Questions about Comets: Created by Laura Vican, 2014 Q: What are
... Q: What are comets made of? A: Mostly water and dirt. They also have trace amounts of sugar (the corn syrup), nitrogen (the ammonia; NH4), and dry ice (frozen CO2). We believe that comets brought these materials to Earth early on in the formation of our solar system (~4.5 billion years ago). The wat ...
... Q: What are comets made of? A: Mostly water and dirt. They also have trace amounts of sugar (the corn syrup), nitrogen (the ammonia; NH4), and dry ice (frozen CO2). We believe that comets brought these materials to Earth early on in the formation of our solar system (~4.5 billion years ago). The wat ...
Eris - Rob Walrecht
... object in orbit around the Sun and at least 500 km in diameter easily meets the conditions. We already know several, like Quaoar, Orcus and Sedna. Eris is also a member of the ‘Scattered Disc Objects’ (SDO’s), objects with chaotic, excentric and inclined orbits, ranging from the outer Kuiper Belt to ...
... object in orbit around the Sun and at least 500 km in diameter easily meets the conditions. We already know several, like Quaoar, Orcus and Sedna. Eris is also a member of the ‘Scattered Disc Objects’ (SDO’s), objects with chaotic, excentric and inclined orbits, ranging from the outer Kuiper Belt to ...
UP8.LP2.OtherCelestialBodies
... after moons. Asteroids are rocky bodies that revolve around the Sun. Asteroids vary in shapes and sizes but are mostly made of iron, nickel, and stone. Most asteroids in the solar system can be found between Mars and Jupiter – this is called the asteroid belt. ...
... after moons. Asteroids are rocky bodies that revolve around the Sun. Asteroids vary in shapes and sizes but are mostly made of iron, nickel, and stone. Most asteroids in the solar system can be found between Mars and Jupiter – this is called the asteroid belt. ...
The Minor Planets
... Our view of the Solar System has changed dramatically over the past 15 years with the discovery of new classes of small bodies. Minor planets are another name for asteroids, or celestial bodies that orbit the Sun that are not otherwise classed as planets or comets. Generally, minor planets are relat ...
... Our view of the Solar System has changed dramatically over the past 15 years with the discovery of new classes of small bodies. Minor planets are another name for asteroids, or celestial bodies that orbit the Sun that are not otherwise classed as planets or comets. Generally, minor planets are relat ...
Today in Astronomy 111: asteroids, perturbations and orbital
... an object, such as the nearby passage of a planet, will add up if they are in phase with the orbital motion of the object. If there are out of phase, then the perturbations will cancel on average and there will be no net change in the orbit of the object. 4 October 2011 ...
... an object, such as the nearby passage of a planet, will add up if they are in phase with the orbital motion of the object. If there are out of phase, then the perturbations will cancel on average and there will be no net change in the orbit of the object. 4 October 2011 ...
Interesting Science Facts - Comets
... Comets always have irregular shapes due to the fact that they have low mass so they cannot become spherical under their own gravity. ...
... Comets always have irregular shapes due to the fact that they have low mass so they cannot become spherical under their own gravity. ...
FIT_colloq_2nov2012
... The IAU therefore resolves that planets and other bodies in our Solar System, except satellites, be defined into three distinct categories in the following way: (1) A “planet” is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body ...
... The IAU therefore resolves that planets and other bodies in our Solar System, except satellites, be defined into three distinct categories in the following way: (1) A “planet” is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body ...
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% ...
Seminar topics - Studentportalen
... (minimum distance between the two orbits in space) • If the timing is not “perfect”, the actual miss distance may be larger ...
... (minimum distance between the two orbits in space) • If the timing is not “perfect”, the actual miss distance may be larger ...
Study Guide for 1ST Astronomy Exam
... List all the motions of the Earth; Rotation on a tilted axis and revolution about the Sun with the time scales and degree of tilt. o The calculation of true orbital periods. Saturn is in opposition on 2013/04/28 and again on 2014/05/10. There are 378 days between these two oppositions. Knowing t ...
... List all the motions of the Earth; Rotation on a tilted axis and revolution about the Sun with the time scales and degree of tilt. o The calculation of true orbital periods. Saturn is in opposition on 2013/04/28 and again on 2014/05/10. There are 378 days between these two oppositions. Knowing t ...
Solar system - Institute of Astronomy
... Minor planets in the inner solar sytem • The Asteroid Belt is the belt of rocky asteroids orbiting 2-3.5 AU from the Sun (green) ...
... Minor planets in the inner solar sytem • The Asteroid Belt is the belt of rocky asteroids orbiting 2-3.5 AU from the Sun (green) ...
The Solar System - Solon City Schools
... gravitational pull within our solar system. *Since planets have inertia, they do not get pulled into the sun. *Gravity keeps the planets in orbit. ...
... gravitational pull within our solar system. *Since planets have inertia, they do not get pulled into the sun. *Gravity keeps the planets in orbit. ...
The Inner Planets
... The Asteroid Belt is a region between the inner planets and outer planets (betenn Mars and Jupiter) where thousands of asteroids are found orbiting around the Sun. More than 7000 asteroids have been discovered. Several hundred more are discovered each year. There are undoubtedly hundreds of thousand ...
... The Asteroid Belt is a region between the inner planets and outer planets (betenn Mars and Jupiter) where thousands of asteroids are found orbiting around the Sun. More than 7000 asteroids have been discovered. Several hundred more are discovered each year. There are undoubtedly hundreds of thousand ...
Why is Pluto no longer a planet
... A dwarf planet is a celestial body that is in orbit around the Sun, is massive enough for its own gravity to make it round, is not a moon but has not cleared the neighbourhood around its orbit. The latter point means that there are bodies of a similar size in the orbit of the dwarf planet. For examp ...
... A dwarf planet is a celestial body that is in orbit around the Sun, is massive enough for its own gravity to make it round, is not a moon but has not cleared the neighbourhood around its orbit. The latter point means that there are bodies of a similar size in the orbit of the dwarf planet. For examp ...
ASTR 150
... Scientists now believe that the crater was created approximately 50,000 years ago. The meteorite which made it was composed almost entirely of nickel-iron, suggesting that it may have originated in the interior of a small planet. It was 150 feet across, weighed roughly 300,000 tons, and was travelin ...
... Scientists now believe that the crater was created approximately 50,000 years ago. The meteorite which made it was composed almost entirely of nickel-iron, suggesting that it may have originated in the interior of a small planet. It was 150 feet across, weighed roughly 300,000 tons, and was travelin ...
Sorting the Solar System
... Eris is a Dwarf Planet with a moon called Dysnomia. It is more massive than Pluto and orbits the Sun three times farther. It was discovered in 2005 and caused a stir after initially being described as the 10th planet. Eros was the first near-Earth asteroid discovered. It is also one of the largest. ...
... Eris is a Dwarf Planet with a moon called Dysnomia. It is more massive than Pluto and orbits the Sun three times farther. It was discovered in 2005 and caused a stir after initially being described as the 10th planet. Eros was the first near-Earth asteroid discovered. It is also one of the largest. ...
Lecture12-ASTA01
... • The division of the planets into two families is a clue to how our solar system formed. • The present properties of individual planets, however, don’t reveal everything you need to know about their origins. • The planets have all evolved since they formed. • For further clues, you can look at smal ...
... • The division of the planets into two families is a clue to how our solar system formed. • The present properties of individual planets, however, don’t reveal everything you need to know about their origins. • The planets have all evolved since they formed. • For further clues, you can look at smal ...
Pluto and Solar System Debris
... New close-up images of a region near Pluto’s equator reveal a giant surprise: a range of youthful mountains rising as high as 11,000 feet (3,500 meters) above the surface of the icy body. Although methane and nitrogen ice covers much of the surface of Pluto, these materials are not strong enough to ...
... New close-up images of a region near Pluto’s equator reveal a giant surprise: a range of youthful mountains rising as high as 11,000 feet (3,500 meters) above the surface of the icy body. Although methane and nitrogen ice covers much of the surface of Pluto, these materials are not strong enough to ...
pptx format - Hildas and Trojans
... Objects with a slightly different periods would not be in resonance with Jupiter. These objects would soon happen to get close to Jupiter and be scattered out of their orbits. Hildas are in a protective resonance. They sometimes get near radius of Jupiter’s orbit, but the resonance ensures that Jupi ...
... Objects with a slightly different periods would not be in resonance with Jupiter. These objects would soon happen to get close to Jupiter and be scattered out of their orbits. Hildas are in a protective resonance. They sometimes get near radius of Jupiter’s orbit, but the resonance ensures that Jupi ...
Introduction to Astronomy
... comets never come close to the Sun. Of all the orbits shown, only the most elongated ellipse represents a comet that will actually enter the solar system (which is smaller than the dot at the center of the figure on this scale) and possibly become visible from Earth. (b)The Kuiper belt, the source o ...
... comets never come close to the Sun. Of all the orbits shown, only the most elongated ellipse represents a comet that will actually enter the solar system (which is smaller than the dot at the center of the figure on this scale) and possibly become visible from Earth. (b)The Kuiper belt, the source o ...
The Role of Comets in the Late Heavy Bombardment
... since comets did not cause too much cratering • Is there posi>ve evidence that comets did contribute to the LHB in the way predicted by a late planet instability? (Marty et al. 2016: Earth’s Ar ...
... since comets did not cause too much cratering • Is there posi>ve evidence that comets did contribute to the LHB in the way predicted by a late planet instability? (Marty et al. 2016: Earth’s Ar ...
Estimating how often Mass Extinctions due to Impacts Occur on the
... and dwarf planets. Most asteroids are rocky fragments that orbit in the space between Mars and Jupiter. Small asteroids are sometimes called meteoroids. Comets are dirty snowballs that show beautiful tails of gas and dust as they approach the sun. Dwarf planets include Pluto and large asteroids that ...
... and dwarf planets. Most asteroids are rocky fragments that orbit in the space between Mars and Jupiter. Small asteroids are sometimes called meteoroids. Comets are dirty snowballs that show beautiful tails of gas and dust as they approach the sun. Dwarf planets include Pluto and large asteroids that ...
Power Point - Solar System
... All other objects, except satellites, orbiting the Sun. Examples – Comets, Asteroids, Meteoroids, Kuiper ...
... All other objects, except satellites, orbiting the Sun. Examples – Comets, Asteroids, Meteoroids, Kuiper ...
Review 2 (October 19-10)
... • Oort Cloud (spherical shell ~ 50,000-100,000 AU) • Kuiper Belt (disk ~ 30-50 AU) (Astronomical Unit [AU] = Earth-Sun Distance) ...
... • Oort Cloud (spherical shell ~ 50,000-100,000 AU) • Kuiper Belt (disk ~ 30-50 AU) (Astronomical Unit [AU] = Earth-Sun Distance) ...
Near-Earth object
A near-Earth object (NEO) is a small Solar System body whose orbit brings it into proximity with Earth. All NEOs have a closest approach to the Sun (perihelion) of less than 1.3 astronomical unit (AU). They include about thirteen thousand near-Earth asteroids (NEAs), more than one hundred near-Earth comets (NECs), and a number of solar-orbiting spacecraft and meteoroids, large enough to be tracked in space before striking the Earth. It is now widely accepted that collisions in the past have had a significant role in shaping the geological and biological history of the planet. NEOs have become of increased interest since the 1980s because of increased awareness of the potential danger some of the asteroids or comets pose to Earth, and active mitigations are being researched.NEAs have orbits that lie partly between 0.983 and 1.3 AU away from the Sun. When an NEA is detected it is submitted to the IAU's Minor Planet Center for cataloging. Some NEAs ' orbits intersect that of Earth's so they pose a collision danger. The United States, European Union, and other nations are currently scanning for NEOs in an effort called Spaceguard.In the United States, NASA has a congressional mandate to catalogue all NEOs that are at least 1 kilometer wide, as the impact of such an object would be catastrophic. As of June 2015, there have been 872 NEAs larger than 1 km discovered, of which 153 are potentially hazardous. It was estimated in 2006 that 20% of the mandated objects have not yet been found. As a result of NEOWISE in 2011, it is estimated that 93% of the NEAs larger than 1 km have been found and that only about 70 remain to be discovered. Our inventory is much less complete for smaller objects, which still have potential for large scale damage.Potentially hazardous objects (PHOs) are currently defined based on parameters that measure the object's potential to make threatening close approaches to the Earth. Mostly objects with an Earth minimum orbit intersection distance (MOID) of 0.05 AU or less and an absolute magnitude (H) of 22.0 or brighter (a rough indicator of large size) are considered PHOs. Objects that cannot approach closer to the Earth (i.e. MOID) than 0.05 AU (7,500,000 km; 4,600,000 mi), or are smaller than about 150 m (500 ft) in diameter (i.e. H = 22.0 with assumed albedo of 13%), are not considered PHOs. The NASA Near Earth Object Catalog also includes the approach distances of asteroids and comets measured in lunar distances, and this usage has become a common unit of measure used by the news media in discussing these objects.Some NEOs are of high interest because they can be physically explored with lower mission velocity even than the Moon, due to their combination of low velocity with respect to Earth (ΔV) and small gravity, so they may present interesting scientific opportunities both for direct geochemical and astronomical investigation, and as potentially economical sources of extraterrestrial materials for human exploitation. This makes them an attractive target for exploration. As of 2012, three near-Earth objects have been visited by spacecraft: 433 Eros, by NASA's Near Earth Asteroid Rendezvous probe, 25143 Itokawa, by the JAXA Hayabusa mission, and 4179 Toutatis, by CNSA's Chang'e 2 spacecraft.