The Origin of Comets and the Oort Cloud
... effect].” E.g., quoted by Bjorkman (Meteoritics, 8, 91, 1973): “If a shooting star flashes as bright as a light or as a torch from east to west and disappears on the horizon, then the army of the enemy will be slain in its onslaught” 2. Some early cometary observations are quoted by Olivier (in “Come ...
... effect].” E.g., quoted by Bjorkman (Meteoritics, 8, 91, 1973): “If a shooting star flashes as bright as a light or as a torch from east to west and disappears on the horizon, then the army of the enemy will be slain in its onslaught” 2. Some early cometary observations are quoted by Olivier (in “Come ...
ASTR 110 Lab Manual Sections M02 M03 M04
... One special kind of relation is called a linear relation, where all of the data fall along a straight line in a graph like this. Carefully using a ruler, would you say that this relation is a linear relation? ...
... One special kind of relation is called a linear relation, where all of the data fall along a straight line in a graph like this. Carefully using a ruler, would you say that this relation is a linear relation? ...
2004 SA Orlov
... The proposed model of gravitation, cosmology and cosmogony is based on an assumption that the initial cause of rotations of all the celestial objects or their systems in the Universe is the vortex rotation (in corresponding space regions) of a gaseous cosmic-space medium, viz. the ether. The ether r ...
... The proposed model of gravitation, cosmology and cosmogony is based on an assumption that the initial cause of rotations of all the celestial objects or their systems in the Universe is the vortex rotation (in corresponding space regions) of a gaseous cosmic-space medium, viz. the ether. The ether r ...
Trans-Neptunian Objects as Natural Probes to the Unknown Solar System
... dynamically and chemically evolved protoplanetary disk composed of billions of planetesimals, the building blocks from which the planets formed during the early solar system. Consequently, the study of the physical and dynamical properties of TNOs can reveal important clues about the properties of t ...
... dynamically and chemically evolved protoplanetary disk composed of billions of planetesimals, the building blocks from which the planets formed during the early solar system. Consequently, the study of the physical and dynamical properties of TNOs can reveal important clues about the properties of t ...
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... the stars similar to the Sun may have giant planets. Many of the remaining stars may have long-period planets and/or currently undetectable, Earth-like planets. The existence of a theoretically surmised but heretofore unseen transNeptunian part of our Solar System was confirmed by observations (Jewi ...
... the stars similar to the Sun may have giant planets. Many of the remaining stars may have long-period planets and/or currently undetectable, Earth-like planets. The existence of a theoretically surmised but heretofore unseen transNeptunian part of our Solar System was confirmed by observations (Jewi ...
The Oort Cloud
... comets are shaped like extremely elongated ellipses. They approach the sun at the very edge of their orbits, and then take off again to distances as much as a hundred thousand times greater than the distance of the Earth from the Sun. As a result these comets spend most of their time far beyond the ...
... comets are shaped like extremely elongated ellipses. They approach the sun at the very edge of their orbits, and then take off again to distances as much as a hundred thousand times greater than the distance of the Earth from the Sun. As a result these comets spend most of their time far beyond the ...
dynamical history of the asteroid belt and implications for terrestrial
... system, forming the well-known Kirkwood gaps (Kirkwood, 1867). In addition to the well known low-order mean motion resonances with Jupiter that form the Kirkwood gaps, there are numerous weak resonances that cause long term orbital chaos and transport asteroids out of the main belt (Morbidelli and N ...
... system, forming the well-known Kirkwood gaps (Kirkwood, 1867). In addition to the well known low-order mean motion resonances with Jupiter that form the Kirkwood gaps, there are numerous weak resonances that cause long term orbital chaos and transport asteroids out of the main belt (Morbidelli and N ...
Asteroids - GEOCITIES.ws
... belt. This object is the parent body of the Geminid meteor stream and, since the parent bodies of all other meteor streams identified to date are comets, it is considered by some to be a defunct comet. Another asteroid, 944 Hidalgo, is also thought by some to be a defunct comet because of its unusua ...
... belt. This object is the parent body of the Geminid meteor stream and, since the parent bodies of all other meteor streams identified to date are comets, it is considered by some to be a defunct comet. Another asteroid, 944 Hidalgo, is also thought by some to be a defunct comet because of its unusua ...
MPhil Thesis - Final - Suzanne Knight
... white dwarfs, giant planets have nevertheless been detected, such as the confirmed ~ 2.5 MJup planetary companion at a distance ~ 43 AU from its primary located in the 2M1207 system (Sigurdsson et al. 2003; Chauvin et al. 2005; Zhou et al. 2012). With an effective temperature (Teff) ≤ 6000 K, cool w ...
... white dwarfs, giant planets have nevertheless been detected, such as the confirmed ~ 2.5 MJup planetary companion at a distance ~ 43 AU from its primary located in the 2M1207 system (Sigurdsson et al. 2003; Chauvin et al. 2005; Zhou et al. 2012). With an effective temperature (Teff) ≤ 6000 K, cool w ...
Mathematica - Press Center
... All rights reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechani cal, photocopying, recording or otherwise, without the prior written permission of the author Terry Robb and Wolfram Research, Inc. Stellar S ...
... All rights reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechani cal, photocopying, recording or otherwise, without the prior written permission of the author Terry Robb and Wolfram Research, Inc. Stellar S ...
comets, asteroids
... the Oort cloud after the man who discovered it Jan Oort. The Oort cloud is located 1000 times further away from the Sun than Neptune and Pluto. 27. What keeps the comet in orbit? 28. The Sun’s pulling power which is called gravity. It is the same force that keeps the Earth and other planets circling ...
... the Oort cloud after the man who discovered it Jan Oort. The Oort cloud is located 1000 times further away from the Sun than Neptune and Pluto. 27. What keeps the comet in orbit? 28. The Sun’s pulling power which is called gravity. It is the same force that keeps the Earth and other planets circling ...
On the Migratory Behavior of Planetary Systems The Harvard
... systems evolve: is planetary migration typically a smooth, disk-driven process or a violent process involving strong multi-body gravitational interactions? First, we analyze evidence from the dynamical structure of debris disks dynamically sculpted during planets’ migration. Based on the orbital pro ...
... systems evolve: is planetary migration typically a smooth, disk-driven process or a violent process involving strong multi-body gravitational interactions? First, we analyze evidence from the dynamical structure of debris disks dynamically sculpted during planets’ migration. Based on the orbital pro ...
Abiotic formation of O2 and O3 in high
... 15-20 years, space-based telescopes, such as the two Terrestrial Planet Finder (TPF) missions planned by NASA (http://planetquest.jpl.nasa.gov/TPF/tpf c team.cfm) and ESA’s Darwin mission (http://ast.star.rl.ac.uk/darwin/), will hopefully search for Earth-sized planets around other stars and attempt ...
... 15-20 years, space-based telescopes, such as the two Terrestrial Planet Finder (TPF) missions planned by NASA (http://planetquest.jpl.nasa.gov/TPF/tpf c team.cfm) and ESA’s Darwin mission (http://ast.star.rl.ac.uk/darwin/), will hopefully search for Earth-sized planets around other stars and attempt ...
Super-Earth and Sub-Neptune Exoplanets: a First Look from the
... Observations of an exoplanet’s atmosphere encode information about the physical, chemical, and (potentially) biological processes that have shaped the planet. However, interpreting atmospheric measurements also requires context, and is easiest for those systems about which we know most. Empirical co ...
... Observations of an exoplanet’s atmosphere encode information about the physical, chemical, and (potentially) biological processes that have shaped the planet. However, interpreting atmospheric measurements also requires context, and is easiest for those systems about which we know most. Empirical co ...
The Dynamical Evolution of the Asteroid Belt
... possible that secular resonances sweep through the asteroid belt as the gas dissipates. This means that every asteroid, whatever its location in the belt, first has orbital precession rates slower than the g5, g6 frequencies of Jupiter and Saturn when there is a lot of gas in the disk, then enters r ...
... possible that secular resonances sweep through the asteroid belt as the gas dissipates. This means that every asteroid, whatever its location in the belt, first has orbital precession rates slower than the g5, g6 frequencies of Jupiter and Saturn when there is a lot of gas in the disk, then enters r ...
ABSTRACT
... it challenged the authority of the Church, but also because it used almost as many epicycles as Ptolemy’s model did in order to precisely agree with observations. In 1609, Johannes Kepler published his famous laws on planetary orbits, which claimed that planets, including the Earth, orbit in ellipse ...
... it challenged the authority of the Church, but also because it used almost as many epicycles as Ptolemy’s model did in order to precisely agree with observations. In 1609, Johannes Kepler published his famous laws on planetary orbits, which claimed that planets, including the Earth, orbit in ellipse ...
Evidence for the Tidal Destruction of Hot Jupiters by Subgiant Stars
... Figure 2. Galactic U V W kinematics of subgiant stars that host exoplanets discovered with the radial-velocity technique. In each panel, we plot the U V W space motions of the subgiant sample as blue points and the density of points in a control sample selected from the Hipparcos catalog as the back ...
... Figure 2. Galactic U V W kinematics of subgiant stars that host exoplanets discovered with the radial-velocity technique. In each panel, we plot the U V W space motions of the subgiant sample as blue points and the density of points in a control sample selected from the Hipparcos catalog as the back ...
Venus Retrograde 2015: Love, Lust and War
... Mercury and Venus (which are inferior planets since they lie closer to the Sun than the Earth) will always form an inferior conjunction with the Sun (i.e., between the Sun and the Earth) midway through their retrograde cycle. Conjunctions of Sun with either Mercury or Venus alternate their conjunct ...
... Mercury and Venus (which are inferior planets since they lie closer to the Sun than the Earth) will always form an inferior conjunction with the Sun (i.e., between the Sun and the Earth) midway through their retrograde cycle. Conjunctions of Sun with either Mercury or Venus alternate their conjunct ...
Full Program with Abstracts - CIERA
... accurately the masses and infer compositions for a sample of these small worlds. Here I report on our conclusions from the first three years. After analyzing the Kepler light curves to vet potential targets, favoring those with asteroseismic estimates of the stellar properties and excluding those li ...
... accurately the masses and infer compositions for a sample of these small worlds. Here I report on our conclusions from the first three years. After analyzing the Kepler light curves to vet potential targets, favoring those with asteroseismic estimates of the stellar properties and excluding those li ...
JRASC, June 2014 Issue (PDF, low resolution)
... of a historical, biographical, or educational nature of general interest to the astronomical community. All contributions are welcome, but the editors reserve the right to edit material prior to publication. Research papers are reviewed prior to publication, and professional astronomers with institu ...
... of a historical, biographical, or educational nature of general interest to the astronomical community. All contributions are welcome, but the editors reserve the right to edit material prior to publication. Research papers are reviewed prior to publication, and professional astronomers with institu ...
- TestbankU
... years of the discovery of Ceres and all had orbital distances near 2.8 AU. Futhermore, the objects were all much smaller than other planets, or even our own Moon. How might you have reacted as an astronomer of that time? a. Bode’s Law still applies to the orbits of planets b. Bode’s Law still applie ...
... years of the discovery of Ceres and all had orbital distances near 2.8 AU. Futhermore, the objects were all much smaller than other planets, or even our own Moon. How might you have reacted as an astronomer of that time? a. Bode’s Law still applies to the orbits of planets b. Bode’s Law still applie ...
January 2014 Astronomy Calendar by Dave Mitsky Some
... Mercury returns to the evening sky by mid-month, beginning one of its two best evening apparitions of the year for mid-northern latitude observers. An extremely thin waning crescent Moon is located five degrees north of the planet on January 31. The tiny planet reaches a greatest eastern elongation ...
... Mercury returns to the evening sky by mid-month, beginning one of its two best evening apparitions of the year for mid-northern latitude observers. An extremely thin waning crescent Moon is located five degrees north of the planet on January 31. The tiny planet reaches a greatest eastern elongation ...
Detection of Earth-impacting asteroids with the next generation all
... The impactor and NEO orbit distributions have already been discussed briefly above and in detail by Chesley & Spahr (2004). The differences between the impactor population and the fireballs are perhaps more interesting where it is important to keep in mind that the comparison in Fig. 1 is between th ...
... The impactor and NEO orbit distributions have already been discussed briefly above and in detail by Chesley & Spahr (2004). The differences between the impactor population and the fireballs are perhaps more interesting where it is important to keep in mind that the comparison in Fig. 1 is between th ...
Planets beyond Neptune
Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. The search began in the mid-19th century and culminated at the start of the 20th with Percival Lowell's quest for Planet X. Lowell proposed the Planet X hypothesis to explain apparent discrepancies in the orbits of the giant planets, particularly Uranus and Neptune, speculating that the gravity of a large unseen ninth planet could have perturbed Uranus enough to account for the irregularities.Clyde Tombaugh's discovery of Pluto in 1930 appeared to validate Lowell's hypothesis, and Pluto was officially named the ninth planet. In 1978, Pluto was conclusively determined to be too small for its gravity to affect the giant planets, resulting in a brief search for a tenth planet. The search was largely abandoned in the early 1990s, when a study of measurements made by the Voyager 2 spacecraft found that the irregularities observed in Uranus's orbit were due to a slight overestimation of Neptune's mass. After 1992, the discovery of numerous small icy objects with similar or even wider orbits than Pluto led to a debate over whether Pluto should remain a planet, or whether it and its neighbours should, like the asteroids, be given their own separate classification. Although a number of the larger members of this group were initially described as planets, in 2006 the International Astronomical Union reclassified Pluto and its largest neighbours as dwarf planets, leaving Neptune the farthest known planet in the Solar System.Today, the astronomical community widely agrees that Planet X, as originally envisioned, does not exist, but the concept of Planet X has been revived by a number of astronomers to explain other anomalies observed in the outer Solar System. In popular culture, and even among some astronomers, Planet X has become a stand-in term for any undiscovered planet in the outer Solar System, regardless of its relationship to Lowell's hypothesis. Other trans-Neptunian planets have also been suggested, based on different evidence. As of March 2014, observations with the WISE telescope have ruled out the possibility of a Saturn-sized object out to 10,000 AU, and a Jupiter-sized or larger object out to 26,000 AU.