- newmanlib.ibri.org
... kiloparsecs), to galaxies in millions of light years (or megaparsecs), the distances to the most distant observable objects (galaxies and quasars) in billions of light years (or gigaparsecs). Thus the universe is at least billions of trillions (i.e., quintillions) of miles in radius. 2. The visible ...
... kiloparsecs), to galaxies in millions of light years (or megaparsecs), the distances to the most distant observable objects (galaxies and quasars) in billions of light years (or gigaparsecs). Thus the universe is at least billions of trillions (i.e., quintillions) of miles in radius. 2. The visible ...
Galaxy Evolution
... as a function of M500 (bottom axis) and velocity dispersion (top axis). X-ray gas mass fractions from Vikhlinin et al. (2006; circles) and Gastaldello et al. (2006; triangles) and the stellar mass fractions ( BCG +ICL+galaxies; squares) for systems in our sample with masses that overlap the range sh ...
... as a function of M500 (bottom axis) and velocity dispersion (top axis). X-ray gas mass fractions from Vikhlinin et al. (2006; circles) and Gastaldello et al. (2006; triangles) and the stellar mass fractions ( BCG +ICL+galaxies; squares) for systems in our sample with masses that overlap the range sh ...
Lesson Plan A2 The Year and Seasons
... the shaded portion of the globe is always opposite the lamp. This means the night side of the globe “looks out” in all the directions of a circle over the course of the year. Our nighttime view of the stars changes through the year. In summer we look out in one direction at certain constellations. S ...
... the shaded portion of the globe is always opposite the lamp. This means the night side of the globe “looks out” in all the directions of a circle over the course of the year. Our nighttime view of the stars changes through the year. In summer we look out in one direction at certain constellations. S ...
The Sun
... Through a solar telescope the edge of the sun looks sharp. But the sun really has no definite surface. What looks like the surface is in fact a layer of gas about 200 miles thick. From this layer comes most of the light we get. The layer is called the photosphere. (Photo means “light.”) The other la ...
... Through a solar telescope the edge of the sun looks sharp. But the sun really has no definite surface. What looks like the surface is in fact a layer of gas about 200 miles thick. From this layer comes most of the light we get. The layer is called the photosphere. (Photo means “light.”) The other la ...
The Ultimate Tool of Astronomy: Telescopes
... the rest frame) are observed to be at ultraviolet wavelengths. The same emission lines for Star B are observed to be at X-ray wavelengths. From these observations you conclude that: 1) both stars are moving away from the Earth 2) Star A is moving towards the Earth faster than Star B 3) Star B is mov ...
... the rest frame) are observed to be at ultraviolet wavelengths. The same emission lines for Star B are observed to be at X-ray wavelengths. From these observations you conclude that: 1) both stars are moving away from the Earth 2) Star A is moving towards the Earth faster than Star B 3) Star B is mov ...
Power-point slides for Lecture 2
... the star. E.g., CN processing, s-process, He, etc. 2) Structurally, the helium and heavy element core – once its mass has been determined is insensitive to the presence of the envelope. If the entire envelope is lost however, the star enters a phase of rapid Wolf-Rayet mass loss that does greatly af ...
... the star. E.g., CN processing, s-process, He, etc. 2) Structurally, the helium and heavy element core – once its mass has been determined is insensitive to the presence of the envelope. If the entire envelope is lost however, the star enters a phase of rapid Wolf-Rayet mass loss that does greatly af ...
Astronomical Distances
... In the picture above, the line of sight to the star in December is different than that in June, when the Earth is on the other side of its orbit. As seen from the Earth, the nearby star appears to sweep through the angle shown. Half of this angle, is the parallax, p. Parallax decreases with Distance ...
... In the picture above, the line of sight to the star in December is different than that in June, when the Earth is on the other side of its orbit. As seen from the Earth, the nearby star appears to sweep through the angle shown. Half of this angle, is the parallax, p. Parallax decreases with Distance ...
Brown et al. 2008 Studying Resolved Stellar
... Figure 6 shows a synthetic CMD of a 3 ×108 solar masses stellar population obtained with a constant SF over a 12 Gyr lifetime. The color encoding reflects the stellar ages. Superimposed are diagnostic boxes, designed to sample well defined age ranges. The number of stars counted within each box is p ...
... Figure 6 shows a synthetic CMD of a 3 ×108 solar masses stellar population obtained with a constant SF over a 12 Gyr lifetime. The color encoding reflects the stellar ages. Superimposed are diagnostic boxes, designed to sample well defined age ranges. The number of stars counted within each box is p ...
Dark Matter -24-------------------------------~-----------R-E-S-O-N-A-N-C
... particular spectral type, and all stars of this type have similar masses and give out similar amounts of light; in other words, the mass-to-light ratio of all sun-like stars is constant. A randomly chosen patch of the galaxy will have a large number of different types of stars, and its mass-to-light ...
... particular spectral type, and all stars of this type have similar masses and give out similar amounts of light; in other words, the mass-to-light ratio of all sun-like stars is constant. A randomly chosen patch of the galaxy will have a large number of different types of stars, and its mass-to-light ...
Imaging extrasolar planets
... are useful barometers and thermometers for the planets’ become unimportant. Thus, despite uncertainties in the formaatmospheric conditions. tion mechanism, we can be fairly certain that the planets Another fascinating aspect of the HR 8799 discovery is around HR 8799 are less than 13 times the mass ...
... are useful barometers and thermometers for the planets’ become unimportant. Thus, despite uncertainties in the formaatmospheric conditions. tion mechanism, we can be fairly certain that the planets Another fascinating aspect of the HR 8799 discovery is around HR 8799 are less than 13 times the mass ...
The Official Magazine of the University of St Andrews Astronomical Society
... extract revenge, Orion retired to the island of Delos where he became the companion of Artemis, goddess of the hunt. However, her twin brother, Apollo, became jealous of their relationship and one day he challenged Artemis to hit a small dot that was in the middle of the sea. Never one to pass up a ...
... extract revenge, Orion retired to the island of Delos where he became the companion of Artemis, goddess of the hunt. However, her twin brother, Apollo, became jealous of their relationship and one day he challenged Artemis to hit a small dot that was in the middle of the sea. Never one to pass up a ...
Still Lost in Space
... If they really were this close, they could not possibly be stars. As they appear as bright as stars but are 104 times closer, by the inverse square law, they would have to be 108 times fainter. No such stars exist in our universe Also any star that was so close (down to 1.5 AU) would be clearly ...
... If they really were this close, they could not possibly be stars. As they appear as bright as stars but are 104 times closer, by the inverse square law, they would have to be 108 times fainter. No such stars exist in our universe Also any star that was so close (down to 1.5 AU) would be clearly ...
α Cen A + iodine cell spectrum - Department of Physics and Astronomy
... The challenge of detecting Earth-mass planets Earth-mass planets require velocity precision of ~ 1 m/s. The table gives velocity amplitudes of α Cen A and B caused by 1 ME and 10 ME planets in orbits of different size, a. α Cen A a (AU) ...
... The challenge of detecting Earth-mass planets Earth-mass planets require velocity precision of ~ 1 m/s. The table gives velocity amplitudes of α Cen A and B caused by 1 ME and 10 ME planets in orbits of different size, a. α Cen A a (AU) ...
document
... – L measures star’s “intrinsic” brightness, rather than “apparent” brightness seen from Earth ...
... – L measures star’s “intrinsic” brightness, rather than “apparent” brightness seen from Earth ...
November News Letter - Boise Astronomical Society
... stars located in the middle of the rectangle of Orion’s body; this is Orion’s Belt. If you have a pair of binoculars handy, then scan downward from the middle star in Orion’s Belt. These stars represent his sword and the second star in the sword should look a little fuzzy. That fuzzy spot is located ...
... stars located in the middle of the rectangle of Orion’s body; this is Orion’s Belt. If you have a pair of binoculars handy, then scan downward from the middle star in Orion’s Belt. These stars represent his sword and the second star in the sword should look a little fuzzy. That fuzzy spot is located ...
Chapter 2 PowerPoint
... – Unbalanced forces cause rotation axis to wobble • Directly proportional to angular momentum • Circular motion of the axis projected into space ...
... – Unbalanced forces cause rotation axis to wobble • Directly proportional to angular momentum • Circular motion of the axis projected into space ...
Today`s Powerpoint
... of the Milky Way Galaxy? A: hydrogen gas B: stars C: dead stars (white dwarfs, neutron stars, and black ...
... of the Milky Way Galaxy? A: hydrogen gas B: stars C: dead stars (white dwarfs, neutron stars, and black ...
Gilmore
... Low luminosity, low surface-brightness satellite galaxies, ‘classical’ L ~ 106L, V >> 24 mag/sq Apparently dark-matter dominated ~ 10km/s, 10 < M/L < 100 Metal-poor, all contain very old stars; but ...
... Low luminosity, low surface-brightness satellite galaxies, ‘classical’ L ~ 106L, V >> 24 mag/sq Apparently dark-matter dominated ~ 10km/s, 10 < M/L < 100 Metal-poor, all contain very old stars; but ...
Exoplanet Discoveries and the Fermi Paradox
... continuously habitable zones may be zero width, because the location changes by more than its width as the star heats up. Even if there is a CHZ, it is so close to the star that planets would have tidally locked rotations. This situation is sketched in Figure 5, from Impey19. The tidal lock radius i ...
... continuously habitable zones may be zero width, because the location changes by more than its width as the star heats up. Even if there is a CHZ, it is so close to the star that planets would have tidally locked rotations. This situation is sketched in Figure 5, from Impey19. The tidal lock radius i ...
10 Stellar Evolution - Journigan-wiki
... Nothing made of matter can survive the trip across the black hole’s event horizon and through. In general relativity, it is a general term for a boundary in space-time, defined with respect to an observer, beyond which events cannot affect the observer. Light emitted beyond the horizon can never rea ...
... Nothing made of matter can survive the trip across the black hole’s event horizon and through. In general relativity, it is a general term for a boundary in space-time, defined with respect to an observer, beyond which events cannot affect the observer. Light emitted beyond the horizon can never rea ...
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.