CHAPTER 1 Meteorites, Asteroids, and Comets
... – You learned that the solar system is filled with small particles called meteoroids, which can fall into Earth’s atmosphere at speeds of 10 to 40 km/s. – Friction with the air heats the meteoroids to glowing, and they vaporize as meteors streaking across the night sky. – If a meteoroid is big and s ...
... – You learned that the solar system is filled with small particles called meteoroids, which can fall into Earth’s atmosphere at speeds of 10 to 40 km/s. – Friction with the air heats the meteoroids to glowing, and they vaporize as meteors streaking across the night sky. – If a meteoroid is big and s ...
Evolution of Comets Into Asteroids - SwRI Boulder
... to objects being classified as both types, in particular when coma was discovered long after the object had been catalogued as an asteroid. The most notable case is the Centaur asteroid 2060 Chiron, which is also known as comet 95P/Chiron. In addition, this scheme has led to Kuiper belt objects bein ...
... to objects being classified as both types, in particular when coma was discovered long after the object had been catalogued as an asteroid. The most notable case is the Centaur asteroid 2060 Chiron, which is also known as comet 95P/Chiron. In addition, this scheme has led to Kuiper belt objects bein ...
Generation of Low-Frequency Electric and Magnetic Fields During
... The effect of the shock polarization and its manifestation for the large-scale explosions considered there. The physical mechanism of the polarization of the heterogeneous medium at the shock wave front is conditioned by the formation of the dipole moments near the shear cracks and emptiness and inc ...
... The effect of the shock polarization and its manifestation for the large-scale explosions considered there. The physical mechanism of the polarization of the heterogeneous medium at the shock wave front is conditioned by the formation of the dipole moments near the shear cracks and emptiness and inc ...
Evolutionary Catastrophes: The Science of Mass Extinction
... Earth sixty-five million years ago? Throughout the history of life, a small number of catastrophic events have caused mass extinction and changed the path of evolution forever. Two main theories have emerged to account for these dramatic events: asteroid impact and massive volcanic eruptions, both le ...
... Earth sixty-five million years ago? Throughout the history of life, a small number of catastrophic events have caused mass extinction and changed the path of evolution forever. Two main theories have emerged to account for these dramatic events: asteroid impact and massive volcanic eruptions, both le ...
Asteroids, Meteorites, and Comets
... the largest of the planets from the background of stars, a culture has developed that thinks of the solar system as a Sun orbited by planets. Increasingly, as observers’ abilities to see smaller and smaller bodies in the solar system improves because of better instrumentation, and as scientists cont ...
... the largest of the planets from the background of stars, a culture has developed that thinks of the solar system as a Sun orbited by planets. Increasingly, as observers’ abilities to see smaller and smaller bodies in the solar system improves because of better instrumentation, and as scientists cont ...
Professor Comet: April, 2017
... The coma can reach from a few thousands and up to over 2 million km across (example: 17P/Holmes) The tails can extend past 900 000 km in length can could theoretically extend up to 1 AU! The material from the dust tail is the primary, but not the only source of micrometeroids for meteor shower ...
... The coma can reach from a few thousands and up to over 2 million km across (example: 17P/Holmes) The tails can extend past 900 000 km in length can could theoretically extend up to 1 AU! The material from the dust tail is the primary, but not the only source of micrometeroids for meteor shower ...
Gombosi2014 - Laboratory for Atmospheric and Space Physics
... “solar corpuscular radiation” (solar wind). Assuming that the antisunward acceleration of small irregularities in Type I comet tails were due to collisional coupling between a radially outward plasma flow from the Sun and newly ionized cometary particles Biermann [1951] inferred a solar wind density ...
... “solar corpuscular radiation” (solar wind). Assuming that the antisunward acceleration of small irregularities in Type I comet tails were due to collisional coupling between a radially outward plasma flow from the Sun and newly ionized cometary particles Biermann [1951] inferred a solar wind density ...
PPT
... – They strike Earth every 6000 years or so • A recent close call – There was an explosion over the Mediterranean on June 6, 2002 (a 10-meter sized asteroid) • Have probably found all objects larger than 1km, so probably no global effects without advance warning ...
... – They strike Earth every 6000 years or so • A recent close call – There was an explosion over the Mediterranean on June 6, 2002 (a 10-meter sized asteroid) • Have probably found all objects larger than 1km, so probably no global effects without advance warning ...
Etymology - Link Observatory
... more strongly affected by the solar wind than is dust, following magnetic field lines rather than an orbital trajectory. On occasions a short tail pointing in the opposite direction to the ion and dust tails may be seen – the antitail. These were once thought somewhat mysterious but are merely the e ...
... more strongly affected by the solar wind than is dust, following magnetic field lines rather than an orbital trajectory. On occasions a short tail pointing in the opposite direction to the ion and dust tails may be seen – the antitail. These were once thought somewhat mysterious but are merely the e ...
Professor Comet: March, 2017
... Kuiper Belt (short to medium period comets) to the Oort Cloud (up to extremely long period comets). The details in composition and overall structure internal and external vary considerably and they range in size from 100m to 40 km across! As of June 2013 there are about 4300 known so far, but they m ...
... Kuiper Belt (short to medium period comets) to the Oort Cloud (up to extremely long period comets). The details in composition and overall structure internal and external vary considerably and they range in size from 100m to 40 km across! As of June 2013 there are about 4300 known so far, but they m ...
asteroid deflection by means of electromagnetic forces during
... carried out simulations assuming the impulsive manoeuvre is provided by a spacecraft traveling along the asteroid’s orbit in opposite direction. The results show the maximum deflection achieved impacting at the distance of the sphere of influence is between one and two orders of magnitude greater th ...
... carried out simulations assuming the impulsive manoeuvre is provided by a spacecraft traveling along the asteroid’s orbit in opposite direction. The results show the maximum deflection achieved impacting at the distance of the sphere of influence is between one and two orders of magnitude greater th ...
On the chaotic orbit of comet 29P/Schwassmann
... (Cochran et al., 2000; Cochran, 2002; Korsun et al., 2008; Ivanova et al., 2016). We cannot exclude either the CO2 variant as a source of the comet activity. But the abundance of gaseous CO2 appears to be much lower than that of CO, as shown by Woodney & Fernandez (2006) who used the Spitzer in a se ...
... (Cochran et al., 2000; Cochran, 2002; Korsun et al., 2008; Ivanova et al., 2016). We cannot exclude either the CO2 variant as a source of the comet activity. But the abundance of gaseous CO2 appears to be much lower than that of CO, as shown by Woodney & Fernandez (2006) who used the Spitzer in a se ...
High-velocity collisions from the lunar cataclysm recorded in
... circular and nearly co-planar orbits between 5.4 and 11.7 au, as determined by gas giant evolution models24,37 . We assumed they kept these orbits between 4.1 and 4.55 Gyr ago. Into this system, test asteroids were placed on non-planet-crossing orbits between 1.7 and 3.5 au, with all objects having ...
... circular and nearly co-planar orbits between 5.4 and 11.7 au, as determined by gas giant evolution models24,37 . We assumed they kept these orbits between 4.1 and 4.55 Gyr ago. Into this system, test asteroids were placed on non-planet-crossing orbits between 1.7 and 3.5 au, with all objects having ...
PDF only - at www.arxiv.org.
... 1 INTRODUCTION The space environment contains dust, i.e. meteoroids and orbital debris. Meteoroids are natural interplanetary particles with mostly cometary and asteroidal origin, while fragments originating from manmade objects placed in orbit are referred to as debris. Meteoroids and debris, whose ...
... 1 INTRODUCTION The space environment contains dust, i.e. meteoroids and orbital debris. Meteoroids are natural interplanetary particles with mostly cometary and asteroidal origin, while fragments originating from manmade objects placed in orbit are referred to as debris. Meteoroids and debris, whose ...
3. Meteorites and Asteroids
... vaporized material as their surfaces heat by friction with the air. Many meteors burn up entirely before they reach the surface. Planets with thin atmospheres, like Mars, or none at all, like the Moon, are struck by a much larger proportion of the small meteoroids that pass them in space. Impact of ...
... vaporized material as their surfaces heat by friction with the air. Many meteors burn up entirely before they reach the surface. Planets with thin atmospheres, like Mars, or none at all, like the Moon, are struck by a much larger proportion of the small meteoroids that pass them in space. Impact of ...
Here - ScienceA2Z.com
... sun, solar energy begins to heat the ice and vaporize it. The gas flies off the comet, sometimes violently enough to break the nucleus apart, and throws dust up with it. The gases form a cloud around the nucleus called the coma. Some of the gas is stripped of electrons and blown back by the solar wi ...
... sun, solar energy begins to heat the ice and vaporize it. The gas flies off the comet, sometimes violently enough to break the nucleus apart, and throws dust up with it. The gases form a cloud around the nucleus called the coma. Some of the gas is stripped of electrons and blown back by the solar wi ...
Family Space Day Overview - Comets
... and 1682 had essentially the same orbits and thus were a single comet. Based on his calculations, he correctly predicted the comet's return in 1758, but unfortunately, he did not live to see Comet Halley. Sometimes more than one person reports a new comet at the same time. In that case, the names ar ...
... and 1682 had essentially the same orbits and thus were a single comet. Based on his calculations, he correctly predicted the comet's return in 1758, but unfortunately, he did not live to see Comet Halley. Sometimes more than one person reports a new comet at the same time. In that case, the names ar ...
Here - ScienceA2Z.com
... sun, solar energy begins to heat the ice and vaporize it. The gas flies off the comet, sometimes violently enough to break the nucleus apart, and throws dust up with it. The gases form a cloud around the nucleus called the coma. Some of the gas is stripped of electrons and blown back by the solar wi ...
... sun, solar energy begins to heat the ice and vaporize it. The gas flies off the comet, sometimes violently enough to break the nucleus apart, and throws dust up with it. The gases form a cloud around the nucleus called the coma. Some of the gas is stripped of electrons and blown back by the solar wi ...
Strange Lights in the Sky - Beck-Shop
... with a fuzzy, starlike head and a long tail skirting upward and to the left. This was my first look at Comet West, the first look of many. To someone who lived his whole life to that point on a “2-D planet,” like most of us beset by issues of daily life, this was a dose of sudden magic. Who knew that ...
... with a fuzzy, starlike head and a long tail skirting upward and to the left. This was my first look at Comet West, the first look of many. To someone who lived his whole life to that point on a “2-D planet,” like most of us beset by issues of daily life, this was a dose of sudden magic. Who knew that ...
There are three main classes of meteorites:
... Meteorites are rocks from space, and the same techniques that geologists use to investigate Earth rocks are used to investigate meteorites. One of the basic techniques is to saw a thin slice off the rock with a diamond saw, stick it to a glass slide, and grind it so thin that light can pass through. ...
... Meteorites are rocks from space, and the same techniques that geologists use to investigate Earth rocks are used to investigate meteorites. One of the basic techniques is to saw a thin slice off the rock with a diamond saw, stick it to a glass slide, and grind it so thin that light can pass through. ...
Comet Facts, Myths, and Legends
... period of naked-eye visibility: an astonishing 19 months. It will not appear again for another 2,400 years. ...
... period of naked-eye visibility: an astonishing 19 months. It will not appear again for another 2,400 years. ...
name those asteroids!
... Most meteorites are thought to be broken fragments of asteroids — small “planets” or bodies of rock or ice orbiting around the Sun. The largest asteroid is Ceres, 940 km in diameter, much smaller than our Moon (3,500 km). Ceres was the first asteroid discovered (in 1801), and about 6,000 have been d ...
... Most meteorites are thought to be broken fragments of asteroids — small “planets” or bodies of rock or ice orbiting around the Sun. The largest asteroid is Ceres, 940 km in diameter, much smaller than our Moon (3,500 km). Ceres was the first asteroid discovered (in 1801), and about 6,000 have been d ...
Introduction to Comets - Mr. Hill`s Science Website
... astronomers Lewis Swift and Horace Tuttle. As Comet Swift-Tuttle moves closer to the Sun every 120 years, it leaves behind a trail of dust debris that provides the ingredients for a spectacular fireworks display seen in July and August. As Earth passes through the remnants of this dust tail, we can ...
... astronomers Lewis Swift and Horace Tuttle. As Comet Swift-Tuttle moves closer to the Sun every 120 years, it leaves behind a trail of dust debris that provides the ingredients for a spectacular fireworks display seen in July and August. As Earth passes through the remnants of this dust tail, we can ...
Discovery
... Near-Earth Asteroids (NEAs) – Asteroids with orbits that bring them within 1.3 AU of the Sun are referred to as Near-Earth Asteroids (together with the comets whose orbits take them through near-Earth space form the Near-Earth Objects or NEOs). Asteroids that actually cross Earth’s orbital path are ...
... Near-Earth Asteroids (NEAs) – Asteroids with orbits that bring them within 1.3 AU of the Sun are referred to as Near-Earth Asteroids (together with the comets whose orbits take them through near-Earth space form the Near-Earth Objects or NEOs). Asteroids that actually cross Earth’s orbital path are ...
What are comets?
... planets adding to their water and rock Some believe that material from comets may have brought water to Earth through impacts. ...
... planets adding to their water and rock Some believe that material from comets may have brought water to Earth through impacts. ...
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.