Project Description - SDSS-III
... small bodies in the solar system. Recent analyses by Madrid et al. (2006) and Madrid & Macchetto (2006) rate the SDSS as the most productive astronomical observatory in 2003 and 2004 based on citations to high-impact papers published in those years, ranking ahead of the European Southern Observatory ...
... small bodies in the solar system. Recent analyses by Madrid et al. (2006) and Madrid & Macchetto (2006) rate the SDSS as the most productive astronomical observatory in 2003 and 2004 based on citations to high-impact papers published in those years, ranking ahead of the European Southern Observatory ...
Astronomy 150 The Planets
... In this lab, we will be investigating four regions on the surface of Mars, that span the history of the planet. Each of the four regions are divided into 6 smaller regions that each have a surface area of 87,838 km2 . The total area of the 6 small regions is 527,028 km2 . At the upper right, and low ...
... In this lab, we will be investigating four regions on the surface of Mars, that span the history of the planet. Each of the four regions are divided into 6 smaller regions that each have a surface area of 87,838 km2 . The total area of the 6 small regions is 527,028 km2 . At the upper right, and low ...
3. What are the intrinsic and extrinsic environments of exoplanets?
... depend on the properties and behavior of the central star, the planet’s orbital characteristics and the exoplanet atmospheric and surface properties. Terrestrial exoplanets are likely to remain below the detection threshold for direct imaging for at least a decade, although they should be detected i ...
... depend on the properties and behavior of the central star, the planet’s orbital characteristics and the exoplanet atmospheric and surface properties. Terrestrial exoplanets are likely to remain below the detection threshold for direct imaging for at least a decade, although they should be detected i ...
Multiple scattering polarization
... m s−2 . The radii of brown dwarfs are almost independent of their age or mass and typically the same as the radius of Jupiter. 3.2 Extrasolar planets Since the discovery of the first confirmed extrasolar planet around the star 51 Pegasi in 1995, more than 500 planets around stars of various spectral ...
... m s−2 . The radii of brown dwarfs are almost independent of their age or mass and typically the same as the radius of Jupiter. 3.2 Extrasolar planets Since the discovery of the first confirmed extrasolar planet around the star 51 Pegasi in 1995, more than 500 planets around stars of various spectral ...
DUSTY CIRCUMSTELLAR DISKS B. Zuckerman
... giants and white dwarfs. Surprisingly, a small percentage of such stars appears to be surrounded by orbiting dusty disks. The origins of most of these disks are mysteries whose eventual understanding will, no doubt, reveal interesting and important astronomical phenomena. Following discussion of ste ...
... giants and white dwarfs. Surprisingly, a small percentage of such stars appears to be surrounded by orbiting dusty disks. The origins of most of these disks are mysteries whose eventual understanding will, no doubt, reveal interesting and important astronomical phenomena. Following discussion of ste ...
Introduction
... was made by monitoring variations in the radial velocity of a star (Mayor & Queloz, 1995). This exoplanet, 51 Pegasi b, is classified as a Hot Jupiter as it is similar in mass to Jupiter (half the mass) and it orbits close to its star (about 8 times closer than Mercury orbits the Sun). The discovery ...
... was made by monitoring variations in the radial velocity of a star (Mayor & Queloz, 1995). This exoplanet, 51 Pegasi b, is classified as a Hot Jupiter as it is similar in mass to Jupiter (half the mass) and it orbits close to its star (about 8 times closer than Mercury orbits the Sun). The discovery ...
A COMPREHENSIVE COMPARISON OF THE SUN TO
... above the solar value ( Table 3). This can also be done by a joint analysis of multiple parameters ( Table 2). If there are several subtle factors that have some influence over habitability, a quantitative joint analysis of the Sun’s properties may allow us to identify these factors without invoking ...
... above the solar value ( Table 3). This can also be done by a joint analysis of multiple parameters ( Table 2). If there are several subtle factors that have some influence over habitability, a quantitative joint analysis of the Sun’s properties may allow us to identify these factors without invoking ...
Debris disks and the search for life in the universe Gianni Cataldi
... These objects have typical masses of 104 –106 M and sizes between 10 and 100 pc (Natta 2000). The densest parts of GMCs are called cores and are characterised by a typical size of 0.1 pc, a H2 number density of 104 –105 cm−3 , and masses of a few solar masses (Natta 2000). The number density encoun ...
... These objects have typical masses of 104 –106 M and sizes between 10 and 100 pc (Natta 2000). The densest parts of GMCs are called cores and are characterised by a typical size of 0.1 pc, a H2 number density of 104 –105 cm−3 , and masses of a few solar masses (Natta 2000). The number density encoun ...
Constraints on a Chance Universe & The Anthropic Principle
... The fraction of planets in a star’s habitable zone can be reasonably estimated from our own solar system. If we take the sun’s HZ to be 1.0 AU 0.3 AU in a solar system ranging out to more than 40 AU, we can estimate the fraction as 1.3/40 or ~ 0.027. However, as we will see our solar system is not ...
... The fraction of planets in a star’s habitable zone can be reasonably estimated from our own solar system. If we take the sun’s HZ to be 1.0 AU 0.3 AU in a solar system ranging out to more than 40 AU, we can estimate the fraction as 1.3/40 or ~ 0.027. However, as we will see our solar system is not ...
File
... develop an interest in astrology because of its constant play in the media and simply don’t have the background in science to know the problems with it. The revelation in the 1980’s that daily schedules in the Reagan White House were arranged and rearranged based on the predictions of a San Francisc ...
... develop an interest in astrology because of its constant play in the media and simply don’t have the background in science to know the problems with it. The revelation in the 1980’s that daily schedules in the Reagan White House were arranged and rearranged based on the predictions of a San Francisc ...
Astronomical Geography: An Examination of the Early American
... In the 1814 edition of Modern Geography, Morse's section on " fixed stars" proposed larger numbers of stars than earlier geog raphies : " The fixed stars . .. are found to be collected in clusters. When a small magnifying power is used, these clusters appear like small light clouds, and hence have b ...
... In the 1814 edition of Modern Geography, Morse's section on " fixed stars" proposed larger numbers of stars than earlier geog raphies : " The fixed stars . .. are found to be collected in clusters. When a small magnifying power is used, these clusters appear like small light clouds, and hence have b ...
Discovery and spectroscopy of the young Jovian planet
... (35). This constrained fit gives an effective temperature of 750K, with a radius (0.76 RJ) and surface gravity similar to an old (10 Gyr), high-mass brown dwarf. A similar though less extreme result – small radii and hence high masses and old ages – is found in several model fits to the HR8799 obse ...
... (35). This constrained fit gives an effective temperature of 750K, with a radius (0.76 RJ) and surface gravity similar to an old (10 Gyr), high-mass brown dwarf. A similar though less extreme result – small radii and hence high masses and old ages – is found in several model fits to the HR8799 obse ...
arXiv:astro-ph/0508448v1 22 Aug 2005
... Galactic latitudes which require high velocities if they were formed in the plane in order to reach their current locations within their lifetimes (Conlon et al. 1992, Allen & Kinman 2004). In this paper we take the threshold velocity for a star to be deemed runaway to be 30 kms−1 . Despite their hi ...
... Galactic latitudes which require high velocities if they were formed in the plane in order to reach their current locations within their lifetimes (Conlon et al. 1992, Allen & Kinman 2004). In this paper we take the threshold velocity for a star to be deemed runaway to be 30 kms−1 . Despite their hi ...
Shortв•`lived radioactivity in the early solar system: The Superв•`AGB
... evolution of galaxies may be. However, irrefutable proof that a significant number of stars go through the SuperAGB phase is provided by the observational evidence that many nova outbursts involve the presence of O–Ne white dwarves (Gil-Pons et al. 2003), which are the direct progeny of Super-AGB sta ...
... evolution of galaxies may be. However, irrefutable proof that a significant number of stars go through the SuperAGB phase is provided by the observational evidence that many nova outbursts involve the presence of O–Ne white dwarves (Gil-Pons et al. 2003), which are the direct progeny of Super-AGB sta ...
Nulling Interferometer
... stars and Herbig Ae/Be stars. Disk would be only 0.2” across, so too small for direct imaging detection, but would not have a null of < 40\%. ...
... stars and Herbig Ae/Be stars. Disk would be only 0.2” across, so too small for direct imaging detection, but would not have a null of < 40\%. ...
Dynamics of small bodies in planetary systems
... belt and Kuiper belt. These were first discovered using far-IR observations of nearby stars, which showed excess emission above that expected to come from the stellar photosphere [5]. This emission comes from dust that is heated by the star and which re-radiates that energy in the thermal infrared, ...
... belt and Kuiper belt. These were first discovered using far-IR observations of nearby stars, which showed excess emission above that expected to come from the stellar photosphere [5]. This emission comes from dust that is heated by the star and which re-radiates that energy in the thermal infrared, ...
High-precision abundances of elements in solar twin stars: Trends
... cleansing of dust before the stars formed. According to this, the Sun may have formed in a dense stellar environment contrary to most of the solar twins. Similar scenarios are discussed by Gaidos (2015), who suggests that [X/Fe]-T C correlations can be explained by dust-gas segregation in circumstel ...
... cleansing of dust before the stars formed. According to this, the Sun may have formed in a dense stellar environment contrary to most of the solar twins. Similar scenarios are discussed by Gaidos (2015), who suggests that [X/Fe]-T C correlations can be explained by dust-gas segregation in circumstel ...
8-4.9 - S2TEM Centers SC
... 2. Ask them to share what they know about it. 3. Make sure they are aware that a galaxy is a very large collection of stars, dust, and gas held together by the force of gravity. They should also be aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and t ...
... 2. Ask them to share what they know about it. 3. Make sure they are aware that a galaxy is a very large collection of stars, dust, and gas held together by the force of gravity. They should also be aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and t ...
ISA_lecture01 - School of Physics
... forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit. A “dwarf planet” is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a ...
... forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit. A “dwarf planet” is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a ...
There are four terrestrial and four jovian planets.
... — The bombardment of newly formed planets by planetesimals may explain the exceptions. — Material torn from Earth’s crust by a giant impact formed the Moon. • When did the planets form? — Radiometric dating indicates that planets formed 4.5 ...
... — The bombardment of newly formed planets by planetesimals may explain the exceptions. — Material torn from Earth’s crust by a giant impact formed the Moon. • When did the planets form? — Radiometric dating indicates that planets formed 4.5 ...
Alpha Centauri
... Never viewed from northern latitudes(around 40 degrees) Traveling south below the earths surface, across the equator you will see it. ...
... Never viewed from northern latitudes(around 40 degrees) Traveling south below the earths surface, across the equator you will see it. ...
Metal-poor Stars
... presented in the figure, in a spectrum of a similarly unevolved Population III object, no metal features would be detectable since it contains no elements other than H, He and Li at its surface. Large numbers of metal-poor Galactic stars found in objective-prism surveys in both hemispheres have prov ...
... presented in the figure, in a spectrum of a similarly unevolved Population III object, no metal features would be detectable since it contains no elements other than H, He and Li at its surface. Large numbers of metal-poor Galactic stars found in objective-prism surveys in both hemispheres have prov ...
astronomy (astr)
... or 119; Permission of the instructor for students lacking the pre- or corequisites. Gen Ed: PL. Grading status: Letter grade. ASTR 102H. Introduction to Astronomy: Stars, Galaxies & Cosmology. 3 Credits. The sun, stellar observables, star birth, evolution, and death, novae and supernovae, white dwar ...
... or 119; Permission of the instructor for students lacking the pre- or corequisites. Gen Ed: PL. Grading status: Letter grade. ASTR 102H. Introduction to Astronomy: Stars, Galaxies & Cosmology. 3 Credits. The sun, stellar observables, star birth, evolution, and death, novae and supernovae, white dwar ...
10. Atmospheres of Planets and of Exoplanets - ETH E
... gases, namely Sulfurdioxide (H2SO4): 150 ppm), Argon (Ar: 70 ppm), Water (H2O: 20 pp), Carbonmonoxide (CO: 17 ppm); Helium (He: 12 ppm), and Neon (Ne: 7 ppm) (s. right-hand Figure). Because of the large total amount of mass, it contains about five times as much Nitroge as in the Earth’s Atmosphere a ...
... gases, namely Sulfurdioxide (H2SO4): 150 ppm), Argon (Ar: 70 ppm), Water (H2O: 20 pp), Carbonmonoxide (CO: 17 ppm); Helium (He: 12 ppm), and Neon (Ne: 7 ppm) (s. right-hand Figure). Because of the large total amount of mass, it contains about five times as much Nitroge as in the Earth’s Atmosphere a ...
Planetary system
A planetary system is a set of gravitationally bound non-stellar objects in orbit around a star or star system. Generally speaking, systems with one or more planets constitute a planetary system, although such systems may also consist of bodies such as dwarf planets, asteroids, natural satellites, meteoroids, comets, planetesimals and circumstellar disks. The Sun together with its planetary system, which includes Earth, is known as the Solar System. The term exoplanetary system is sometimes used in reference to other planetary systems.A total of 1968 exoplanets (in 1248 planetary systems, including 490 multiple planetary systems) have been identified as of 1 October 2015.Of particular interest to astrobiology is the habitable zone of planetary systems where planets could have surface liquid water.