Astronomy Club
... explanation about the orbit's inclination and number of comets with large period. But for almost all the comets with small period, orbit is not too much inclined with respect to the earth's orbit. To explain this difference in inclinations, it was suggested that initially all comets with large perio ...
... explanation about the orbit's inclination and number of comets with large period. But for almost all the comets with small period, orbit is not too much inclined with respect to the earth's orbit. To explain this difference in inclinations, it was suggested that initially all comets with large perio ...
The Interstellar Medium
... nebulae are blue. Why are these colors different from what Wien's law tells us about the radiation emitted by a blackbody? a. The gases in an emission nebula do not emit light like a blackbody. b. We see reflection nebulae by reflected light, not emitted light. c. The dust grains in reflection nebul ...
... nebulae are blue. Why are these colors different from what Wien's law tells us about the radiation emitted by a blackbody? a. The gases in an emission nebula do not emit light like a blackbody. b. We see reflection nebulae by reflected light, not emitted light. c. The dust grains in reflection nebul ...
Our galaxy, the Milky Way, has about 3 billion solar masses of HI
... priori” or can be determined. The luminosity of these objects must first be established by directly measuring their distance by some means such as stellar parallax or some other method. Once the luminosity a these stars are measured (by comparing their apparent magnitudes and their distance) and onc ...
... priori” or can be determined. The luminosity of these objects must first be established by directly measuring their distance by some means such as stellar parallax or some other method. Once the luminosity a these stars are measured (by comparing their apparent magnitudes and their distance) and onc ...
Planets and Moons - Fraser Heights Chess Club
... • Comet orbits are elliptical. It brings them close to the sun and takes them far away. • Short period comets orbit the Sun every 20 years or less. Long period comets orbit the Sun every 200 years or longer. Those comets with orbits in between are called Halley-type comets. • We see a comet's coma a ...
... • Comet orbits are elliptical. It brings them close to the sun and takes them far away. • Short period comets orbit the Sun every 20 years or less. Long period comets orbit the Sun every 200 years or longer. Those comets with orbits in between are called Halley-type comets. • We see a comet's coma a ...
The Search for Worlds Like Our Own
... occulting mechanism that would have the capability to observe different spectral signatures. It has become clear, however, that a complete study of a terrestrial exoplanet at interstellar distances would ultimately require complete spectral coverage. A step-wise approach to the problem would require ...
... occulting mechanism that would have the capability to observe different spectral signatures. It has become clear, however, that a complete study of a terrestrial exoplanet at interstellar distances would ultimately require complete spectral coverage. A step-wise approach to the problem would require ...
Chapter 6 The Solar System
... Kuiper belt objects more than 300 km in diameter (smaller asteroids, comets, and meteoroids) ...
... Kuiper belt objects more than 300 km in diameter (smaller asteroids, comets, and meteoroids) ...
PPT Format of Slides
... Kuiper belt objects more than 300 km in diameter (smaller asteroids, comets, and meteoroids) ...
... Kuiper belt objects more than 300 km in diameter (smaller asteroids, comets, and meteoroids) ...
Observing Nebulosities: The Cygnus Superbubble Chris
... of expanding interstellar matter are still not well understood. Since, within the Milky Way, Cygnus is located along the local Orion spur, star-forming structures at different distances are possibly located along the line of sight. Indeed, recent X-ray emission findings (Uyaniker et al. 2001) sugges ...
... of expanding interstellar matter are still not well understood. Since, within the Milky Way, Cygnus is located along the local Orion spur, star-forming structures at different distances are possibly located along the line of sight. Indeed, recent X-ray emission findings (Uyaniker et al. 2001) sugges ...
17 - Department of Physics and Astronomy
... The Oort cloud (continued) Such bodies would be small, cold, and far apart, and so very difficult to detect individually or collectively. Nevertheless the Oort cloud explains the long-period comets so well that it was immediately and generally accepted, and still is today. A massive trans-Neptu ...
... The Oort cloud (continued) Such bodies would be small, cold, and far apart, and so very difficult to detect individually or collectively. Nevertheless the Oort cloud explains the long-period comets so well that it was immediately and generally accepted, and still is today. A massive trans-Neptu ...
Falling Stars
... France and one was in America. They were each looking through telescopes. Both astronomers spotted the comet and reported their finding. The comet they found was not a big, bright comet. It is so small that it can only be seen with a telescope. The comet Tempel-Tuttle is about two-and-a-half miles i ...
... France and one was in America. They were each looking through telescopes. Both astronomers spotted the comet and reported their finding. The comet they found was not a big, bright comet. It is so small that it can only be seen with a telescope. The comet Tempel-Tuttle is about two-and-a-half miles i ...
Life on hot Jupiters
... • Until now, the only planets for which spectra were available belonged in our own solar system. The planets in the Spitzer studies orbit stars that are so far away, they are too faint to be seen with the naked eye. That means both planets are at least about a million times farther away from us than ...
... • Until now, the only planets for which spectra were available belonged in our own solar system. The planets in the Spitzer studies orbit stars that are so far away, they are too faint to be seen with the naked eye. That means both planets are at least about a million times farther away from us than ...
The astrobiological case for our cosmic ancestry
... form a dilute organic soup. It is from such a primordial soup that an undefined prebiotic chemistry is thought to have developed, leading eventually to an origin of the first selfreplicating cell. This Earth-centred scheme acquired a degree of credibility when Miller & Urey (1959) showed that a prebio ...
... form a dilute organic soup. It is from such a primordial soup that an undefined prebiotic chemistry is thought to have developed, leading eventually to an origin of the first selfreplicating cell. This Earth-centred scheme acquired a degree of credibility when Miller & Urey (1959) showed that a prebio ...
Slide 1
... White dwarfs have a population of cold, large radii, low mass, hard to detect Kuiper belt like discs. Observations find hot, dusty discs within tidal radius Can we link the two populations? Maybe the Kuiper-belts provide the reservoir of material required to replenish the hot discs? We just need a m ...
... White dwarfs have a population of cold, large radii, low mass, hard to detect Kuiper belt like discs. Observations find hot, dusty discs within tidal radius Can we link the two populations? Maybe the Kuiper-belts provide the reservoir of material required to replenish the hot discs? We just need a m ...
The gorilla connection
... giant planets than was previously believed. Microlensing is sensitive to planets that lie at a particular separation from a star when projected on the sky. This separation is about 2.5 au for typical lensing stars that have masses roughly half that of the Sun. Planets that lie far from this separati ...
... giant planets than was previously believed. Microlensing is sensitive to planets that lie at a particular separation from a star when projected on the sky. This separation is about 2.5 au for typical lensing stars that have masses roughly half that of the Sun. Planets that lie far from this separati ...
Collisions with Comets and Asteroids
... if the asteroid goes around the sun thrice in the same time that Jupiter orbits once, the planetÕs gravitational inßuence on the rock is greatly enhanced. Just as a child on a swing ßies ever higher if someone pushes her each time the swing returns, JupiterÕs rhythmic nudges ultimately cause the ast ...
... if the asteroid goes around the sun thrice in the same time that Jupiter orbits once, the planetÕs gravitational inßuence on the rock is greatly enhanced. Just as a child on a swing ßies ever higher if someone pushes her each time the swing returns, JupiterÕs rhythmic nudges ultimately cause the ast ...
Solar System Formation
... You will know the topic a week in advance. You will draw a mini-Mars each week. You will answer in order of your mini-Mars value. The value on your mini-Mars determines the number of points you can earn that round: 1-5 earns 3 points, 6-10 earns 4 points, 1115 earns 5 points. You may not re-use or r ...
... You will know the topic a week in advance. You will draw a mini-Mars each week. You will answer in order of your mini-Mars value. The value on your mini-Mars determines the number of points you can earn that round: 1-5 earns 3 points, 6-10 earns 4 points, 1115 earns 5 points. You may not re-use or r ...
Testing
... • We cannot measure an exact mass for a planet without knowing the tilt of its orbit, because Doppler shift tells us only the velocity toward or away from us • Doppler data gives us lower limits on masses ...
... • We cannot measure an exact mass for a planet without knowing the tilt of its orbit, because Doppler shift tells us only the velocity toward or away from us • Doppler data gives us lower limits on masses ...
Primordial Planet Formation - University of California San Diego
... from the plasma epoch transition to gas would fragment under viscous‐gravitational control to form planetary‐mass gas clouds in dense clumps of a trillion. Rather than planets forming from stars, all stars should form from these primordial gas planets within their protostarcluster clumps. ...
... from the plasma epoch transition to gas would fragment under viscous‐gravitational control to form planetary‐mass gas clouds in dense clumps of a trillion. Rather than planets forming from stars, all stars should form from these primordial gas planets within their protostarcluster clumps. ...
Lecture7_2014_v2
... • Measuring the relative amounts of the two isotopes and knowing the half life of the radioactive isotope tells us the age of the rock. Slide 68 ...
... • Measuring the relative amounts of the two isotopes and knowing the half life of the radioactive isotope tells us the age of the rock. Slide 68 ...
tremaine_stanford
... Arnold, Moser, etc. what is the fate of the Earth? where do asteroids and comets come from? why are there so few planets? calibration of geological timescale over the last 50 Myr can we explain the properties of extrasolar planetary systems? ...
... Arnold, Moser, etc. what is the fate of the Earth? where do asteroids and comets come from? why are there so few planets? calibration of geological timescale over the last 50 Myr can we explain the properties of extrasolar planetary systems? ...
Sternentstehung - Star Formation
... net gravitational force. (Rayleigh-Taylor instabilities naturally occur when heavy fluids (gas) are accelerated by light fluids (radiation).) ...
... net gravitational force. (Rayleigh-Taylor instabilities naturally occur when heavy fluids (gas) are accelerated by light fluids (radiation).) ...
Age Aspects of Habitability
... A habitable zone of a star is defined as a range of orbits within which a rocky planet can support liquid water on its surface. The most intriguing question driving the search for habitable planets is whether they host life. But is the age of the planet important for its habitability? If we define h ...
... A habitable zone of a star is defined as a range of orbits within which a rocky planet can support liquid water on its surface. The most intriguing question driving the search for habitable planets is whether they host life. But is the age of the planet important for its habitability? If we define h ...
class slides for Chapter 4
... The star Beta Pictoris is surrounded by a disk of warm matter, which may indicate planetary formation. ...
... The star Beta Pictoris is surrounded by a disk of warm matter, which may indicate planetary formation. ...
userfiles/602xxh/files/2013%e5%b1%8a%e9%ab%98%e4%b8%89
... The five planets that the scientists are most certain about are large—up to 25 times the size of Earth. According to Christophe Lovis, one of the scientists behind the finding, these five planets are similar to Neptune(海王星). “They’re made mainly of rocks and ice，” he said. “They’re probably not suit ...
... The five planets that the scientists are most certain about are large—up to 25 times the size of Earth. According to Christophe Lovis, one of the scientists behind the finding, these five planets are similar to Neptune(海王星). “They’re made mainly of rocks and ice，” he said. “They’re probably not suit ...
Lecture17-ASTA01
... and difficult to detect close to the glare of its star. • However, there are ways to find these planets. • To see how, all you have to do is imagine walking a dog. ...
... and difficult to detect close to the glare of its star. • However, there are ways to find these planets. • To see how, all you have to do is imagine walking a dog. ...