dust formed other objects in our solar system: asteroids and comets. Asteroids are known as minor planets, and are visible as star-like points of light that move nightly with resp ...
Goal: To understand what comets are and to explore the Oort cloud.
... gas giant region and were probably tossed there by Jupiter. • They are usually a bit bigger than short period comets, and higher densities. • A bright one comes into the inner solar system every 5-10 years. • Tend to be a bit brighter than short period comets. ...
... gas giant region and were probably tossed there by Jupiter. • They are usually a bit bigger than short period comets, and higher densities. • A bright one comes into the inner solar system every 5-10 years. • Tend to be a bit brighter than short period comets. ...
Document
... • They range in size from a few meters to more than 900 km in diameter - too small to be a planet. • Most asteroids are located in the asteroid belt, between Mars & Jupiter. • Some asteroids that orbit planets are considered moons. • Some astronomers consider them to be minor planets (like the moons ...
... • They range in size from a few meters to more than 900 km in diameter - too small to be a planet. • Most asteroids are located in the asteroid belt, between Mars & Jupiter. • Some asteroids that orbit planets are considered moons. • Some astronomers consider them to be minor planets (like the moons ...
Objects in Space
... object in space takes around another one. An object in an orbit is called a satellite. A satellite can be natural, like the Earth or the Moon. It can also be man-made, like the Space Shuttle or the ISS.—NASA ...
... object in space takes around another one. An object in an orbit is called a satellite. A satellite can be natural, like the Earth or the Moon. It can also be man-made, like the Space Shuttle or the ISS.—NASA ...
Comets and Asteroids
... – Composed of mainly water ice, with traces of other ices, mixed with silicate grains and dust. – Model known as the “dirty snowball” model. ...
... – Composed of mainly water ice, with traces of other ices, mixed with silicate grains and dust. – Model known as the “dirty snowball” model. ...
The Main Point Comets are
... • Cometary activity is caused by sublimation of ices • The activity appears to be confined to isolated jets on the nucleus • Comet nuclei are very dark, typically reflecting < 4% of the incident sunlight (as dark as a charcoal briquet) • Comet nuclei have very low density (0.1 to 0.25 g/cm3), and th ...
... • Cometary activity is caused by sublimation of ices • The activity appears to be confined to isolated jets on the nucleus • Comet nuclei are very dark, typically reflecting < 4% of the incident sunlight (as dark as a charcoal briquet) • Comet nuclei have very low density (0.1 to 0.25 g/cm3), and th ...
comets asteroid meteor differnences
... The second and third characters "W7" are a shorthand way of counting the number of asteroids found during the 2nd half of August 2000. The first asteroid discovered was "2000 QA"; the second was "2000 QB;" The second letter cycles through the alphabet until it reaches "Z" and then it goes back to th ...
... The second and third characters "W7" are a shorthand way of counting the number of asteroids found during the 2nd half of August 2000. The first asteroid discovered was "2000 QA"; the second was "2000 QB;" The second letter cycles through the alphabet until it reaches "Z" and then it goes back to th ...
ESS Solar System Astronomy Exam
... Astronomers estimate that the nebular cloud from which our solar system formed contained about two to three times the mass of the Sun and was about 100 astronomical units (AU) across. This massive loosely-bound cloud of dust, ice particles, and gases (primarily hydrogen and helium) had some small ra ...
... Astronomers estimate that the nebular cloud from which our solar system formed contained about two to three times the mass of the Sun and was about 100 astronomical units (AU) across. This massive loosely-bound cloud of dust, ice particles, and gases (primarily hydrogen and helium) had some small ra ...
Asteroids and Comets
... The Oort Cloud is a large spherical cloud with a radius from 50,000 to 100,000 A.U. surrounding the Sun filled with billions to trillions of comets. It has not been directly observed. they have orbital periods of 100,000's to millions of years. However, their orbits are so elliptical that they spend ...
... The Oort Cloud is a large spherical cloud with a radius from 50,000 to 100,000 A.U. surrounding the Sun filled with billions to trillions of comets. It has not been directly observed. they have orbital periods of 100,000's to millions of years. However, their orbits are so elliptical that they spend ...
asteroid-comet-meteor presentation
... The second and third characters "W7" are a shorthand way of counting the number of asteroids found during the 2nd half of August 2000. The first asteroid discovered was "2000 QA"; the second was "2000 QB;" The second letter cycles through the alphabet until it reaches "Z" and then it goes back to th ...
... The second and third characters "W7" are a shorthand way of counting the number of asteroids found during the 2nd half of August 2000. The first asteroid discovered was "2000 QA"; the second was "2000 QB;" The second letter cycles through the alphabet until it reaches "Z" and then it goes back to th ...
Comet
![](https://en.wikipedia.org/wiki/Special:FilePath/Deep_Impact_HRI.jpeg?width=300)
A comet is an icy small Solar System body that, when passing close to the Sun, heats up and begins to outgas, displaying a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of solar radiation and the solar wind upon the nucleus of the comet. Comet nuclei range from a few hundred metres to tens of kilometres across and are composed of loose collections of ice, dust, and small rocky particles. The coma and tail are much larger and, if sufficiently bright, may be seen from the Earth without the aid of a telescope. Comets have been observed and recorded since ancient times by many cultures.Comets have a wide range of orbital periods, ranging from several years to potentially several millions of years. Short-period comets originate in the Kuiper belt or its associated scattered disc, which lie beyond the orbit of Neptune. Long-period comets are thought to originate in the Oort cloud, a spherical cloud of icy bodies extending from outside the Kuiper belt to halfway to the next nearest star. Long-period comets are directed towards the Sun from the Oort cloud by gravitational perturbations caused by passing stars and the galactic tide. Hyperbolic comets may pass once through the inner Solar System before being flung out to interstellar space.Comets are distinguished from asteroids by the presence of an extended, gravitationally unbound atmosphere surrounding their central nucleus. This atmosphere has parts termed the coma (the central part immediately surrounding the nucleus) and the tail (a typically linear section consisting of dust or gas blown out from the coma by the Sun's light pressure or outstreaming solar wind plasma). However, extinct comets that have passed close to the Sun many times have lost nearly all of their volatile ices and dust and may come to resemble small asteroids. Asteroids are thought to have a different origin from comets, having formed inside the orbit of Jupiter rather than in the outer Solar System. The discovery of main-belt comets and active centaurs has blurred the distinction between asteroids and comets.As of November 2014 there are 5,253 known comets, a number that is steadily increasing. However, this represents only a tiny fraction of the total potential comet population, as the reservoir of comet-like bodies in the outer Solar System (in the Oort cloud) is estimated to be one trillion. Roughly one comet per year is visible to the naked eye, though many of these are faint and unspectacular. Particularly bright examples are called ""Great Comets"". Comets have been visited by unmanned probes such as the European Space Agency's Rosetta, which became the first ever to land a robotic spacecraft on a comet, and NASA's Deep Impact, which blasted a crater on Comet Tempel 1 to study its interior.