COMETS! - Santa Ana College
... opinion. Keep in mind, that if a large object is spotted in our solar system, telescopes and cameras used by backyard astronomers allow them to see these objects also. Not just the big telescopes can see them, as was the case in centuries past. If a large comet is heading toward us, you can be sure ...
... opinion. Keep in mind, that if a large object is spotted in our solar system, telescopes and cameras used by backyard astronomers allow them to see these objects also. Not just the big telescopes can see them, as was the case in centuries past. If a large comet is heading toward us, you can be sure ...
Irregular Satellites of the Planets: Products of Capture in the Early
... Annu. Rev. Astro. Astrophys. 2007.45:261-295. Downloaded from arjournals.annualreviews.org by University of Hawaii at Manoa Library on 09/20/07. For personal use only. ...
... Annu. Rev. Astro. Astrophys. 2007.45:261-295. Downloaded from arjournals.annualreviews.org by University of Hawaii at Manoa Library on 09/20/07. For personal use only. ...
Comet Facts, Myths, and Legends
... we see often – every 100 years – come from the Kuiper belt, and comets that we see rarely – every few thousand years – come from the Oort cloud. Myth Comets are composed of the same material as asteroids. Reality Although comets and asteroids are both tiny bodies that orbit in the Solar System, thei ...
... we see often – every 100 years – come from the Kuiper belt, and comets that we see rarely – every few thousand years – come from the Oort cloud. Myth Comets are composed of the same material as asteroids. Reality Although comets and asteroids are both tiny bodies that orbit in the Solar System, thei ...
Ultra Deep Survey for Irregular Satellites of Uranus: Limits to
... The Subaru survey observations were obtained when Uranus was near opposition, where the apparent movement is largely parallactic and thus is inversely related to the distance. Objects at the heliocentric distance of Uranus, R ∼ 20 AU, will have an apparent motion of about ∼ 6′′ hr−1 (∼ 30 pixels per ...
... The Subaru survey observations were obtained when Uranus was near opposition, where the apparent movement is largely parallactic and thus is inversely related to the distance. Objects at the heliocentric distance of Uranus, R ∼ 20 AU, will have an apparent motion of about ∼ 6′′ hr−1 (∼ 30 pixels per ...
the role of comets in panspermia - ORCA
... It is difficult to estimate the dose of cosmic rays received by a naked bacterium in a typical location in interstellar space, over a fraction of a million years. Within the solar system it is possibly in the range 10-45 Mrad per million years and depends on the distance from the sun and the phase o ...
... It is difficult to estimate the dose of cosmic rays received by a naked bacterium in a typical location in interstellar space, over a fraction of a million years. Within the solar system it is possibly in the range 10-45 Mrad per million years and depends on the distance from the sun and the phase o ...
Program with Abstracts - Division on Dynamical Astronomy
... 102.02 – Did our Solar System once have a STIP? Con"nuing the established tradi"on in the field of specula"ve "fairy tales", we postulate that our Solar System once had a set of several addi"onal Earth-scale planets interior to the orbit of Venus. This would resolve a known issue that the energy and ...
... 102.02 – Did our Solar System once have a STIP? Con"nuing the established tradi"on in the field of specula"ve "fairy tales", we postulate that our Solar System once had a set of several addi"onal Earth-scale planets interior to the orbit of Venus. This would resolve a known issue that the energy and ...
Introduction to Comets - Mr. Hill`s Science Website
... This comet was first seen in July 1862 by American 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 pas ...
... This comet was first seen in July 1862 by American 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 pas ...
orbital resonances and chaos in the solar system
... swing at its natural frequency and rapidly increases the swing amplitude; the older child accomplishes the same on her own without outside assistance by driving the swing at a frequency twice that of its natural frequency. Resonance phenomena in the Solar system are essentially similar – the driving ...
... swing at its natural frequency and rapidly increases the swing amplitude; the older child accomplishes the same on her own without outside assistance by driving the swing at a frequency twice that of its natural frequency. Resonance phenomena in the Solar system are essentially similar – the driving ...
Harmonic Resonances of Planet and Moon Orbits
... to be universally applicable, to the planets of our solar system, planetary moon systems, Saturn-like ring systems, and stellar exo-planetary systems. A novel approach of this study is the interpretation of harmonic orbit resonances in terms of a selforganization system (not to be confused with self ...
... to be universally applicable, to the planets of our solar system, planetary moon systems, Saturn-like ring systems, and stellar exo-planetary systems. A novel approach of this study is the interpretation of harmonic orbit resonances in terms of a selforganization system (not to be confused with self ...
Minor Jovian Satellites & Rings
... Uranus also has several groups of newly discovered satellites, which includes a new group of irregular satellites: • Caliban and Sycorax (or S/1997 U1 and S/1997 U2) were discovered in 1997, also by Brett Gladman’s group. They orbit Uranus at 7.2 and 12.2 million km, way past the orbit of Oberon, on ...
... Uranus also has several groups of newly discovered satellites, which includes a new group of irregular satellites: • Caliban and Sycorax (or S/1997 U1 and S/1997 U2) were discovered in 1997, also by Brett Gladman’s group. They orbit Uranus at 7.2 and 12.2 million km, way past the orbit of Oberon, on ...
Accretion of planetary embryos in the inner and outer solar system
... 2.1. Outcome of runaway: isolation mass Runaway growth can be quite rapid (and generally is faster than orderly growth), but its essential property is not its rate, but the resulting size distribution. A trivial initial size difference eventually yields one largest body containing much of the availa ...
... 2.1. Outcome of runaway: isolation mass Runaway growth can be quite rapid (and generally is faster than orderly growth), but its essential property is not its rate, but the resulting size distribution. A trivial initial size difference eventually yields one largest body containing much of the availa ...
Asteroids - Elements Magazine
... asteroids are thought to be piles of rubble held together loosely by gravity (Michel and Richardson 2013; see also Tsuchiyama 2014 this issue). The largest asteroids (those larger than ~100 km), however, are probably primordial objects that were never disrupted (Asphaug 2009). ...
... asteroids are thought to be piles of rubble held together loosely by gravity (Michel and Richardson 2013; see also Tsuchiyama 2014 this issue). The largest asteroids (those larger than ~100 km), however, are probably primordial objects that were never disrupted (Asphaug 2009). ...
Our Solar System
... d. are too far from the sun. e. have magnetic fields that are much too weak. Belt-zone circulation is not easily visible on Uranus because a. no clouds form in the pure hydrogen atmosphere. b. there is no differential rotation. c. clouds form very deep in the atmosphere. d. the atmosphere is stirred ...
... d. are too far from the sun. e. have magnetic fields that are much too weak. Belt-zone circulation is not easily visible on Uranus because a. no clouds form in the pure hydrogen atmosphere. b. there is no differential rotation. c. clouds form very deep in the atmosphere. d. the atmosphere is stirred ...
Oort Cloud Formation and Dynamics
... of the planetesimals onto planet-crossing orbits in 10 m.y. or less (Gladman and Duncan, 1990; Holman and Wisdom, 1993; Levison and Duncan, 1993; Grazier et al., 1999a,b). The major exception to this rule is in the Kuiper belt, where some orbits remain stable for billions of years (Holman and Wisdom ...
... of the planetesimals onto planet-crossing orbits in 10 m.y. or less (Gladman and Duncan, 1990; Holman and Wisdom, 1993; Levison and Duncan, 1993; Grazier et al., 1999a,b). The major exception to this rule is in the Kuiper belt, where some orbits remain stable for billions of years (Holman and Wisdom ...
Symplectic map description of Halley’s comet dynamics
... planet contributions of the SS kick function. According to (4) each contribution Fi (x) is proportional to µi the ratio between the ith planet mass and the total SS mass which explains the different kick function magnitude observed in Fig. 3. As Venus, Earth and Mars have semi axis of the order of H ...
... planet contributions of the SS kick function. According to (4) each contribution Fi (x) is proportional to µi the ratio between the ith planet mass and the total SS mass which explains the different kick function magnitude observed in Fig. 3. As Venus, Earth and Mars have semi axis of the order of H ...
Resonance Trapping in Protoplanetary Discs
... 1993). The theory had been developed about 15 years before the discovery of 51 Pegasi b, and this migration had been predicted. What was not predicted, however, was that planets of this size could be found on such short period orbits. Today, there are over 200 known extrasolar planets in over 190 pl ...
... 1993). The theory had been developed about 15 years before the discovery of 51 Pegasi b, and this migration had been predicted. What was not predicted, however, was that planets of this size could be found on such short period orbits. Today, there are over 200 known extrasolar planets in over 190 pl ...
orbital perturbations of the galilean satellites during planetary
... make the planetary system unstable long after the dispersal of the protoplanetary nebula. Additional modifications of the original Nice model were motivated by the evolution of secular modes during planetary migration, mainly g5 , g6 , and s6 , and their effects on the terrestrial planets and astero ...
... make the planetary system unstable long after the dispersal of the protoplanetary nebula. Additional modifications of the original Nice model were motivated by the evolution of secular modes during planetary migration, mainly g5 , g6 , and s6 , and their effects on the terrestrial planets and astero ...
The Primordial Excitation and Clearing of the Asteroid Belt
... seems that their evolution during the first 10 My is not important. The median lifetime of particles in simulation A1 after Jupiter is introduced is about 1.5 My. This very short time scale for the mass depletion is in good agreement with the absence of high collisional activity deduced from the exi ...
... seems that their evolution during the first 10 My is not important. The median lifetime of particles in simulation A1 after Jupiter is introduced is about 1.5 My. This very short time scale for the mass depletion is in good agreement with the absence of high collisional activity deduced from the exi ...
final stages of planet formation
... A few definitions are in order. For simplicity, we consider two classes of bodies, big ones and small ones, each composed of material density . We denote the surface mass density, random velocity dispersion, and radius of the former by , v, and R and of the latter by , u, and s. The distance from ...
... A few definitions are in order. For simplicity, we consider two classes of bodies, big ones and small ones, each composed of material density . We denote the surface mass density, random velocity dispersion, and radius of the former by , v, and R and of the latter by , u, and s. The distance from ...
Orbital Perturbations of the Galilean Satellites During Planetary
... between planets and the planetesimal disk. This exchange of energy induces the inward migration of the inner ice giant. As this planet is locked in resonance with Saturn, due to the adiabatic invariance, its eccentricity increases. During this process, the system crosses many weak secular resonances ...
... between planets and the planetesimal disk. This exchange of energy induces the inward migration of the inner ice giant. As this planet is locked in resonance with Saturn, due to the adiabatic invariance, its eccentricity increases. During this process, the system crosses many weak secular resonances ...
An abundant population of small irregular satellites
... would prevent the fragments from dispersing4. Additionally, gas drag acting on the fragments would produce a size-dependent sorting of the orbits within each group2,4,6. No size versus orbital property correlations are seen in the groupings in the ,1 km to ,100 km size range. For these reasons we be ...
... would prevent the fragments from dispersing4. Additionally, gas drag acting on the fragments would produce a size-dependent sorting of the orbits within each group2,4,6. No size versus orbital property correlations are seen in the groupings in the ,1 km to ,100 km size range. For these reasons we be ...
An abundant population of small irregular satellites around Jupiter
... would prevent the fragments from dispersing4. Additionally, gas drag acting on the fragments would produce a size-dependent sorting of the orbits within each group2,4,6. No size versus orbital property correlations are seen in the groupings in the ,1 km to ,100 km size range. For these reasons we be ...
... would prevent the fragments from dispersing4. Additionally, gas drag acting on the fragments would produce a size-dependent sorting of the orbits within each group2,4,6. No size versus orbital property correlations are seen in the groupings in the ,1 km to ,100 km size range. For these reasons we be ...
Celestial Systems
... Describe how the Earth orbits the Sun and the Moon orbits the Earth. Describe the Sun (i.e., a medium-size star, the largest body in our solar system, major source of energy for phenomena on Earth’s surface). Describe how planets, asteroids, and comets orbit the Sun. Describe meteors (e.g., ...
... Describe how the Earth orbits the Sun and the Moon orbits the Earth. Describe the Sun (i.e., a medium-size star, the largest body in our solar system, major source of energy for phenomena on Earth’s surface). Describe how planets, asteroids, and comets orbit the Sun. Describe meteors (e.g., ...
Theory of planet formation
... – specific angular momentum of order (GMR)1/2 not (GMaJ)1/2; factor 30 too small (Russell 1935) (not a problem for some extrasolar planets!) – 1 Jupiter mass of material requires digging to R ~ 0.1 R where temperature ~5 × 105 K and resulting blob will have positive energy, and cooling time ~ 10 ...
... – specific angular momentum of order (GMR)1/2 not (GMaJ)1/2; factor 30 too small (Russell 1935) (not a problem for some extrasolar planets!) – 1 Jupiter mass of material requires digging to R ~ 0.1 R where temperature ~5 × 105 K and resulting blob will have positive energy, and cooling time ~ 10 ...
Determination of meteor showers on other planets using comet
... As they traverse their orbits about the Sun, comets slowly evaporate and fragment, leaving small bits of cometary debris along their orbital tracks. Some comet orbits intersect the Earth’s path, and the planet sweeps up a portion of these particulates each year. Generally, these particles are drawn ...
... As they traverse their orbits about the Sun, comets slowly evaporate and fragment, leaving small bits of cometary debris along their orbital tracks. Some comet orbits intersect the Earth’s path, and the planet sweeps up a portion of these particulates each year. Generally, these particles are drawn ...
Scattered disc
The scattered disc (or scattered disk) is a distant region of the Solar System that is sparsely populated by icy minor planets, a subset of the broader family of trans-Neptunian objects. The scattered-disc objects (SDOs) have orbital eccentricities ranging as high as 0.8, inclinations as high as 40°, and perihelia greater than 30 astronomical units (4.5×109 km; 2.8×109 mi). These extreme orbits are thought to be the result of gravitational ""scattering"" by the gas giants, and the objects continue to be subject to perturbation by the planet Neptune.Although the closest scattered-disc objects approach the Sun at about 30–35 AU, their orbits can extend well beyond 100 AU. This makes scattered objects among the most distant and coldest objects in the Solar System. The innermost portion of the scattered disc overlaps with a torus-shaped region of orbiting objects traditionally called the Kuiper belt, but its outer limits reach much farther away from the Sun and farther above and below the ecliptic than the Kuiper belt proper.Because of its unstable nature, astronomers now consider the scattered disc to be the place of origin for most periodic comets in the Solar System, with the centaurs, a population of icy bodies between Jupiter and Neptune, being the intermediate stage in an object's migration from the disc to the inner Solar System. Eventually, perturbations from the giant planets send such objects towards the Sun, transforming them into periodic comets. Many Oort cloud objects are also thought to have originated in the scattered disc. Detached objects are not sharply distinct from scattered disc objects, and some such as Sedna have sometimes been considered to be included in this group.