Ben R. Oppenheimer1,2 and Sasha Hinkley1,2
... is given in Udry & Santos (2007). These surveys find that about 1% of stars have “hot jupiters” in extremely short orbits, while about 5-11% of stars roughly similar to the Sun have planets orbiting them (Udry & Santos 2007, Cumming et al. 2008). Also, 25% of higher metallicity stars ([Fe/H] > 0.3) ...
... is given in Udry & Santos (2007). These surveys find that about 1% of stars have “hot jupiters” in extremely short orbits, while about 5-11% of stars roughly similar to the Sun have planets orbiting them (Udry & Santos 2007, Cumming et al. 2008). Also, 25% of higher metallicity stars ([Fe/H] > 0.3) ...
Comet - Physics
... • Usually they will start with an orbit which takes them to the gas giant region. Here the objects will be called Centaurs. • Eventually these Centaurs will have a close encounter with a gas giant (don’t worry Jupiter, I ...
... • Usually they will start with an orbit which takes them to the gas giant region. Here the objects will be called Centaurs. • Eventually these Centaurs will have a close encounter with a gas giant (don’t worry Jupiter, I ...
course objectives - Metropolitan Community College
... COURSE DESCRIPTION: This course is an introductory course in astronomy that covers the tools of astronomy, the night sky, the solar system, stars and star systems, galaxies, and cosmology. This is a lecture-only course. The lab course that complements this course is SCIE 1310. ...
... COURSE DESCRIPTION: This course is an introductory course in astronomy that covers the tools of astronomy, the night sky, the solar system, stars and star systems, galaxies, and cosmology. This is a lecture-only course. The lab course that complements this course is SCIE 1310. ...
Arguments for the presence of a distant large
... number of cometary orbits of sufficient accuracy for the present analysis is small, only 13, but the probability of the cluster in Fig. 2 occurring by chance is less than 0.0006 (see the appendix). It is possible that some of these comets were not perturbed by the unknown planet and lie within the s ...
... number of cometary orbits of sufficient accuracy for the present analysis is small, only 13, but the probability of the cluster in Fig. 2 occurring by chance is less than 0.0006 (see the appendix). It is possible that some of these comets were not perturbed by the unknown planet and lie within the s ...
Arguments for the presence of a distant large undiscovered Solar
... number of cometary orbits of sufficient accuracy for the present analysis is small, only 13, but the probability of the cluster in Fig. 2 occurring by chance is less than 0.0006 (see the appendix). It is possible that some of these comets were not perturbed by the unknown planet and lie within the s ...
... number of cometary orbits of sufficient accuracy for the present analysis is small, only 13, but the probability of the cluster in Fig. 2 occurring by chance is less than 0.0006 (see the appendix). It is possible that some of these comets were not perturbed by the unknown planet and lie within the s ...
Arguments for the presence of a distant large undiscovered Solar
... number of cometary orbits of sufficient accuracy for the present analysis is small, only 13, but the probability of the cluster in Fig. 2 occurring by chance is less than 0.0006 (see the appendix). It is possible that some of these comets were not perturbed by the unknown planet and lie within the s ...
... number of cometary orbits of sufficient accuracy for the present analysis is small, only 13, but the probability of the cluster in Fig. 2 occurring by chance is less than 0.0006 (see the appendix). It is possible that some of these comets were not perturbed by the unknown planet and lie within the s ...
Science Across Disciplines
... The discovery of extra-solar planets is one of the greatest achievements of modern astronomy. There are now more than two hundred such objects known, and the recent detection of planets with masses approximately 5 times that of Earth demonstrates that extra-solar planets of low mass exist. In additi ...
... The discovery of extra-solar planets is one of the greatest achievements of modern astronomy. There are now more than two hundred such objects known, and the recent detection of planets with masses approximately 5 times that of Earth demonstrates that extra-solar planets of low mass exist. In additi ...
Alpha Centauri 3
... consideration of interior seismic constraints, Star A (and B) has been estimated to be older than Sol, from 4.85 billion years in age (ESO), to around 7.6 (+/around 10 percent) billion years or more -- or 6.8 billion years if it does not have a convective core (Guenther and Demarque, 2000); however, ...
... consideration of interior seismic constraints, Star A (and B) has been estimated to be older than Sol, from 4.85 billion years in age (ESO), to around 7.6 (+/around 10 percent) billion years or more -- or 6.8 billion years if it does not have a convective core (Guenther and Demarque, 2000); however, ...
Chap1-Introduction - Groupe d`astrophysique de UdeM
... Similar technique to RV but Doppler (timing) measurement is made on a periodic signal intrinsic to the star/system, e.g., pulsars, oscillating stars (WD, sDB) and eclipsing binaries. Specific timing methods for transiting systems: • TTV (Transit Time Variation) for detecting multiple systems. • ...
... Similar technique to RV but Doppler (timing) measurement is made on a periodic signal intrinsic to the star/system, e.g., pulsars, oscillating stars (WD, sDB) and eclipsing binaries. Specific timing methods for transiting systems: • TTV (Transit Time Variation) for detecting multiple systems. • ...
The Astrophysics of Planetary Habitability
... P2.7. Stellar prominence oscillations and eruptions: The cases of HK Aqr and PZ Tel . . . . . . . . . . . . . . . . . . . . . . . . . . . . P2.8. First Results from the MUSCLES Treasury Survey of the UV and X-ray Emission from K and M Dwarf Stars that Host Exoplanets . P2.9. The variations of tidal ...
... P2.7. Stellar prominence oscillations and eruptions: The cases of HK Aqr and PZ Tel . . . . . . . . . . . . . . . . . . . . . . . . . . . . P2.8. First Results from the MUSCLES Treasury Survey of the UV and X-ray Emission from K and M Dwarf Stars that Host Exoplanets . P2.9. The variations of tidal ...
Name:
... diagram is shown to the upper right. Note that is a graph showing luminosity versus temperature. Note, too, that the luminosity is in terms of solar luminosities (Lo). That is, if a star has a luminosity of 10Lo, it will be ten times brighter than our sun. The temperature is given in Kelvins (K), a ...
... diagram is shown to the upper right. Note that is a graph showing luminosity versus temperature. Note, too, that the luminosity is in terms of solar luminosities (Lo). That is, if a star has a luminosity of 10Lo, it will be ten times brighter than our sun. The temperature is given in Kelvins (K), a ...
13. Remnants of Rock and Ice: Asteroids, Comets, and Pluto
... • Both its composition and orbit are more similar to Kuiper belt comets than to other planets. Even its size is not that much bigger than other known Kuiper belt comets, and it is smaller than one object that almost certainly once roamed the Kuiper belt – Neptune’s moon Triton. © 2004 Pearson Educat ...
... • Both its composition and orbit are more similar to Kuiper belt comets than to other planets. Even its size is not that much bigger than other known Kuiper belt comets, and it is smaller than one object that almost certainly once roamed the Kuiper belt – Neptune’s moon Triton. © 2004 Pearson Educat ...
oC - Geogreenapps
... time doing any kind of justioe to the eubject on the iDtermediate pages, is altogether chimerical. It would be too much like a farm, one-half of which was devoted to a flower-prden; or like lOme of our illastrated holiday-pape1'8. 3. The leading deeign being to furnish an available text-book of A.st ...
... time doing any kind of justioe to the eubject on the iDtermediate pages, is altogether chimerical. It would be too much like a farm, one-half of which was devoted to a flower-prden; or like lOme of our illastrated holiday-pape1'8. 3. The leading deeign being to furnish an available text-book of A.st ...
Habitable Zone Lifetimes of Exoplanets around Main Sequence Stars
... time or space, and its boundaries migrate outward at a rate proportional to the increase in luminosity of a star undergoing stellar evolution, possibly including or excluding planets over the course of the star’s main sequence lifetime. We describe the time that a planet spends within the HZ as its ...
... time or space, and its boundaries migrate outward at a rate proportional to the increase in luminosity of a star undergoing stellar evolution, possibly including or excluding planets over the course of the star’s main sequence lifetime. We describe the time that a planet spends within the HZ as its ...
Teacher Resource Guide - Sci-Port
... Formaldehyde (HCHO)— A chemical compound consisting of four atoms: two of hydrogen, one of carbon, and one of oxygen. At standard temperature and pressure on Earth, formaldehyde is a liquid. In the cold vacuum of space, it is a solid; when hit by sunlight, it becomes a gas. Formaldehyde has been obs ...
... Formaldehyde (HCHO)— A chemical compound consisting of four atoms: two of hydrogen, one of carbon, and one of oxygen. At standard temperature and pressure on Earth, formaldehyde is a liquid. In the cold vacuum of space, it is a solid; when hit by sunlight, it becomes a gas. Formaldehyde has been obs ...
A radiogenic heating evolution model for cosmochemically Earth
... half-life comparable to the age of the Universe, 232Th has lost a mere 20% of its original abundance since tss, while 40K has lost 90%. When Earth reaches an age of ca. 10 Gyr, its radiogenic heat production will be 15% of what it was at tss. At that time, 40K will no longer be a heat contributor ...
... half-life comparable to the age of the Universe, 232Th has lost a mere 20% of its original abundance since tss, while 40K has lost 90%. When Earth reaches an age of ca. 10 Gyr, its radiogenic heat production will be 15% of what it was at tss. At that time, 40K will no longer be a heat contributor ...
Ch21: Moon and Mercury
... the exploration of the planets. In this chapter, we begin that detailed study with two goals in mind. First, we search for evidence to test the solar nebula hypothesis for the formation of the solar system. Second, we search for an understanding of how planets evolve once they have formed. The moon ...
... the exploration of the planets. In this chapter, we begin that detailed study with two goals in mind. First, we search for evidence to test the solar nebula hypothesis for the formation of the solar system. Second, we search for an understanding of how planets evolve once they have formed. The moon ...
Activity 1 - National Science Teachers Association
... For the first time, we can compare their geological and meteorological conditions with those of Earth. As scientists accumulate this new data, it also reveals how life, as we know it, is unique to Earth. The space program has given us a snapshot of our own blue and white planet as photographed by jo ...
... For the first time, we can compare their geological and meteorological conditions with those of Earth. As scientists accumulate this new data, it also reveals how life, as we know it, is unique to Earth. The space program has given us a snapshot of our own blue and white planet as photographed by jo ...
Alpha Centauri
... Alpha Centauri Was often called Rigel Kentaurus. Rigel Kentaurus means “foot of the centaur” in Arabic. ...
... Alpha Centauri Was often called Rigel Kentaurus. Rigel Kentaurus means “foot of the centaur” in Arabic. ...
Mercury - Dimensional Facts
... Between 1609 and 1618, the German astronomer Johannes Kepler determined the orbital motion of the planets, which calculated how the planets revolved around the Sun. This discovery allowed Kepler to predict when and where Mercury would be in the sky, and also when it would pass between the Sun and Ea ...
... Between 1609 and 1618, the German astronomer Johannes Kepler determined the orbital motion of the planets, which calculated how the planets revolved around the Sun. This discovery allowed Kepler to predict when and where Mercury would be in the sky, and also when it would pass between the Sun and Ea ...
New Phenomena: Recent Results and Prospects from the Fermilab
... • It took awhile, but they eventually figured out that the motion of the planets made much more sense if one assumed that the Sun was the center of motion rather than the Earth • Then Kepler made some important observations WAY before Newton ...
... • It took awhile, but they eventually figured out that the motion of the planets made much more sense if one assumed that the Sun was the center of motion rather than the Earth • Then Kepler made some important observations WAY before Newton ...
Migration of giant planets in planetesimal discs
... of which are Jupiter-mass objects, are difficult to explain using the quoted standard model for planet formation (Lissauer 1993; Boss 1995). This standard model predicts nearly circular planetary orbits, and giant planets with orbital distances $1 au from the central star, at which distance the temp ...
... of which are Jupiter-mass objects, are difficult to explain using the quoted standard model for planet formation (Lissauer 1993; Boss 1995). This standard model predicts nearly circular planetary orbits, and giant planets with orbital distances $1 au from the central star, at which distance the temp ...
Comet-like tail-formation of exospheres of hot rocky exoplanets
... study the thermal evaporation of hydrogen-rich exoplanets by applying a mass loss formula which includes Roche Lobe effects, heating efficiencies, etc. and are in agreement with hydrodynamic model results during evolutionary epochs (Penz et al., 2008). Leitzinger et al. (2009) placed virtual exoplane ...
... study the thermal evaporation of hydrogen-rich exoplanets by applying a mass loss formula which includes Roche Lobe effects, heating efficiencies, etc. and are in agreement with hydrodynamic model results during evolutionary epochs (Penz et al., 2008). Leitzinger et al. (2009) placed virtual exoplane ...
Luminosities and magnitudes of stars
... Luminosity is energy passing through closed surface encompassing the source (units watts) Luminosity L = IdAdd If source (star) radiates isotropically, its radiation at distance r is evenly distributed on a spherical surface of area 4 r2 Flux is then F = L / 4 r2 (w m-2) Fig 4.3. An ener ...
... Luminosity is energy passing through closed surface encompassing the source (units watts) Luminosity L = IdAdd If source (star) radiates isotropically, its radiation at distance r is evenly distributed on a spherical surface of area 4 r2 Flux is then F = L / 4 r2 (w m-2) Fig 4.3. An ener ...
100 Characteristics of Earth Reasons for the
... mass, such as the Earth, goes around another mass, such as the Sun) ...
... mass, such as the Earth, goes around another mass, such as the Sun) ...
Orrery
An orrery is a mechanical model of the solar system that illustrates or predicts the relative positions and motions of the planets and moons, usually according to the heliocentric model. It may also represent the relative sizes of these bodies; but since accurate scaling is often not practical due to the actual large ratio differences, a subdued approximation may be used instead. Though the Greeks had working planetaria, the first orrery that was a planetarium of the modern era was produced in 1704, and one was presented to Charles Boyle, 4th Earl of Orrery — whence came the name. They are typically driven by a clockwork mechanism with a globe representing the Sun at the centre, and with a planet at the end of each of the arms.