Galaxies - cloudfront.net
... Galaxies are the biggest groups of stars in the universe. They can contain anywhere from a few million to many billions of stars. Galaxies are divided into three types according to shape: spiral, elliptical, and irregular galaxies. • Spiral galaxies spin and appear as a rotating disk of stars and du ...
... Galaxies are the biggest groups of stars in the universe. They can contain anywhere from a few million to many billions of stars. Galaxies are divided into three types according to shape: spiral, elliptical, and irregular galaxies. • Spiral galaxies spin and appear as a rotating disk of stars and du ...
The Milky Way Galaxy
... whether all stars and nebulae are part of the Milky Way Galaxy. The Shapley–Curtis debate was the first major public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. ...
... whether all stars and nebulae are part of the Milky Way Galaxy. The Shapley–Curtis debate was the first major public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. ...
M13 – The Great Hercules Cluster
... asterism but so far have not been able to identify it. If anyone out there can describe it better and tell me how to find it I would be grateful. Lastly, check out the nearby 11th magnitude spiral galaxy NGC 6207. It lies just 30’ to the northeast of M13 and can be seen along with M13 in the same wi ...
... asterism but so far have not been able to identify it. If anyone out there can describe it better and tell me how to find it I would be grateful. Lastly, check out the nearby 11th magnitude spiral galaxy NGC 6207. It lies just 30’ to the northeast of M13 and can be seen along with M13 in the same wi ...
memphis astronomical society short course in astronomy 2015
... If you would like to take the test, it is recommended that you prepare for it. It is not a particularly difficult test, but you are expected to know most of the important concepts in astronomy. You should not feel that the test is like a final exam in an astrophysics course, but if you pass it, you ...
... If you would like to take the test, it is recommended that you prepare for it. It is not a particularly difficult test, but you are expected to know most of the important concepts in astronomy. You should not feel that the test is like a final exam in an astrophysics course, but if you pass it, you ...
Stars, Galaxies, and the Universe Section 1 Section 1
... • Stars vary in size and mass. • Stars such as the sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less mas ...
... • Stars vary in size and mass. • Stars such as the sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less mas ...
telescope as time machine - Galaxy Evolution Explorer
... So how is looking at far away galaxies like looking back in time? At 300,000 kilometers per second (186,000 miles per second), nothing travels faster than light. Even at this speed, though, it still takes time for light to get from one place to another. If you are looking at your girlfriend just acr ...
... So how is looking at far away galaxies like looking back in time? At 300,000 kilometers per second (186,000 miles per second), nothing travels faster than light. Even at this speed, though, it still takes time for light to get from one place to another. If you are looking at your girlfriend just acr ...
Bruemmer-Dark Matter
... There are no purely observational facts about the heavenly bodies. Astronomical measurements are, without exception, measurements of phenomena occurring in a terrestrial observatory or station; it is by theory they are translated into knowledge of a universe outside. ...
... There are no purely observational facts about the heavenly bodies. Astronomical measurements are, without exception, measurements of phenomena occurring in a terrestrial observatory or station; it is by theory they are translated into knowledge of a universe outside. ...
Stellar Temperatures
... There is a great variety of stellar absorption lines; the strength of any individual line is determined by the star’s • Temperature (most important) • Gravity • Abundance Historically, stellar spectral types have been classified using letters; the temperature sequence is (hot-to-cool) O-B-A-F-G-K ...
... There is a great variety of stellar absorption lines; the strength of any individual line is determined by the star’s • Temperature (most important) • Gravity • Abundance Historically, stellar spectral types have been classified using letters; the temperature sequence is (hot-to-cool) O-B-A-F-G-K ...
Events: - Temecula Valley Astronomers
... reactions occur that release the Sun’s energy. Photons are being released in the Sun’s core. Is the Sun’s interior “dark?” No! There are a lot of photons there, the same photons we eventually see. The photons require millions of years to escape to the photosphere and thence into space. Now, it’s cer ...
... reactions occur that release the Sun’s energy. Photons are being released in the Sun’s core. Is the Sun’s interior “dark?” No! There are a lot of photons there, the same photons we eventually see. The photons require millions of years to escape to the photosphere and thence into space. Now, it’s cer ...
REGIONAL exam 2013
... 3. Only the answers provided on the answer page will be considered. Do not write outside the designated spaces for each answer. 4. Include school name and school code number at the bottom of the answer sheet. Indicate the names of the participants legibly at the bottom of the answer sheet. Be prepar ...
... 3. Only the answers provided on the answer page will be considered. Do not write outside the designated spaces for each answer. 4. Include school name and school code number at the bottom of the answer sheet. Indicate the names of the participants legibly at the bottom of the answer sheet. Be prepar ...
WIMPs versus MACHOS
... two-year period, after monitoring twenty million stars This significantly exceeds the single event expected from “known” stars in the Galaxy ...
... two-year period, after monitoring twenty million stars This significantly exceeds the single event expected from “known” stars in the Galaxy ...
Groups of Stars
... Macalester and Eagle Lake Observatory – see dates on calendar • Apr. 24, 25, 28 & May 1 ...
... Macalester and Eagle Lake Observatory – see dates on calendar • Apr. 24, 25, 28 & May 1 ...
Constituents of the Milky Way
... Measuring Ages of Individual Stars For individual stars that aren’t in clusters (like the Sun), we can’t use the cluster turnoff method to measure an age. For instance, a lone G star might be young, or it might be 10 billion years old. How do we measure its age? The universe contained only hydrogen ...
... Measuring Ages of Individual Stars For individual stars that aren’t in clusters (like the Sun), we can’t use the cluster turnoff method to measure an age. For instance, a lone G star might be young, or it might be 10 billion years old. How do we measure its age? The universe contained only hydrogen ...
ASTRONOMY 1 ... You may use this only this study guide for reference... No electronic devises: I pads, lap tops, phones, etc.
... 39. When the mass of a star's core becomes greater than 1.4 times the mass of the Sun, degenerate electrons can no longer keep it as a white dwarf. Instead, what does it become? 40. To predict whether a star will ultimately become a black hole, what is the key property of the star we should look at? ...
... 39. When the mass of a star's core becomes greater than 1.4 times the mass of the Sun, degenerate electrons can no longer keep it as a white dwarf. Instead, what does it become? 40. To predict whether a star will ultimately become a black hole, what is the key property of the star we should look at? ...
Big Bang, 429
... 39. When the mass of a star's core becomes greater than 1.4 times the mass of the Sun, degenerate electrons can no longer keep it as a white dwarf. Instead, what does it become? 40. To predict whether a star will ultimately become a black hole, what is the key property of the star we should look at? ...
... 39. When the mass of a star's core becomes greater than 1.4 times the mass of the Sun, degenerate electrons can no longer keep it as a white dwarf. Instead, what does it become? 40. To predict whether a star will ultimately become a black hole, what is the key property of the star we should look at? ...
Beatrice Muriel Hill Tinsley
... oxygen, iron, and other heavy elements out of the hydrogen and helium they began with. The stars that make most of the heavy elements have short lives, and so, before generation N+1 formed, the big stars of generation N could be assumed to have expelled their products in supernova explosions, while ...
... oxygen, iron, and other heavy elements out of the hydrogen and helium they began with. The stars that make most of the heavy elements have short lives, and so, before generation N+1 formed, the big stars of generation N could be assumed to have expelled their products in supernova explosions, while ...
notes
... mass of the sun- become black holes when they die. After this kind of star supernovas more than 5 times the mass of the sun may be left. The gravity of this mass is so strong that the gas is pulled inward, packing the gas into a smaller and smaller space. ...
... mass of the sun- become black holes when they die. After this kind of star supernovas more than 5 times the mass of the sun may be left. The gravity of this mass is so strong that the gas is pulled inward, packing the gas into a smaller and smaller space. ...
25Orbits - NMSU Astronomy
... sideways velocity! – Don’t need to keep running engines, just give it a sideways start and let the Earth do the rest of the pulling! – Do need to get above the Earth’s atmosphere so that friction isn’t a big effect ...
... sideways velocity! – Don’t need to keep running engines, just give it a sideways start and let the Earth do the rest of the pulling! – Do need to get above the Earth’s atmosphere so that friction isn’t a big effect ...
This document was created for people who do not have access to
... We begin at the Wilkinson Microwave Anisotropy Probe (WMAP) orbiting one million miles above the Earth, and travel outward through our solar system, into our local stellar neighborhood, and then around the disk of our Milky Way galaxy. As we leave the Milky Way, we find ourselves in a universe fille ...
... We begin at the Wilkinson Microwave Anisotropy Probe (WMAP) orbiting one million miles above the Earth, and travel outward through our solar system, into our local stellar neighborhood, and then around the disk of our Milky Way galaxy. As we leave the Milky Way, we find ourselves in a universe fille ...
The Milky Way
... into orbital plane • Vertical motions of stars give disk its 1,000 lyr thickness • Near the sun, stars have orbital period of ~200 Myrs ...
... into orbital plane • Vertical motions of stars give disk its 1,000 lyr thickness • Near the sun, stars have orbital period of ~200 Myrs ...
a MS Word version.
... 17. What is the Hubble redshift relation (give the mathematical relation and describe the parameters and constants)? The Hubble Diagram is a graphical depiction of the Hubble redshift relation, describe the Hubble Diagram (give the plotted parameters and their typical units, which axis they're on, w ...
... 17. What is the Hubble redshift relation (give the mathematical relation and describe the parameters and constants)? The Hubble Diagram is a graphical depiction of the Hubble redshift relation, describe the Hubble Diagram (give the plotted parameters and their typical units, which axis they're on, w ...
Word
... Galaxies are separated in distance units of megaparsecs (Mpc), where 1Mpc = 1 million parsec = 3.26 million ly. To determine distances of this magnitude, astronomers look for Cepheid variable stars in galaxies. After measuring the period and apparent magnitude of the Cepheid variables, they can dete ...
... Galaxies are separated in distance units of megaparsecs (Mpc), where 1Mpc = 1 million parsec = 3.26 million ly. To determine distances of this magnitude, astronomers look for Cepheid variable stars in galaxies. After measuring the period and apparent magnitude of the Cepheid variables, they can dete ...
Stars Part 1
... stars are cooler spectral types than the Sun (i.e., at the lower MS) All MS stars fuse H into He in their cores. ...
... stars are cooler spectral types than the Sun (i.e., at the lower MS) All MS stars fuse H into He in their cores. ...
Galaxies
... Galaxies are separated in distance units of megaparsecs (Mpc), where 1Mpc = 1 million parsec = 3.26 million ly. To determine distances of this magnitude, astronomers look for Cepheid variable stars in galaxies. After measuring the period and apparent magnitude of the Cepheid variables, they can dete ...
... Galaxies are separated in distance units of megaparsecs (Mpc), where 1Mpc = 1 million parsec = 3.26 million ly. To determine distances of this magnitude, astronomers look for Cepheid variable stars in galaxies. After measuring the period and apparent magnitude of the Cepheid variables, they can dete ...
Definitions - Sackville School
... A quantity that has (both) magnitude / size and direction Distance moved in a certain direction Speed at a particular time. This may be distance ÷ time or the gradient of a tangent on a speed – time graph. Rate of change of distance OR distance travelled ÷ time taken Rate of change of displacement O ...
... A quantity that has (both) magnitude / size and direction Distance moved in a certain direction Speed at a particular time. This may be distance ÷ time or the gradient of a tangent on a speed – time graph. Rate of change of distance OR distance travelled ÷ time taken Rate of change of displacement O ...
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.