Document
... Discovery of Asteroids • Ceres discovered in 1801 – by Piazzi – thought it was “missing planet” – more discovered later • 300 known by 1890 • today >10,000 known ...
... Discovery of Asteroids • Ceres discovered in 1801 – by Piazzi – thought it was “missing planet” – more discovered later • 300 known by 1890 • today >10,000 known ...
Slide 1
... C-type, includes more than 75% of known asteroids: extremely dark (albedo 0.03); similar to carbonaceous chondrite meteorites; approximately the same chemical composition as the Sun minus hydrogen, helium and other volatiles S-type, 17%: relatively bright (albedo .10-.22); metallic nickeliron mixed ...
... C-type, includes more than 75% of known asteroids: extremely dark (albedo 0.03); similar to carbonaceous chondrite meteorites; approximately the same chemical composition as the Sun minus hydrogen, helium and other volatiles S-type, 17%: relatively bright (albedo .10-.22); metallic nickeliron mixed ...
Whipple: Exploring the Solar System Beyond Neptune Using a
... Dones et al. (2004a) also made clear the deep heritage of their work, encompassing a broad effort in this community. ...
... Dones et al. (2004a) also made clear the deep heritage of their work, encompassing a broad effort in this community. ...
ACTIVE ACCRETION——An Active Learning Game on Solar
... During this phase of formation, dust grains formed condensation nuclei around which matter began to accumulate. This vital step accelerated the critical process of forming the first small clumps of matter, which then start to collide with each other at low velocities. The particles eventually stick ...
... During this phase of formation, dust grains formed condensation nuclei around which matter began to accumulate. This vital step accelerated the critical process of forming the first small clumps of matter, which then start to collide with each other at low velocities. The particles eventually stick ...
Activity 3 Orbits and Effects
... the course of about 100,000 years, the Earth’s orbit ranges from nearly circular (very close to zero eccentricity) to more elliptical (with an eccentricity of about 0.05). Planetary scientists have found that some solar-system objects have highly elliptical orbits. Comets are a well-known example.As ...
... the course of about 100,000 years, the Earth’s orbit ranges from nearly circular (very close to zero eccentricity) to more elliptical (with an eccentricity of about 0.05). Planetary scientists have found that some solar-system objects have highly elliptical orbits. Comets are a well-known example.As ...
Probabilities of Collisions of Migrating Bodies and Dust Particles
... The larger value of P for Earth we have calculated compared to those argued by Morbidelli et al. [2000] (P (1-3)10-6) and Levison et al. [2001] (P = 410-7 ) is caused by the fact that in our runs we considered a larger number of Jupiter-crossing objects and the main portion of the probability of ...
... The larger value of P for Earth we have calculated compared to those argued by Morbidelli et al. [2000] (P (1-3)10-6) and Levison et al. [2001] (P = 410-7 ) is caused by the fact that in our runs we considered a larger number of Jupiter-crossing objects and the main portion of the probability of ...
Solar System Debris - Sierra College Astronomy Home Page
... • History: Bode’s Law and the “missing planet” • There are currently over 396,000 identified asteroids also known as minor planets. • Ceres, at 1,000 km (600 mi) in diameter, is the largest asteroid and makes up 30% of the mass of all asteroids. It large enough to be round and is therefore considere ...
... • History: Bode’s Law and the “missing planet” • There are currently over 396,000 identified asteroids also known as minor planets. • Ceres, at 1,000 km (600 mi) in diameter, is the largest asteroid and makes up 30% of the mass of all asteroids. It large enough to be round and is therefore considere ...
Objects in Space - Salem City Schools
... many years. When they are visible in the sky many flock to areas where a dark night sky is available(away from city lights). ...
... many years. When they are visible in the sky many flock to areas where a dark night sky is available(away from city lights). ...
PHAS 2B17 Physics of the Solar System
... planets extending from the orbit of Neptune (at 30 AU) to approximately 55 AU from the Sun. • It is similar to the asteroid belt, although it is far larger—20 times as wide and 20–200 times as massive. • Like the asteroid belt, it consists mainly of small bodies, or remnants from the Solar System's ...
... planets extending from the orbit of Neptune (at 30 AU) to approximately 55 AU from the Sun. • It is similar to the asteroid belt, although it is far larger—20 times as wide and 20–200 times as massive. • Like the asteroid belt, it consists mainly of small bodies, or remnants from the Solar System's ...
Comet - Physics
... • Have a close encounter with Neptune. • This can toss it into an orbit which goes from Neptune to the orbit of the terrestrial planets (like Earth). • Or, it could become a Centaur for awhile. ...
... • Have a close encounter with Neptune. • This can toss it into an orbit which goes from Neptune to the orbit of the terrestrial planets (like Earth). • Or, it could become a Centaur for awhile. ...
Comets - Images
... Comets have a small solid nucleus (few km across) made of ice. When they approach the Sun the ice starts to evaporate forming the coma, a halo around the nucleus of dust and gas. Radiation pressure from the Sun pushes some of this dust and gas outwards (away from the Sun) to form two tails - one str ...
... Comets have a small solid nucleus (few km across) made of ice. When they approach the Sun the ice starts to evaporate forming the coma, a halo around the nucleus of dust and gas. Radiation pressure from the Sun pushes some of this dust and gas outwards (away from the Sun) to form two tails - one str ...
Outer Space Vocabulary Solar System – The Sun and
... Gravity – A pulling force that acts between all objects in the universe. We are attracted to the earth by gravity. Weight – A measure of how much gravity pull on an object or body. It is measured in Newtons (N). Mass – The amount of matter in an object. It is measured in kilograms (kg). ...
... Gravity – A pulling force that acts between all objects in the universe. We are attracted to the earth by gravity. Weight – A measure of how much gravity pull on an object or body. It is measured in Newtons (N). Mass – The amount of matter in an object. It is measured in kilograms (kg). ...
Linking Asteroids and Meteorites through Reflectance
... • The Moon does not completely disappear because of the refraction of sunlight by the Earth’s atmosphere • If the Earth had no atmosphere, the Moon would be completely dark during an eclipse. • The red color arises because sunlight reaching the Moon must pass through the Earth’s atmosphere, where it ...
... • The Moon does not completely disappear because of the refraction of sunlight by the Earth’s atmosphere • If the Earth had no atmosphere, the Moon would be completely dark during an eclipse. • The red color arises because sunlight reaching the Moon must pass through the Earth’s atmosphere, where it ...
How to Make a Solar System Necklace
... mi) is a unit of length which is well known in the United States. It is also known as a statute mile, and is equivalent to 5280 feet or 1760 yards. The kilometer is not as well understood. Those currently studying the metric system in school or having recently completed their schooling, can probably ...
... mi) is a unit of length which is well known in the United States. It is also known as a statute mile, and is equivalent to 5280 feet or 1760 yards. The kilometer is not as well understood. Those currently studying the metric system in school or having recently completed their schooling, can probably ...
Dynamics of Centaurs
... these old plates, Brian Marsden, of the Harvard-Smithsonian Center for Astrophysics, was able to compute Object-Kowal's orbit around the sun. Making a complete revolution once in about 50 years, it swings as close as 1.3 billion km. (790 million miles) to the sun—which brings it to a point just insi ...
... these old plates, Brian Marsden, of the Harvard-Smithsonian Center for Astrophysics, was able to compute Object-Kowal's orbit around the sun. Making a complete revolution once in about 50 years, it swings as close as 1.3 billion km. (790 million miles) to the sun—which brings it to a point just insi ...
The Blurring Distinction between Asteroids and Comets
... they ever will. It is unlikely that they will ever be given cometary designations, even if astronomers were to decide definitively that they are comets. The densities of Pluto, Charon, and a few other TNOs that have been measured are consistent with the high ice composition so common with other oute ...
... they ever will. It is unlikely that they will ever be given cometary designations, even if astronomers were to decide definitively that they are comets. The densities of Pluto, Charon, and a few other TNOs that have been measured are consistent with the high ice composition so common with other oute ...
10 - The Catholic University of America
... for Mars, Venus, and Mercury, than that for the Earth. This larger mass fraction would result in relatively large ancient oceans on Mars and Venus. For dust particles produced by comets and asteroids, PE was found to have a maximum (~0.001-0.02) at diameters of particles d~100 micron. These maximum ...
... for Mars, Venus, and Mercury, than that for the Earth. This larger mass fraction would result in relatively large ancient oceans on Mars and Venus. For dust particles produced by comets and asteroids, PE was found to have a maximum (~0.001-0.02) at diameters of particles d~100 micron. These maximum ...
plutinos
... moon’s orbital period exactly matches its own rotational period (roughly one month) — the ratio in this case is 1:1. The cause of resonance is gravitational; when bodies are in simple whole number ratios the gravitational effects of a larger body are synchronized – in other words, since the bodies a ...
... moon’s orbital period exactly matches its own rotational period (roughly one month) — the ratio in this case is 1:1. The cause of resonance is gravitational; when bodies are in simple whole number ratios the gravitational effects of a larger body are synchronized – in other words, since the bodies a ...
Changing Pluto`s Status as a Planet - e
... luto has been removed from the pantheon of planets and relegated to the status of a “dwarf planet,” leaving eight surviving planets. While this change requires everyone to re-learn the number of planets, it places Pluto into a new category that will eventually help astronomers better understand all ...
... luto has been removed from the pantheon of planets and relegated to the status of a “dwarf planet,” leaving eight surviving planets. While this change requires everyone to re-learn the number of planets, it places Pluto into a new category that will eventually help astronomers better understand all ...
the probabilities of collisions
... The larger value of P for Earth we have calculated compared to those argued by Morbidelli et al. [2000] (P (1-3)10-6) and Levison et al. [2001] (P = 410-7 ) is caused by the fact that in our runs we considered a larger number of Jupiter-crossing objects and the main portion of the probability of ...
... The larger value of P for Earth we have calculated compared to those argued by Morbidelli et al. [2000] (P (1-3)10-6) and Levison et al. [2001] (P = 410-7 ) is caused by the fact that in our runs we considered a larger number of Jupiter-crossing objects and the main portion of the probability of ...
LETTERS
... System. The asteroid belt was also strongly perturbed, with these objects supplying a significant fraction of the LHB impactors in accordance with recent geochemical evidence7,8. Our model not only naturally explains the LHB, but also reproduces the observational constraints of the outer Solar Syste ...
... System. The asteroid belt was also strongly perturbed, with these objects supplying a significant fraction of the LHB impactors in accordance with recent geochemical evidence7,8. Our model not only naturally explains the LHB, but also reproduces the observational constraints of the outer Solar Syste ...
pdf file
... System. The asteroid belt was also strongly perturbed, with these objects supplying a significant fraction of the LHB impactors in accordance with recent geochemical evidence7,8. Our model not only naturally explains the LHB, but also reproduces the observational constraints of the outer Solar Syste ...
... System. The asteroid belt was also strongly perturbed, with these objects supplying a significant fraction of the LHB impactors in accordance with recent geochemical evidence7,8. Our model not only naturally explains the LHB, but also reproduces the observational constraints of the outer Solar Syste ...
Exploring the Asteroids
... slightly more than the distance from Belfast to London) but about 460 km from pole to pole. Vesta has probably enjoyed a more eventful life than Ceres. In fact Vesta has had huge fragments splintered off itself. How do we know this? Astronomers can use a technique called reflection spectroscopy to i ...
... slightly more than the distance from Belfast to London) but about 460 km from pole to pole. Vesta has probably enjoyed a more eventful life than Ceres. In fact Vesta has had huge fragments splintered off itself. How do we know this? Astronomers can use a technique called reflection spectroscopy to i ...
Powerpoint Presentation Physical Geology, 10/e
... Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
... Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
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.