Formation of Giant Planets - Lunar and Planetary Institute
... time of planet formation. It is possible that the current core is an eroded remnant (less massive than the primordial core) or even enhanced because of rainout of heavy elements from the planet’s envelope. Seismology is by far the best method for establishing the existence and nature of a core, but ...
... time of planet formation. It is possible that the current core is an eroded remnant (less massive than the primordial core) or even enhanced because of rainout of heavy elements from the planet’s envelope. Seismology is by far the best method for establishing the existence and nature of a core, but ...
- MNASSA Page
... of 100 million suns and brightened up more than 2 000 times than it was before. Although the supernova itself is now a million times fainter than 23 years ago, light echoes are just beginning to show in the space surrounding it. Supernova 1987A was a blue super giant, with a core collapse that shoul ...
... of 100 million suns and brightened up more than 2 000 times than it was before. Although the supernova itself is now a million times fainter than 23 years ago, light echoes are just beginning to show in the space surrounding it. Supernova 1987A was a blue super giant, with a core collapse that shoul ...
Asteroids in retrograde resonance with Jupiter
... July 1). Such bodies are thought to originate mainly in the Oort Cloud comet reservoir (Jewitt 2005). However, numerical simulations have recently indicated that retrograde orbits in the inner Solar system may be produced through the gravitational excitation exerted by the gas giants (Greenstreet et ...
... July 1). Such bodies are thought to originate mainly in the Oort Cloud comet reservoir (Jewitt 2005). However, numerical simulations have recently indicated that retrograde orbits in the inner Solar system may be produced through the gravitational excitation exerted by the gas giants (Greenstreet et ...
Migration of giant planets in planetesimal discs
... negligible inclination and eccentricity, ip , ep , 0 and that the initial heliocentric distance of the planet is 5.2 au. The objects lying in the plane have no way of knowing that they are moving into a non-spherically symmetric potential. Hence we expect that the dynamical drag is exerted in the di ...
... negligible inclination and eccentricity, ip , ep , 0 and that the initial heliocentric distance of the planet is 5.2 au. The objects lying in the plane have no way of knowing that they are moving into a non-spherically symmetric potential. Hence we expect that the dynamical drag is exerted in the di ...
Planet Saturn
... learn about the physical characteristics of saturn and its famous rings, what we know about saturn’s moons and saturn’s roots in greek mythology. SATURN - OVERVIEW | PLANETS - NASA SOLAR SYSTEM EXPLORATION Sun, 16 Apr 2017 10:41:00 GMT the second largest planet in our solar system, adorned with thou ...
... learn about the physical characteristics of saturn and its famous rings, what we know about saturn’s moons and saturn’s roots in greek mythology. SATURN - OVERVIEW | PLANETS - NASA SOLAR SYSTEM EXPLORATION Sun, 16 Apr 2017 10:41:00 GMT the second largest planet in our solar system, adorned with thou ...
Script
... observed radio pulses can be used to track changes in the pulsar's motion caused by the presence of planets. Like an ordinary star, a pulsar will move in its own small orbit if it has a planet thus giving rise to the Doppler effect. Calculations based on pulse-timing measurements can then reveal the ...
... observed radio pulses can be used to track changes in the pulsar's motion caused by the presence of planets. Like an ordinary star, a pulsar will move in its own small orbit if it has a planet thus giving rise to the Doppler effect. Calculations based on pulse-timing measurements can then reveal the ...
October 2016 BRAS Newsletter - The Baton Rouge Astronomical
... In addition to these events, I'd like to try to get a sidewalk astronomy event in place for either Wednesday or Thursday October 12th-13th. I scouted out Perkins Rowe and it looks like it would be excellent both view of the sky-wise and passersby-wise. It will ultimately depend on who gives us ...
... In addition to these events, I'd like to try to get a sidewalk astronomy event in place for either Wednesday or Thursday October 12th-13th. I scouted out Perkins Rowe and it looks like it would be excellent both view of the sky-wise and passersby-wise. It will ultimately depend on who gives us ...
On disc driven inward migration of resonantly coupled planets with
... to owe their origin to migration induced by tidal interaction with the central planet (e.g. Goldreich 1965). Recent simulations of single protoplanets in the observed mass range (Kley 1999; Bryden et al. 1999; Lubow et al. 1999) interacting with a disc with parameters thought to be typical of protop ...
... to owe their origin to migration induced by tidal interaction with the central planet (e.g. Goldreich 1965). Recent simulations of single protoplanets in the observed mass range (Kley 1999; Bryden et al. 1999; Lubow et al. 1999) interacting with a disc with parameters thought to be typical of protop ...
The Reception of the Copernican Revolution
... superior to the Alphonsine Tables of 1483, which were calculated using Ptolemy’s geocentric model. This general sense of mistrust towards Copernicanism was shared by Tycho Brahe (1546–1601), the most celebrated astronomer of his time and an experimentalist renowned for the quality of his observation ...
... superior to the Alphonsine Tables of 1483, which were calculated using Ptolemy’s geocentric model. This general sense of mistrust towards Copernicanism was shared by Tycho Brahe (1546–1601), the most celebrated astronomer of his time and an experimentalist renowned for the quality of his observation ...
Dynamics of small bodies in planetary systems
... Nevertheless, it seems that the majority of the known debris disks have SEDs that are dominated by dust at a single temperature, and are seen in images to be dominated by dust at a distance from the star that is compatible with that temperature. More often than not that distance is > 30 AU from the ...
... Nevertheless, it seems that the majority of the known debris disks have SEDs that are dominated by dust at a single temperature, and are seen in images to be dominated by dust at a distance from the star that is compatible with that temperature. More often than not that distance is > 30 AU from the ...
1 NOTES ON GALILEO Galileo was born in Pisa of the famous
... passes behind Jupiter once every 8 hours. Its moment of eclipse can be seen from anywhere on Earth that Jupiter is visible. With a book of predicted eclipse times, a navigator far from home could use the observed eclipses to reset his clock as often as needed, allowing him to determine his longitude ...
... passes behind Jupiter once every 8 hours. Its moment of eclipse can be seen from anywhere on Earth that Jupiter is visible. With a book of predicted eclipse times, a navigator far from home could use the observed eclipses to reset his clock as often as needed, allowing him to determine his longitude ...
Lecture 9 - Notes on Galileo
... passes behind Jupiter once every 8 hours. Its moment of eclipse can be seen from anywhere on Earth that Jupiter is visible. With a book of predicted eclipse times, a navigator far from home could use the observed eclipses to reset his clock as often as needed, allowing him to determine his longitude ...
... passes behind Jupiter once every 8 hours. Its moment of eclipse can be seen from anywhere on Earth that Jupiter is visible. With a book of predicted eclipse times, a navigator far from home could use the observed eclipses to reset his clock as often as needed, allowing him to determine his longitude ...
Planet Hunters: The First Two Planet Candidates Identified by the
... that six of the ten were unlikely to be planet candidates. KIC 11904734 has a V-shaped transit and very large radius, suggesting an eclipsing binary star system. KIC 8043052 and KIC 12009347 have secondary occultations that are also consistent with eclipsing binary systems. KIC 4913000 and KIC 90978 ...
... that six of the ten were unlikely to be planet candidates. KIC 11904734 has a V-shaped transit and very large radius, suggesting an eclipsing binary star system. KIC 8043052 and KIC 12009347 have secondary occultations that are also consistent with eclipsing binary systems. KIC 4913000 and KIC 90978 ...
Pluto and the Galactic Center
... Following the contraction of our Sun that formed long ago from the primal gaseous nebula, it could be hypothesized that humanity is engaged in an evolutionary process proceeding from planet to planet, drawing ever closer to the Sun.5 According to this hypothesis, evidently cosmic evolution began wit ...
... Following the contraction of our Sun that formed long ago from the primal gaseous nebula, it could be hypothesized that humanity is engaged in an evolutionary process proceeding from planet to planet, drawing ever closer to the Sun.5 According to this hypothesis, evidently cosmic evolution began wit ...
September - Rose City Astronomers
... most of his observing with scopes that had very close to the same equivalent aperture as my 80mm so the views must have been fairly close. It was impossible to tell visually that M101 was a galaxy and M13 was a globular cluster, which leads me think that Messier would be as astonished to know how di ...
... most of his observing with scopes that had very close to the same equivalent aperture as my 80mm so the views must have been fairly close. It was impossible to tell visually that M101 was a galaxy and M13 was a globular cluster, which leads me think that Messier would be as astonished to know how di ...
BBC NEWS 15 July 2015 PLUTO: What jhave we learnt so far? Now
... is all in one piece, researchers can look forward to a "waterfall" of images and data from the strange, distant world over the next 16 months. But even though just a couple of pictures from the dwarf planet have been released so far, scientists are learning more from these than they have in years of ...
... is all in one piece, researchers can look forward to a "waterfall" of images and data from the strange, distant world over the next 16 months. But even though just a couple of pictures from the dwarf planet have been released so far, scientists are learning more from these than they have in years of ...
Solutions to exercises
... Exercise 2.3 (a) The bandpass is broad and centred on 700 nm, so we will use the fiducial flux density value for the R band, which is centred on 700 nm. Since the value of the sky brightness is already given in pixel units in Table 2.1, we can slightly simplify the procedure outlined in the text. The ...
... Exercise 2.3 (a) The bandpass is broad and centred on 700 nm, so we will use the fiducial flux density value for the R band, which is centred on 700 nm. Since the value of the sky brightness is already given in pixel units in Table 2.1, we can slightly simplify the procedure outlined in the text. The ...
June - Magic Valley Astronomical Society
... The Sun is located in Taurus on June 1st. It enters Gemini on June 21st. The Sun reaches its farthest position north for the year on June 21st. There are 15 hours of daylight at latitude 40 degrees north on the day of the summer solstice. At latitude 40 degrees north, the earliest sunrise occurs on ...
... The Sun is located in Taurus on June 1st. It enters Gemini on June 21st. The Sun reaches its farthest position north for the year on June 21st. There are 15 hours of daylight at latitude 40 degrees north on the day of the summer solstice. At latitude 40 degrees north, the earliest sunrise occurs on ...
Read an Excerpt!
... that “the outer region of the solar system, beyond the orbits of the planets, is occupied by a very large number of comparatively small bodies.” Edgeworth said these worlds were leftovers from the birth of the solar system. In 1951, American astronomer Gerard Kuiper suggested the same idea. For many ...
... that “the outer region of the solar system, beyond the orbits of the planets, is occupied by a very large number of comparatively small bodies.” Edgeworth said these worlds were leftovers from the birth of the solar system. In 1951, American astronomer Gerard Kuiper suggested the same idea. For many ...
1. INTRODUCTION
... THE ASTROPHYSICAL JOURNAL, 536 : 902È914, 2000 June 20 ( 2000. The American Astronomical Society. All rights reserved. Printed in U.S.A. ...
... THE ASTROPHYSICAL JOURNAL, 536 : 902È914, 2000 June 20 ( 2000. The American Astronomical Society. All rights reserved. Printed in U.S.A. ...
Introduction
... interest. There have been centuries of speculation on whether our planet, the Earth, and our planetary system, the Solar System, were ones of many. As early as the 3rd century B.C., Epicurus (341-270 B.C.) said “There are infinite worlds both like and unlike this world of ours. For the atoms being i ...
... interest. There have been centuries of speculation on whether our planet, the Earth, and our planetary system, the Solar System, were ones of many. As early as the 3rd century B.C., Epicurus (341-270 B.C.) said “There are infinite worlds both like and unlike this world of ours. For the atoms being i ...
Phase light curves for extrasolar Jupiter and Saturn
... photometry) (Charbonneau et al. 2000). Two exoplanets were detected first by transit photometry (Konacki et al. 2003) and another reference here? and then confirmed with Doppler measurements. It is expected that in the next decade, as photometric techniques are improved both from the ground and in spa ...
... photometry) (Charbonneau et al. 2000). Two exoplanets were detected first by transit photometry (Konacki et al. 2003) and another reference here? and then confirmed with Doppler measurements. It is expected that in the next decade, as photometric techniques are improved both from the ground and in spa ...
Comprehensive Wide-Band Magnitudes and Albedos for the Planets
... on Johnson-Cousins photometric planetary magnitudes, describes how synthetic magnitudes were derived from spectrophotometry and lists the adopted reference magnitudes. Section 4 describes the new Sloan photometry which was performed for this study. Section 5 lists the Sloan photometric results along ...
... on Johnson-Cousins photometric planetary magnitudes, describes how synthetic magnitudes were derived from spectrophotometry and lists the adopted reference magnitudes. Section 4 describes the new Sloan photometry which was performed for this study. Section 5 lists the Sloan photometric results along ...
Formation and Detectability of Terrestrial Planets around
... components to constrain the binary orbital parameters. (See their reference list for an historical listing of publications relating to observations of α Cen A and B.) A similar study had been done by Pourbaix et al. (1999). In the earlier study, after fitting for the binary orbit, they examined the ...
... components to constrain the binary orbital parameters. (See their reference list for an historical listing of publications relating to observations of α Cen A and B.) A similar study had been done by Pourbaix et al. (1999). In the earlier study, after fitting for the binary orbit, they examined the ...
Discovery of Neptune
The planet Neptune was mathematically predicted before it was directly observed. With a prediction by Urbain Le Verrier, telescopic observations confirming the existence of a major planet were made on the night of September 23–24, 1846, at the Berlin Observatory, by astronomer Johann Gottfried Galle (assisted by Heinrich Louis d'Arrest), working from Le Verrier's calculations. It was a sensational moment of 19th century science and dramatic confirmation of Newtonian gravitational theory. In François Arago's apt phrase, Le Verrier had discovered a planet ""with the point of his pen"".In retrospect, after it was discovered it turned out it had been observed many times before but not recognized, and there were others who made various calculations about its location, which did not lead to its observation. By 1847 the planet Uranus had completed nearly one full orbit since its discovery by William Herschel in 1781, and astronomers had detected a series of irregularities in its path that could not be entirely explained by Newton's law of gravitation. These irregularities could, however, be resolved if the gravity of a farther, unknown planet were disturbing its path around the Sun. In 1845 astronomers Urbain Le Verrier in Paris and John Couch Adams in Cambridge separately began calculations to determine the nature and position of such a planet. Le Verrier's success also led to a tense international dispute over priority, because shortly after the discovery George Airy, at the time British Astronomer Royal, announced that Adams had also predicted the discovery of the planet. Nevertheless, the Royal Society awarded Le Verrier the Copley medal in 1846 for his achievement, without mention of Adams.The discovery of Neptune led to the discovery of its moon Triton by William Lassell just seventeen days later.