Asteroids Comets Meteor Showers
... followed by others. Referred to as planets, until realized that there was a large number of these. First thought to be debris from a destroyed planet. Eventually realized mass in Asteroid Belt too small for this. ...
... followed by others. Referred to as planets, until realized that there was a large number of these. First thought to be debris from a destroyed planet. Eventually realized mass in Asteroid Belt too small for this. ...
Counting Comets
... Some worry that a celestial intruder such as this may one day collide with Earth, causing a massive geological and biological upheaval. Indeed, scientists believe that an asteroid or series of meteor impacts some 65 million years ago resulted in major climate changes and the extinction of the dinosa ...
... Some worry that a celestial intruder such as this may one day collide with Earth, causing a massive geological and biological upheaval. Indeed, scientists believe that an asteroid or series of meteor impacts some 65 million years ago resulted in major climate changes and the extinction of the dinosa ...
Kohoutek Is Coming - Institute of Current World Affairs
... larly visible to the naked eye for about six weeks before and after that ...
... larly visible to the naked eye for about six weeks before and after that ...
supplemental educational materials PDF
... pass by the Sun only once or that repeatedly bring them through the solar system (as in the 76-year orbit of Halley’s Comet). A comet’s “signature” long, glowing tail Continued … ...
... pass by the Sun only once or that repeatedly bring them through the solar system (as in the 76-year orbit of Halley’s Comet). A comet’s “signature” long, glowing tail Continued … ...
Chart_set_4
... have significant gravity. Mutual attraction accelerates accretion. Bigger objects grow faster => a few planet-sized objects. ...
... have significant gravity. Mutual attraction accelerates accretion. Bigger objects grow faster => a few planet-sized objects. ...
Comets - Helios
... Rosetta (2004) -- will land a probe on the nucleus of Comet 67P/Churyumov-Gerasimenko (2014) ...
... Rosetta (2004) -- will land a probe on the nucleus of Comet 67P/Churyumov-Gerasimenko (2014) ...
File
... mostly of ice and dust coated with dark organic material, with the ice composed mainly of frozen water but perhaps other frozen substances as well, such as ammonia, carbon dioxide, carbon monoxide and methane. The nucleus might have a small rocky core. ...
... mostly of ice and dust coated with dark organic material, with the ice composed mainly of frozen water but perhaps other frozen substances as well, such as ammonia, carbon dioxide, carbon monoxide and methane. The nucleus might have a small rocky core. ...
what is a comet? - Fireballs in the sky
... tail itself is often split into two; a bright dust tail which curves slightly behind the comet and the faint gas tail which always points directly away from the sun. This occurs because the dust particles are less affected by the solar wind than the lighter gas particles. HOW BIG ARE COMETS? The sol ...
... tail itself is often split into two; a bright dust tail which curves slightly behind the comet and the faint gas tail which always points directly away from the sun. This occurs because the dust particles are less affected by the solar wind than the lighter gas particles. HOW BIG ARE COMETS? The sol ...
The Solar System (Planetary Debris) - NATSCI-A7
... quickly decelerated to a few hundred km/hour by atmospheric friction and hit the Earth's surface with very little fanfare. However meteoroids larger than a few hundred tons are slowed very little; only these large (and fortunately rare) ones make craters. ...
... quickly decelerated to a few hundred km/hour by atmospheric friction and hit the Earth's surface with very little fanfare. However meteoroids larger than a few hundred tons are slowed very little; only these large (and fortunately rare) ones make craters. ...
Lecture18 - UCSB Physics
... • A) Comet orbits are mostly circular and in the ecliptic plane, whereas asteroids have elliptical orbits inclined at random to the ecliptic plane • B) Comets never approach closer to the Sun than approximately Jupiter’s orbit, whereas some asteroids approach very close to the Sun • C) Asteroids orb ...
... • A) Comet orbits are mostly circular and in the ecliptic plane, whereas asteroids have elliptical orbits inclined at random to the ecliptic plane • B) Comets never approach closer to the Sun than approximately Jupiter’s orbit, whereas some asteroids approach very close to the Sun • C) Asteroids orb ...
Lecture18
... •A) Comet orbits are mostly circular and in the ecliptic plane, whereas asteroids have elliptical orbits inclined at random to the ecliptic plane •B) Comets never approach closer to the Sun than approximately Jupiter’s orbit, whereas some asteroids approach very close to the Sun •C) Asteroids orbit ...
... •A) Comet orbits are mostly circular and in the ecliptic plane, whereas asteroids have elliptical orbits inclined at random to the ecliptic plane •B) Comets never approach closer to the Sun than approximately Jupiter’s orbit, whereas some asteroids approach very close to the Sun •C) Asteroids orbit ...
Asteroids, meteorites, and comets
... The outer edge of our Solar System is not empty. There are many, many huge spheres of ice and rock out near Pluto's orbit. Astronomers call this huge group of planetoids "Kuiper Belt Objects", or "KBOs" for short. The Kuiper Belt is a bit like the asteroid belt, but much farther from the Sun. See ho ...
... The outer edge of our Solar System is not empty. There are many, many huge spheres of ice and rock out near Pluto's orbit. Astronomers call this huge group of planetoids "Kuiper Belt Objects", or "KBOs" for short. The Kuiper Belt is a bit like the asteroid belt, but much farther from the Sun. See ho ...
comets
... When heated by sunlight, gases sublimate and produce atmosphere surrounding the nucleus ...
... When heated by sunlight, gases sublimate and produce atmosphere surrounding the nucleus ...
Comet Observers Club Chair
... coma: dense cloud of water, carbon dioxide and other neutral gases sublimed from the nucleus; dust tail: up to 10 million km long composed of smoke-sized dust particles driven off the nucleus by escaping gases; this is the most prominent part of a comet to the unaided eye; ...
... coma: dense cloud of water, carbon dioxide and other neutral gases sublimed from the nucleus; dust tail: up to 10 million km long composed of smoke-sized dust particles driven off the nucleus by escaping gases; this is the most prominent part of a comet to the unaided eye; ...
The Edge of the Solar System The Oort Cloud
... 12 comets per year leave Oort Cloud to become long-range comets o Pushed out by large molecular clouds, passing stars, or tidal interactions with Milky Way's disc o 5 of these enter inner solar system per year o It takes thousands of years for them to orbit the sun ...
... 12 comets per year leave Oort Cloud to become long-range comets o Pushed out by large molecular clouds, passing stars, or tidal interactions with Milky Way's disc o 5 of these enter inner solar system per year o It takes thousands of years for them to orbit the sun ...
Comets, Meteors, and Asteroids Oh My!! Terms
... • A comets tail ALWAYS points away from the sun ...
... • A comets tail ALWAYS points away from the sun ...
File
... 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 due to the solar winds (movement of heat away from sun) ...
... 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 due to the solar winds (movement of heat away from sun) ...
Comets
... Some comets make many revolutions around the sun. The most famous returning comet is Halley's Comet. It revolves around the sun once every 76 years. It was named for Edmund Halley who discovered it in 1682. Its orbit of about 11 billion kilometers takes it just past Neptune. The tail of Halley's Com ...
... Some comets make many revolutions around the sun. The most famous returning comet is Halley's Comet. It revolves around the sun once every 76 years. It was named for Edmund Halley who discovered it in 1682. Its orbit of about 11 billion kilometers takes it just past Neptune. The tail of Halley's Com ...
Comets…
... Comets – they do NOT flash across the sky! Asteroids: small objects in orbit around the sun between Mars and Jupiter , seen only with telescopes Kuiper Belt Objects (KBOs): small objects orbiting on the outer fringe of ...
... Comets – they do NOT flash across the sky! Asteroids: small objects in orbit around the sun between Mars and Jupiter , seen only with telescopes Kuiper Belt Objects (KBOs): small objects orbiting on the outer fringe of ...
DEEP IMPACT and ROSETTA
... Problem: D/H ratio of ocean water differs from (barely known) D/H ratio of comets way-around: mixing of 2 or more sources with different D/H ratio, cometary source would have contributed about 30% ...
... Problem: D/H ratio of ocean water differs from (barely known) D/H ratio of comets way-around: mixing of 2 or more sources with different D/H ratio, cometary source would have contributed about 30% ...
Comet Catalina 2016 - Fraser Heights Chess Club
... at the end of the Big Dipper's handle • January 16 — Passes 2° southwest of the 8thmagnitude galaxy, M101 • January 17 — Passes 3.4° northeast of the double star Mizar in the bend of the Big Dipper's handle ...
... at the end of the Big Dipper's handle • January 16 — Passes 2° southwest of the 8thmagnitude galaxy, M101 • January 17 — Passes 3.4° northeast of the double star Mizar in the bend of the Big Dipper's handle ...
Comet
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.