The Mass of the Galaxy - University of California, Berkeley
... Sources of Radio Emission – 21 cm radiation Neutral hydrogen has a very weak radio spectral transition. So the Galaxy is transparent to it. On the other hand, there’s a lot of neutral hydrogen. So we can see it everywhere. There are also molecular lines from CO and ...
... Sources of Radio Emission – 21 cm radiation Neutral hydrogen has a very weak radio spectral transition. So the Galaxy is transparent to it. On the other hand, there’s a lot of neutral hydrogen. So we can see it everywhere. There are also molecular lines from CO and ...
May
... known as the Hockey Stick Galaxy, the key features are the angled tilt of the disk and the apparent offset of the core. If observing at low magnification look in the same field of view for NGC4631, a more distant galaxy also seen edge-on. M64 is a type Sb spiral galaxy in the constellation Coma Bere ...
... known as the Hockey Stick Galaxy, the key features are the angled tilt of the disk and the apparent offset of the core. If observing at low magnification look in the same field of view for NGC4631, a more distant galaxy also seen edge-on. M64 is a type Sb spiral galaxy in the constellation Coma Bere ...
AST 207 Test 1 28 September 2011
... 51 Peg. The maximum speed is 60km/s, whereas the maximum for 51 Peg is 60m/s. In both cases, the visible star and something much fainter orbit each other. Assume the orbits are circles. a. (2 pt.) Find the ratio of the radii of the orbits of these two stars, ...
... 51 Peg. The maximum speed is 60km/s, whereas the maximum for 51 Peg is 60m/s. In both cases, the visible star and something much fainter orbit each other. Assume the orbits are circles. a. (2 pt.) Find the ratio of the radii of the orbits of these two stars, ...
September Evening Skies
... Vega, Capella, Altair, Antares, Fomalhaut, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled on the map. The double star (Dbl) at the bend of the handle of the Big Dipper is easily detected. Much more difficult is the double star near Vega in Lyra. ...
... Vega, Capella, Altair, Antares, Fomalhaut, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled on the map. The double star (Dbl) at the bend of the handle of the Big Dipper is easily detected. Much more difficult is the double star near Vega in Lyra. ...
Multiple choice test questions 2, Winter Semester
... B) The more massive the black hole, the larger the Schwarzschild radius. C) Even an object as small as you could become a black hole if there were some way to compress you to a size smaller than your Schwarzschild radius. D) For black holes produced in massive star supernovae, Schwarzschild radii ar ...
... B) The more massive the black hole, the larger the Schwarzschild radius. C) Even an object as small as you could become a black hole if there were some way to compress you to a size smaller than your Schwarzschild radius. D) For black holes produced in massive star supernovae, Schwarzschild radii ar ...
So, What All Is Out There, Anyway
... The earth is one of several planets that orbit the sun, and the moon orbits around the earth. Stars are like the sun, some being smaller and some larger, but so far away that they look like points of light. 11D – Scale Almost anything has limits on how big or small it can be. Benchmarks (Grades 6 th ...
... The earth is one of several planets that orbit the sun, and the moon orbits around the earth. Stars are like the sun, some being smaller and some larger, but so far away that they look like points of light. 11D – Scale Almost anything has limits on how big or small it can be. Benchmarks (Grades 6 th ...
5-E Galaxy T - McDonald Observatory
... Scale Distance from Milky Way – how many Milky Way diameters between the Milky Way and the (Andromeda Galaxy, Large Magellanic Cloud, Small Magellanic Cloud). Do you think galaxies collide? Why or why not? Galaxies, compared to their size, are closer together than stars. They are also much more mass ...
... Scale Distance from Milky Way – how many Milky Way diameters between the Milky Way and the (Andromeda Galaxy, Large Magellanic Cloud, Small Magellanic Cloud). Do you think galaxies collide? Why or why not? Galaxies, compared to their size, are closer together than stars. They are also much more mass ...
Understanding Large Numbers 1/15
... we will complete this project that directs you to creatively design a representation of a large number. Your goal is to make your number as real as possible. It is important to have some sense of large numbers as they are used in all fields of science. ...
... we will complete this project that directs you to creatively design a representation of a large number. Your goal is to make your number as real as possible. It is important to have some sense of large numbers as they are used in all fields of science. ...
Chapter 11. Stellar Brightness, Magnitudes, the Distance
... Other regions where we find stars on the H-R diagram (although not that many) are among the supergiants, which are the more massive examples of stellar evolution, and among the so-called “white dwarfs”. Note that a white dwarf is not a class V star. These are much less luminous than the class V (dwa ...
... Other regions where we find stars on the H-R diagram (although not that many) are among the supergiants, which are the more massive examples of stellar evolution, and among the so-called “white dwarfs”. Note that a white dwarf is not a class V star. These are much less luminous than the class V (dwa ...
The Life Cycle of Stars Webquest
... 1. Learn how to identify stars by their magnitude, color, temperature, and spectral class. 2. Investigate the process of nuclear fusion explained by Einstein's famous equation E = mc2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes st ...
... 1. Learn how to identify stars by their magnitude, color, temperature, and spectral class. 2. Investigate the process of nuclear fusion explained by Einstein's famous equation E = mc2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes st ...
ABOUT PARALLAX AND… CONSTELLATIONS Abstract
... EAAE Summer School Working Group (1France, 2Italy) ...
... EAAE Summer School Working Group (1France, 2Italy) ...
The Universe - Cloudfront.net
... Elliptical Galaxies – do not have spiral arms, makes up ~60% of known galaxies, can range from round to oval Irregular Galaxies – consist mostly of younger stars, appear as clouds of stars In addition to shape and size, one of the major differences among different galaxies is the age of their stars ...
... Elliptical Galaxies – do not have spiral arms, makes up ~60% of known galaxies, can range from round to oval Irregular Galaxies – consist mostly of younger stars, appear as clouds of stars In addition to shape and size, one of the major differences among different galaxies is the age of their stars ...
The Sun . . .
... The Sun is at the mid-life point of its predicted 10 billion year life. It started as a nebula and is now at the main sequence stage where fusion will continue until the hydrogen is used up. The Sun will then enter the Red Giant phase where it expands and grows cooler and more ...
... The Sun is at the mid-life point of its predicted 10 billion year life. It started as a nebula and is now at the main sequence stage where fusion will continue until the hydrogen is used up. The Sun will then enter the Red Giant phase where it expands and grows cooler and more ...
ASTR100 Class 01 - University of Maryland Department of
... C. The temperature starts low and ends high in both the raisin cake and the universe. D. The raisins stay roughly the same size as the cake expands, just as galaxies stay roughly the same size as the universe expands. E. The average distance increases with time both between raisins in the cake and b ...
... C. The temperature starts low and ends high in both the raisin cake and the universe. D. The raisins stay roughly the same size as the cake expands, just as galaxies stay roughly the same size as the universe expands. E. The average distance increases with time both between raisins in the cake and b ...
CHAP
... A. APPARENT BRIGHTNESS - Stars that are _________ to Earth appear brighter to us and stars ____________ from Earth seem dimmer. B. ABSOLUTE BRIGHTNESS ...
... A. APPARENT BRIGHTNESS - Stars that are _________ to Earth appear brighter to us and stars ____________ from Earth seem dimmer. B. ABSOLUTE BRIGHTNESS ...
... Studies of ice core show that concentrations of CO2 have not been so high for nearly half a million years. At the current rate of increase, they will have reached 800 ppm by the end of the 21st century! Beyond 550 ppm it would not be liveable! CO2 being emitted stays in the atmosphere for up to 200 ...
Distant Stars Lesson Plan
... Enter “Ch Cygni” into the search box in the upper right and click go. Select the Ch Cyg item out of the returned list. Review the highlights about the star: What a symbiotic star system is How fast the system’s jet streams are moving. Point out that there is a wealth of additional information no ...
... Enter “Ch Cygni” into the search box in the upper right and click go. Select the Ch Cyg item out of the returned list. Review the highlights about the star: What a symbiotic star system is How fast the system’s jet streams are moving. Point out that there is a wealth of additional information no ...
Chapter 34: Cosmology FYI 1. Radar Ranging 2. Triangulation idea
... P4: Consider light observed on earth that was emitted by atoms moving with stars or galaxies. Which statements are true? a. You can actually see little red atoms that have been shifted to the left. They have small beady red eyes and cannot be trusted. b. The spectral colors emitted by the atoms movi ...
... P4: Consider light observed on earth that was emitted by atoms moving with stars or galaxies. Which statements are true? a. You can actually see little red atoms that have been shifted to the left. They have small beady red eyes and cannot be trusted. b. The spectral colors emitted by the atoms movi ...
Power Point of Slides I never Got to
... How to see this without too much math? Concept is “center of mass”, and the more massive the nucleus, the closer the center of mass will be to it. This means for the same separation, since both orbit the center of mass, the electron will go faster for the heavier nucleus case since the nucleus trave ...
... How to see this without too much math? Concept is “center of mass”, and the more massive the nucleus, the closer the center of mass will be to it. This means for the same separation, since both orbit the center of mass, the electron will go faster for the heavier nucleus case since the nucleus trave ...
Scaling the Universe
... Match the following objects with the correct letter in front of its name. A. B. C. D. E. F. ...
... Match the following objects with the correct letter in front of its name. A. B. C. D. E. F. ...
B/W
... Sun and interstellar medium Typically: Hydrogen 90% by number; Helium 10%; other elements (metals) ¿ 1 % (by mass: X ' 0.70, Y ' 0.28, Z ' 0.02) • Globular cluster stars: Metal deficient compared to Sun by factors of 10 – 1000, Hydrogen and helium normal Assuming uniform initial composition for the ...
... Sun and interstellar medium Typically: Hydrogen 90% by number; Helium 10%; other elements (metals) ¿ 1 % (by mass: X ' 0.70, Y ' 0.28, Z ' 0.02) • Globular cluster stars: Metal deficient compared to Sun by factors of 10 – 1000, Hydrogen and helium normal Assuming uniform initial composition for the ...
1. How old is our sun now? How does its present luminosity
... when the Solar System first formed? How much longer will it remain on the main sequence? What will happen to the sun after it leaves the main sequence? (a) Our sun is now 4.6 Byrs old. (b) When it first formed its luminosity was about 70% of its present luminosity. (c) It takes a star like the sun a ...
... when the Solar System first formed? How much longer will it remain on the main sequence? What will happen to the sun after it leaves the main sequence? (a) Our sun is now 4.6 Byrs old. (b) When it first formed its luminosity was about 70% of its present luminosity. (c) It takes a star like the sun a ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.