Live from McDonald Observatory: Observing Venus: explore how it
... an important discovery because as the videoconference facilitator will demonstrate, for us to see an entire cycle of phases, Venus must orbit the Sun. Your students have begun to make the same gr ...
... an important discovery because as the videoconference facilitator will demonstrate, for us to see an entire cycle of phases, Venus must orbit the Sun. Your students have begun to make the same gr ...
ASTRONOMY AND ASTROPHYSICS (ASTRO)
... CCD photometry. Emphasis on projects involving proficiency in the use of research telescopes and modern instrumentation. Project topics range from photometric studies of pulsating and binary star systems to deep CCD imaging of faint nebulae and galaxies. ASTRO 580: Stellar Astrophysics (3-0) Cr. 3. ...
... CCD photometry. Emphasis on projects involving proficiency in the use of research telescopes and modern instrumentation. Project topics range from photometric studies of pulsating and binary star systems to deep CCD imaging of faint nebulae and galaxies. ASTRO 580: Stellar Astrophysics (3-0) Cr. 3. ...
Particle-Gas Dynamics and Primary Accretion
... (LL3) were notably smaller than whole chondrules in Bishunpur; however, their Table 2 reveals that chondrules and fragments generally cover the same size range, with aerodynamic differences possibly attributable to shape. As did Dodd (1976) for UOCs, Skinner and Leenhouts (1993) showed that metal an ...
... (LL3) were notably smaller than whole chondrules in Bishunpur; however, their Table 2 reveals that chondrules and fragments generally cover the same size range, with aerodynamic differences possibly attributable to shape. As did Dodd (1976) for UOCs, Skinner and Leenhouts (1993) showed that metal an ...
Etymology - Link Observatory
... Solar System, the dust reflecting sunlight directly and the gases glowing from ionisation. Most comets are too faint to be visible without the aid of a telescope, but a few each decade become bright enough to be visible to the naked eye. Occasionally a comet may experience a huge and sudden outburst ...
... Solar System, the dust reflecting sunlight directly and the gases glowing from ionisation. Most comets are too faint to be visible without the aid of a telescope, but a few each decade become bright enough to be visible to the naked eye. Occasionally a comet may experience a huge and sudden outburst ...
Debris Disks: Seeing Dust, Thinking of Planetesimals and Planets
... the strong perturbations by the nearby Jupiter (e.g., Safronov, 1969; Wetherill, 1980). The EdgeworthKuiper Belt (EKB) exterior to the Neptune orbit is built up by planetesimals that did not form planets because the density of the outer solar nebula was too low (e.g., Safronov, 1969; Lissauer, 1987; ...
... the strong perturbations by the nearby Jupiter (e.g., Safronov, 1969; Wetherill, 1980). The EdgeworthKuiper Belt (EKB) exterior to the Neptune orbit is built up by planetesimals that did not form planets because the density of the outer solar nebula was too low (e.g., Safronov, 1969; Lissauer, 1987; ...
r202 the new astronomy
... magnitude. Since dark matter appears to make up to 90% of the mass of the Universe, it presents us with one of the most fundamental problems in astrophysics. The idea that the Universe might contain much more mass than can be seen in gas, stars and their remnants has been with us for over 50 years. ...
... magnitude. Since dark matter appears to make up to 90% of the mass of the Universe, it presents us with one of the most fundamental problems in astrophysics. The idea that the Universe might contain much more mass than can be seen in gas, stars and their remnants has been with us for over 50 years. ...
Gresham College
... of rubble left over from the building of the Solar System. But while some cosmic rubble is rocky (like the asteroids), comets are basically icy. They are frozen fragments of the giant gas and dust cloud that formed the Sun and planets nearly 5 billion years ago. In their natural state - frozen balls ...
... of rubble left over from the building of the Solar System. But while some cosmic rubble is rocky (like the asteroids), comets are basically icy. They are frozen fragments of the giant gas and dust cloud that formed the Sun and planets nearly 5 billion years ago. In their natural state - frozen balls ...
Worlds Beyond: A Strategy for the Detection and Characterization of
... technology development across different wavelengths and techniques. Once Earth-mass planets are known to orbit nearby sun-like stars, the Task Force recommends launching a direct imaging space mission for habitability characterization. The hierarchy of pressing questions in the search for Earth anal ...
... technology development across different wavelengths and techniques. Once Earth-mass planets are known to orbit nearby sun-like stars, the Task Force recommends launching a direct imaging space mission for habitability characterization. The hierarchy of pressing questions in the search for Earth anal ...
Discovery and spectroscopy of the young Jovian planet
... other young (<100 Myr) planetary-mass companions, has a low enough luminosity low to be consistent with cold-start core accretion scenarios. In cold-start evolution, luminosity at 20 Myr age is nearly independent of mass, so the mass of 51 Eri b would be between 2 and 12 MJup. 51 Eri b and the GJ 33 ...
... other young (<100 Myr) planetary-mass companions, has a low enough luminosity low to be consistent with cold-start core accretion scenarios. In cold-start evolution, luminosity at 20 Myr age is nearly independent of mass, so the mass of 51 Eri b would be between 2 and 12 MJup. 51 Eri b and the GJ 33 ...
Document
... If a massive additional body with a shorter perturbation timescale exists, Kozai migration due to the binary cannot occur (Innanen et al. 1997, Wu and Murray 2003) conditional equation: (smaller bodies are allowed) ...
... If a massive additional body with a shorter perturbation timescale exists, Kozai migration due to the binary cannot occur (Innanen et al. 1997, Wu and Murray 2003) conditional equation: (smaller bodies are allowed) ...
The Evolution of Isotope Ratios in the Milky Way Galaxy
... Isotope ratios have opened a new window into the study of the details of stellar evolution, supernovae, and galactic chemical evolution. We present the evolution of the isotope ratios of elemental abundances (from C to Zn) in the solar neighbourhood, bulge, halo, and thick disk, using chemical evolu ...
... Isotope ratios have opened a new window into the study of the details of stellar evolution, supernovae, and galactic chemical evolution. We present the evolution of the isotope ratios of elemental abundances (from C to Zn) in the solar neighbourhood, bulge, halo, and thick disk, using chemical evolu ...
Astronomy and Stonehenge
... It is not the aim of this paper to attempt new cosmological interpretations but rather to consider certain evidence on the nature of astronomical observations made at Stonehenge, encapsulated in some way in the material record, that may bear directly upon some broader issues of current interest. The ...
... It is not the aim of this paper to attempt new cosmological interpretations but rather to consider certain evidence on the nature of astronomical observations made at Stonehenge, encapsulated in some way in the material record, that may bear directly upon some broader issues of current interest. The ...
TWO NEW LONG-PERIOD GIANT PLANETS FROM THE
... capable of detecting planets across a range of masses and orbits analogous to those of the planets in our solar system, a definitive answer will be beyond our reach. However, as a next step we might instead ask,“How common are Jupiter analogs?”—gas giant planets that have either not significantly mig ...
... capable of detecting planets across a range of masses and orbits analogous to those of the planets in our solar system, a definitive answer will be beyond our reach. However, as a next step we might instead ask,“How common are Jupiter analogs?”—gas giant planets that have either not significantly mig ...
Preview Sample 1
... 26. Several other objects (Juno, Vesta, Pallas etc.) were found within a few 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. ...
... 26. Several other objects (Juno, Vesta, Pallas etc.) were found within a few 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. ...
Pluto http://cseligman.com/text/planets/pluto.htm Pluto / The Rotation
... occultation, and its axis of rotation must be pointing nearly at the Sun (and away from it) about a quarter of an orbital period earlier and later -- in other words, 1988/9 plus or minus 62 years, or 1926/7, and 2050/51. This means that when Pluto was discovered, in 1930, one hemisphere was more or ...
... occultation, and its axis of rotation must be pointing nearly at the Sun (and away from it) about a quarter of an orbital period earlier and later -- in other words, 1988/9 plus or minus 62 years, or 1926/7, and 2050/51. This means that when Pluto was discovered, in 1930, one hemisphere was more or ...
The Secular and Rotational Brightness Variations of Neptune
... and Venus (Mallama et al. 2006) were observed with the Solar and Heliospheric Observatory satellite. The SOHO magnitudes augmented ground-based observations at illumination phases where the planets are too near the Sun to observe through the atmosphere. Mercury was found to have a very strong bright ...
... and Venus (Mallama et al. 2006) were observed with the Solar and Heliospheric Observatory satellite. The SOHO magnitudes augmented ground-based observations at illumination phases where the planets are too near the Sun to observe through the atmosphere. Mercury was found to have a very strong bright ...
Full Program with Abstracts - CIERA
... 100.04 – Kepler & K2: One spacecraft, Two Missions This year, we mark twenty years of exploring the diversity of planets and planetary systems orbiting main sequence stars. Exoplanet discoveries spill into the thousands, and the sensitivity boundaries continue to expand. NASA's Kepler Mission unveil ...
... 100.04 – Kepler & K2: One spacecraft, Two Missions This year, we mark twenty years of exploring the diversity of planets and planetary systems orbiting main sequence stars. Exoplanet discoveries spill into the thousands, and the sensitivity boundaries continue to expand. NASA's Kepler Mission unveil ...
Introduction to Planetary Science
... stars in the Milky Way galaxy to continue to form and evolve. In addition, we relate the evolution of stars to the synthesis of chemical elements by the nuclear reactions which release the energy that stars radiate into interstellar space. We simplify this complex subject by emphasizing the main eve ...
... stars in the Milky Way galaxy to continue to form and evolve. In addition, we relate the evolution of stars to the synthesis of chemical elements by the nuclear reactions which release the energy that stars radiate into interstellar space. We simplify this complex subject by emphasizing the main eve ...
Part I - User Web Areas at the University of York
... 1000 tonnes of heavy water in a 12 metre diameter transparent acrylic sphere viewed by approximately 9,600 PMTs 2 km underground in Ontario, Canada. Detection rate is about one neutrino per hour. Turned on in 1999 and was turned off on in 2006 although analysis of the data recorded still continues. ...
... 1000 tonnes of heavy water in a 12 metre diameter transparent acrylic sphere viewed by approximately 9,600 PMTs 2 km underground in Ontario, Canada. Detection rate is about one neutrino per hour. Turned on in 1999 and was turned off on in 2006 although analysis of the data recorded still continues. ...
Carl Sagan - Cosmos (1980) [Full Color Illustrated
... Our ancestors were eager to understand the world but had not quite stumbled upon the method. They imagined a small, quaint, tidy universe in which the dominant forces were gods like Anu, Ea, and Shamash. In that universe humans played an important if not a central role. We were intimately bound up w ...
... Our ancestors were eager to understand the world but had not quite stumbled upon the method. They imagined a small, quaint, tidy universe in which the dominant forces were gods like Anu, Ea, and Shamash. In that universe humans played an important if not a central role. We were intimately bound up w ...
Formation and evolution of the Solar System
The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.