The closest extrasolar planet: A giant planet around the M4 dwarf Gl
... identify close analogs to our own solar system, which could perhaps contain life sustaining planets. Also, the selection function of the radial velocity planet searches has a relatively sharp optimum around spectral class G. Essentially all stars hotter than approximately F5 have fast rotation (Wolf ...
... identify close analogs to our own solar system, which could perhaps contain life sustaining planets. Also, the selection function of the radial velocity planet searches has a relatively sharp optimum around spectral class G. Essentially all stars hotter than approximately F5 have fast rotation (Wolf ...
PH607 – Galaxies
... billion (109) years, which is nearly as old as the Universe itself. This estimate is based on Very Large Telescope measurements of the beryllium content of two stars in globular cluster NGC 6397. This allowed astronomers to deduce the elapsed time between the rise of the first generation of stars in ...
... billion (109) years, which is nearly as old as the Universe itself. This estimate is based on Very Large Telescope measurements of the beryllium content of two stars in globular cluster NGC 6397. This allowed astronomers to deduce the elapsed time between the rise of the first generation of stars in ...
Astronomy
... Which of the following can actually escape a black hole? A. Electrons. B. Very high energy gamma-rays. C. Visible light. D. Very low energy radio waves. E. None of the above. ...
... Which of the following can actually escape a black hole? A. Electrons. B. Very high energy gamma-rays. C. Visible light. D. Very low energy radio waves. E. None of the above. ...
H-RDiagramSE
... diagram and become giants or supergiants. Giants and supergiants form when the center of a star collapses and its outer parts expand outwards. What are the characteristics of giants and supergiants? _____________________________ ...
... diagram and become giants or supergiants. Giants and supergiants form when the center of a star collapses and its outer parts expand outwards. What are the characteristics of giants and supergiants? _____________________________ ...
Giant Molecular Clouds and Gravitational Stability
... Gas in the galaxy should be wildly gravitationally unstable. It should convert all its mass into stars on a free-fall time scale: ...
... Gas in the galaxy should be wildly gravitationally unstable. It should convert all its mass into stars on a free-fall time scale: ...
Hertzsprung-Russell Diagrams
... spectral type, and evolutionary stage. There are 3 very different types of stars: Most stars, including the sun, are "main sequence stars," fueled by nuclear fusion converting hydrogen into helium. For these stars, the hotter they are, the brighter. These stars are in the most stable part of their e ...
... spectral type, and evolutionary stage. There are 3 very different types of stars: Most stars, including the sun, are "main sequence stars," fueled by nuclear fusion converting hydrogen into helium. For these stars, the hotter they are, the brighter. These stars are in the most stable part of their e ...
Consulting the Planetary Expert: You
... associated with asterisms (distinctive star patterns such as the Big Dipper) or constellations (an officially registered grouping of stars such as Leo). Today the sky is divided up into 88 regions, each associated with a constellation (see constellation map) recognized by the International Astronomi ...
... associated with asterisms (distinctive star patterns such as the Big Dipper) or constellations (an officially registered grouping of stars such as Leo). Today the sky is divided up into 88 regions, each associated with a constellation (see constellation map) recognized by the International Astronomi ...
the rest of the univ..
... Spectra and photometric data have been obtained for 5145 Pholus. Its albedo is very low (less than 0.1). Its spectra indicates the presence of organic compounds, which are often very dark (e.g. the nucleus of Comet Halley). Some believe that Triton, Pluto and its moon Charon are merely the largest e ...
... Spectra and photometric data have been obtained for 5145 Pholus. Its albedo is very low (less than 0.1). Its spectra indicates the presence of organic compounds, which are often very dark (e.g. the nucleus of Comet Halley). Some believe that Triton, Pluto and its moon Charon are merely the largest e ...
H-R Diagrams
... 2 The y-axis - luminosity - doesn’t increase linearly: for equal intervals it increases by the same multiple. This is a logarithmic scale - useful for ...
... 2 The y-axis - luminosity - doesn’t increase linearly: for equal intervals it increases by the same multiple. This is a logarithmic scale - useful for ...
here - ESA Science
... Information from Hipparcos has enabled astronomers to trace the Sun’s passage through the Galaxy back in time. This has shown that over the last 500 million years the Sun has passed through four of the Milky Way’s spiral arms. The times that these traverses occurred appear to coincide with extended ...
... Information from Hipparcos has enabled astronomers to trace the Sun’s passage through the Galaxy back in time. This has shown that over the last 500 million years the Sun has passed through four of the Milky Way’s spiral arms. The times that these traverses occurred appear to coincide with extended ...
Determining the Sizes of Stars Using the HR Diagram
... Explain the HR Diagram. Point out that the temperature axis is reversed with hotter stars on the left and colder stars to the right. More luminous (intrinsically bright) stars lie at the top of the diagram and lower luminosity (intrinsically faint) stars lie at the bottom of the diagram. 5. Explain ...
... Explain the HR Diagram. Point out that the temperature axis is reversed with hotter stars on the left and colder stars to the right. More luminous (intrinsically bright) stars lie at the top of the diagram and lower luminosity (intrinsically faint) stars lie at the bottom of the diagram. 5. Explain ...
Final 2004
... the Sun is powered by the thermonu lear fusion of 3 4 He nu lei to 12 C in its ore d the speed of the Earth orbiting the Sun does not depend on the Sun's mass (18.) Whi h of the following pro esses is most likely to be seen in Nature? a p+p ...
... the Sun is powered by the thermonu lear fusion of 3 4 He nu lei to 12 C in its ore d the speed of the Earth orbiting the Sun does not depend on the Sun's mass (18.) Whi h of the following pro esses is most likely to be seen in Nature? a p+p ...
Solutions: Doppler Effect
... At that time, Star B is moving directly towards Earth d. How is star “B” moving relative to Earth when its lines are shifted the most to the red? At that time, Star B is moving directly away from Earth • Go to: http://www.howstuffworks.com/planet-hunting2.htm • Read the material and watch the animat ...
... At that time, Star B is moving directly towards Earth d. How is star “B” moving relative to Earth when its lines are shifted the most to the red? At that time, Star B is moving directly away from Earth • Go to: http://www.howstuffworks.com/planet-hunting2.htm • Read the material and watch the animat ...
WORD - UWL faculty websites
... At that time, Star B is moving directly towards Earth d. How is star “B” moving relative to Earth when its lines are shifted the most to the red? At that time, Star B is moving directly away from Earth Go to: http://www.howstuffworks.com/planet-hunting2.htm Read the material and watch the animat ...
... At that time, Star B is moving directly towards Earth d. How is star “B” moving relative to Earth when its lines are shifted the most to the red? At that time, Star B is moving directly away from Earth Go to: http://www.howstuffworks.com/planet-hunting2.htm Read the material and watch the animat ...
Powerpoint Review
... The size of the light source. The strength of the light source. Since not all stars are the same distance from your eye, size, or strength, every star will have a different brightness when you look up into the night sky. The brightness of a star as it appears from the earth, without the effect of th ...
... The size of the light source. The strength of the light source. Since not all stars are the same distance from your eye, size, or strength, every star will have a different brightness when you look up into the night sky. The brightness of a star as it appears from the earth, without the effect of th ...
Terrestrial Planet (and Life) Finder
... If we leave out fi and fc (i.e. assume they are unity—all life forms develop our kind of intelligence and technology and try to communicate), we are calculating the number of life-bearing planets in our Galaxy at any given time (like now). We know there has been life on our planet for 3 billion year ...
... If we leave out fi and fc (i.e. assume they are unity—all life forms develop our kind of intelligence and technology and try to communicate), we are calculating the number of life-bearing planets in our Galaxy at any given time (like now). We know there has been life on our planet for 3 billion year ...
Can`t tell –depends on how much hotter the small one is relative to
... Imagine you are comparing the abilities of electric hot plates of different sizes and temperatures to cook fully two identical large pots of spaghetti. Note that the pots are all as large as the largest hot plate. When a hot plate is at one of the temperature settings (low, med, high), the hot plate ...
... Imagine you are comparing the abilities of electric hot plates of different sizes and temperatures to cook fully two identical large pots of spaghetti. Note that the pots are all as large as the largest hot plate. When a hot plate is at one of the temperature settings (low, med, high), the hot plate ...
HABITABLE PLANETS For every star with planets, how many of
... with life, then they are the most common abodes for life in the universe, and we should be searching for signals from them. Also, they have very long main sequence lifetimes, so you could have civilizations as old as 1015 billion years on planets orbiting these stars. Conclusion: avg. number of habi ...
... with life, then they are the most common abodes for life in the universe, and we should be searching for signals from them. Also, they have very long main sequence lifetimes, so you could have civilizations as old as 1015 billion years on planets orbiting these stars. Conclusion: avg. number of habi ...
Welcome to Astro 10! - UC Berkeley Astronomy w
... 5 x 104 (in hydrogen, others similar) • Galaxy: ratio of distance to nearest star to Sun’s radius is 4.2 ly / 700,000 km = 5.7 x 107. Our Galaxy is much “emptier” than an atom. • Solar System: ratio of Earth’s distance from the Sun to Sun’s radius 1 AU / 700,000 km = 214, so an atom is much “emptier ...
... 5 x 104 (in hydrogen, others similar) • Galaxy: ratio of distance to nearest star to Sun’s radius is 4.2 ly / 700,000 km = 5.7 x 107. Our Galaxy is much “emptier” than an atom. • Solar System: ratio of Earth’s distance from the Sun to Sun’s radius 1 AU / 700,000 km = 214, so an atom is much “emptier ...
Worksheet
... form, the mass of the new nucleus is less than the combined mass of the two original nuclei. The difference in mass between the two is released as energy. In stars, this kind of reaction is referred to as stellar nucleosynthesis, but it is more commonly known as nuclear fusion. Nuclear fusion is use ...
... form, the mass of the new nucleus is less than the combined mass of the two original nuclei. The difference in mass between the two is released as energy. In stars, this kind of reaction is referred to as stellar nucleosynthesis, but it is more commonly known as nuclear fusion. Nuclear fusion is use ...
The Mighty Hunter in the Winter Sky By Shannon Jackson
... appear seasonally, and then disappear as they fall below the horizon. There are five constellations, however, which seem to circle Polaris (po LAR us), also known as the North Star. The North Star always stays put while the other stars and constellations are moving. Polaris is marking the North Pole ...
... appear seasonally, and then disappear as they fall below the horizon. There are five constellations, however, which seem to circle Polaris (po LAR us), also known as the North Star. The North Star always stays put while the other stars and constellations are moving. Polaris is marking the North Pole ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.