Comets
... What are we learning from Stardust? -The comet’s nucleus has a surprising amount of minerals that formed in a high temperature environment (but comets are COLD in the outer solar system!). Material formed closer to our Sun ...
... What are we learning from Stardust? -The comet’s nucleus has a surprising amount of minerals that formed in a high temperature environment (but comets are COLD in the outer solar system!). Material formed closer to our Sun ...
Collision Course
... more energy than the world’s entire nuclear arsenal. It hits the atmosphere at a 100 times faster than a speeding bullet. Then a second later it crashes into the ground with an explosive force of 100 million tonnes of TNT. According to astronomers, that’s what would happen if a space rock 10 kilomet ...
... more energy than the world’s entire nuclear arsenal. It hits the atmosphere at a 100 times faster than a speeding bullet. Then a second later it crashes into the ground with an explosive force of 100 million tonnes of TNT. According to astronomers, that’s what would happen if a space rock 10 kilomet ...
A crater is a large, bowl-shaped hole found in solid, rocky surfaces
... Gaseous planets have little or no evidence of impact craters, even though meteoroids strike gaseous planets as often as they strike rocky planets. Craters leave only a temporary record in the gaseous atmosphere. Craters on Earth Earth also was heavily cratered during its formation, and it still rece ...
... Gaseous planets have little or no evidence of impact craters, even though meteoroids strike gaseous planets as often as they strike rocky planets. Craters leave only a temporary record in the gaseous atmosphere. Craters on Earth Earth also was heavily cratered during its formation, and it still rece ...
Questions about Comets: Created by Laura Vican, 2014 Q: What are
... Q: When were comets formed? A: Most comets were formed shortly after our planets formed. Originally, the entire Solar System was a giant cloud of gas and dust. When that cloud collapsed, most of the material went into the forming Sun. Some of the rocks and gas accreted (stuck together) to form plane ...
... Q: When were comets formed? A: Most comets were formed shortly after our planets formed. Originally, the entire Solar System was a giant cloud of gas and dust. When that cloud collapsed, most of the material went into the forming Sun. Some of the rocks and gas accreted (stuck together) to form plane ...
Is Pluto a planet or a Kuiper Belt comet?
... • Why is there an asteroid belt? • Orbital resonances with Jupiter disrupted the orbits of planetesimals, preventing them from accreting into a planet. Those that were not ejected from this region make up the • How are meteorites related to asteroid belt today. Most asteroids? asteroids in other reg ...
... • Why is there an asteroid belt? • Orbital resonances with Jupiter disrupted the orbits of planetesimals, preventing them from accreting into a planet. Those that were not ejected from this region make up the • How are meteorites related to asteroid belt today. Most asteroids? asteroids in other reg ...
CHP 25
... b. were not present in the solar nebula at the location where the asteroids formed. c. are only found in the outer layers of asteroids and not in the core. d. are very volatile and evaporated from the asteroids before they could decay. e. are only found on rocks that formed on the earth and in no ot ...
... b. were not present in the solar nebula at the location where the asteroids formed. c. are only found in the outer layers of asteroids and not in the core. d. are very volatile and evaporated from the asteroids before they could decay. e. are only found on rocks that formed on the earth and in no ot ...
Asteroids,Comets, Meteor ppt.
... • Why is there an asteroid belt? • Orbital resonances with Jupiter disrupted the orbits of planetesimals, preventing them from accreting into a planet. Those that were not ejected from this region make up the • How are meteorites related to asteroid belt today. Most asteroids? asteroids in other reg ...
... • Why is there an asteroid belt? • Orbital resonances with Jupiter disrupted the orbits of planetesimals, preventing them from accreting into a planet. Those that were not ejected from this region make up the • How are meteorites related to asteroid belt today. Most asteroids? asteroids in other reg ...
Asteroids,Comets, Meteor ppt.
... • Why is there an asteroid belt? • Orbital resonances with Jupiter disrupted the orbits of planetesimals, preventing them from accreting into a planet. Those that were not ejected from this region make up the • How are meteorites related to asteroid belt today. Most asteroids? asteroids in other reg ...
... • Why is there an asteroid belt? • Orbital resonances with Jupiter disrupted the orbits of planetesimals, preventing them from accreting into a planet. Those that were not ejected from this region make up the • How are meteorites related to asteroid belt today. Most asteroids? asteroids in other reg ...
Comets - Helios
... Meteor Showers As the comet circles the Sun its orbit fills up with lost material ...
... Meteor Showers As the comet circles the Sun its orbit fills up with lost material ...
Week 6 - Asteroids, Comets, and Meteors
... Are meteors dangerous? Yes and no. Since most meteors disintegrate in Earth's atmosphere, the meteorites which make it to the surface are very small. The damage they cause is minor, such as a broken window or dented car. However, scientists estimate at least large 1,000 meteors which pass through Ea ...
... Are meteors dangerous? Yes and no. Since most meteors disintegrate in Earth's atmosphere, the meteorites which make it to the surface are very small. The damage they cause is minor, such as a broken window or dented car. However, scientists estimate at least large 1,000 meteors which pass through Ea ...
Impact Cratering
... ring(s). The rim of complex craters consist of inward-facing terraces that have slipped downward. The hinge under the original rim has been lost in the terrace formation. The basic shapes of both craters and the surrounding ejecta blankets is circular. An old (several hundred years) argument against ...
... ring(s). The rim of complex craters consist of inward-facing terraces that have slipped downward. The hinge under the original rim has been lost in the terrace formation. The basic shapes of both craters and the surrounding ejecta blankets is circular. An old (several hundred years) argument against ...
Asteroid Belt
... comet, then it's a big one: current estimates put its diameter at 70 miles (113 km). ...
... comet, then it's a big one: current estimates put its diameter at 70 miles (113 km). ...
Comets
... • Oort Cloud, 10,000 AU from Sun, reservoir of long period comets, stored there billions of years • Small objects much more abundant • Cometary activity is triggered by sunlight • Comet tails: dust, shaped by solar radiation; ion or plasma tail shaped by solar wind • Comet grains: CHON + refractory ...
... • Oort Cloud, 10,000 AU from Sun, reservoir of long period comets, stored there billions of years • Small objects much more abundant • Cometary activity is triggered by sunlight • Comet tails: dust, shaped by solar radiation; ion or plasma tail shaped by solar wind • Comet grains: CHON + refractory ...
What`s That Up In The Sky???
... Comets………Dirty Balls of Ice How did comets form??????? Astronomers are not certain how comets formed, but most believe that comets formed at the same time our solar system did, perhaps even in among the planets. Comets are made of a mixture of ices (water, methane, carbon dioxide, etc) and dust. Th ...
... Comets………Dirty Balls of Ice How did comets form??????? Astronomers are not certain how comets formed, but most believe that comets formed at the same time our solar system did, perhaps even in among the planets. Comets are made of a mixture of ices (water, methane, carbon dioxide, etc) and dust. Th ...
asteroid-comet-meteor presentation
... Comets………Dirty Balls of Ice How did comets form??????? Astronomers are not certain how comets formed, but most believe that comets formed at the same time our solar system did, perhaps even in among the planets. Comets are made of a mixture of ices (water, methane, carbon dioxide, etc) and dust. Th ...
... Comets………Dirty Balls of Ice How did comets form??????? Astronomers are not certain how comets formed, but most believe that comets formed at the same time our solar system did, perhaps even in among the planets. Comets are made of a mixture of ices (water, methane, carbon dioxide, etc) and dust. Th ...
For Creative Minds - Arbordale Publishing
... When a meteoroid enters the Earth’s atmosphere, it burns up, making a streak of light called a meteor. Sometimes, a large meteoroid does not burn up completely, and it falls to Earth. When it lands, it’s called a meteorite. Why do meteors shoot by so suddenly? Meteoroids move fast! They hit the Eart ...
... When a meteoroid enters the Earth’s atmosphere, it burns up, making a streak of light called a meteor. Sometimes, a large meteoroid does not burn up completely, and it falls to Earth. When it lands, it’s called a meteorite. Why do meteors shoot by so suddenly? Meteoroids move fast! They hit the Eart ...
4 Asteroids, Comets, and Meteoroids
... Most meteoroids that enter Earth’s atmosphere burn up, but some larger meteoroids do not burn up completely. These meteoroids fall to Earth’s surface. A meteoroid that hits Earth’s surface is called a meteorite. Most meteorites are small. However, some meteorites strike Earth with the force of a lar ...
... Most meteoroids that enter Earth’s atmosphere burn up, but some larger meteoroids do not burn up completely. These meteoroids fall to Earth’s surface. A meteoroid that hits Earth’s surface is called a meteorite. Most meteorites are small. However, some meteorites strike Earth with the force of a lar ...
METEORITES Meteor Terminology METEORITES...
... A small rocky body of these asteroids make their way in space in size from in orbits toward the inner planets, microns to 10 meters including Earth and our Moon. When ...
... A small rocky body of these asteroids make their way in space in size from in orbits toward the inner planets, microns to 10 meters including Earth and our Moon. When ...
to a PDF document that explains more about the different
... A small rocky body of these asteroids make their way in space in size from in orbits toward the inner planets, microns to 10 meters including Earth and our Moon. When ...
... A small rocky body of these asteroids make their way in space in size from in orbits toward the inner planets, microns to 10 meters including Earth and our Moon. When ...
Ch11_Lecture
... minutes or less) and from the same general direction in the sky are called meteor showers • The point in the sky from which the meteors seem to emerge is called the ...
... minutes or less) and from the same general direction in the sky are called meteor showers • The point in the sky from which the meteors seem to emerge is called the ...
comet2
... Grazing the Sun Kamal Lodaya, The Institute of Mathematical Sciences, Chennai The famous astronomer Johannes Kepler found that the orbits of the planets around the Sun are not circular but elliptical. his discovery came from the study of the orbit of Mars (see article on Planets and their Orbits). K ...
... Grazing the Sun Kamal Lodaya, The Institute of Mathematical Sciences, Chennai The famous astronomer Johannes Kepler found that the orbits of the planets around the Sun are not circular but elliptical. his discovery came from the study of the orbit of Mars (see article on Planets and their Orbits). K ...
Chapter 10
... minutes or less) and from the same general direction in the sky are called meteor showers • The point in the sky from which the meteors seem to emerge is called the ...
... minutes or less) and from the same general direction in the sky are called meteor showers • The point in the sky from which the meteors seem to emerge is called the ...
What are Asteroids, Meteors and Comets? How are they similar
... planets causes asteroid orbits to slowly change Orbital changes can lead asteroids to collide with one another; increasing the likelihood of further collisions Collisions create smaller asteroids and fragments. Some small fragments reach the earths surface as meteorites. ...
... planets causes asteroid orbits to slowly change Orbital changes can lead asteroids to collide with one another; increasing the likelihood of further collisions Collisions create smaller asteroids and fragments. Some small fragments reach the earths surface as meteorites. ...
Asteroids4 Feb Asteroids, Comets, Minor Planets • Understanding composition of solar system
... – Carbon‐rich (right). Formed in outer asteroid belt ...
... – Carbon‐rich (right). Formed in outer asteroid belt ...
Tunguska event
The Tunguska event was a large explosion that occurred near the Stony Tunguska River, in what is now Krasnoyarsk Krai, Russia, on the morning of June 30, 1908 (N.S.). The explosion over the sparsely populated Eastern Siberian Taiga flattened 2,000 km2 (770 sq mi) of forest and caused no known casualties. The cause of the explosion is generally thought to have been a meteor. It is classified as an impact event, even though no impact crater has been found; the meteor is thought to have burst in mid-air at an altitude of 5 to 10 kilometres (3 to 6 miles) rather than hit the surface of the Earth. Different studies have yielded varying estimates of the superbolide's size, on the order of 60 to 190 metres (197 to 623 feet), depending on whether the meteor was a comet or a denser asteroid. It is considered the largest impact event on Earth in recorded history.Since the 1908 event, there have been an estimated 1,000 scholarly papers (mainly in Russian) published on the Tunguska explosion. Many scientists have participated in Tunguska studies: the best known are Leonid Kulik, Yevgeny Krinov, Kirill Florensky, Nikolai Vladimirovich Vasiliev, and Wilhelm Fast. In 2013, a team of researchers led by Victor Kvasnytsya of the National Academy of Sciences of Ukraine published analysis results of micro-samples from a peat bog near the center of the affected area showing fragments that may be of meteoritic origin.Estimates of the energy of the air burst range from 30 megatons of TNT (130 PJ) to 10 and 15 megatons of TNT (42 and 63 PJ), depending on the exact height of burst estimated when the scaling-laws from the effects of nuclear weapons are employed. While more modern supercomputer calculations that include the effect of the object's momentum estimate that the airburst had an energy range from 3 to 5 megatons of TNT (13 to 21 PJ), and that simply more of this energy was focused downward than would be the case from a nuclear explosion.Using the 15 megaton nuclear explosion derived estimate is an energy about 1,000 times greater than that of the atomic bomb dropped on Hiroshima, Japan; roughly equal to that of the United States' Castle Bravo ground-based thermonuclear test detonation on March 1, 1954; and about two-fifths that of the Soviet Union's later Tsar Bomba (the largest nuclear weapon ever detonated).It is estimated that the Tunguska explosion knocked down some 80 million trees over an area of 2,150 square kilometres (830 sq mi), and that the shock wave from the blast would have measured 5.0 on the Richter scale. An explosion of this magnitude would be capable of destroying a large metropolitan area, but due to the remoteness of the location, no fatalities were documented. This event has helped to spark discussion of asteroid impact avoidance.