Media Alert A new spin on star-forming galaxies
... “We see that galaxy the way it probably looks now… something could have happened to it but it’s very unlikely,” he said. “The galaxies that are 10 billion light years away, that’s comparable to a picture from when you were three or four years old, that’s very different.” The team used the Keck and G ...
... “We see that galaxy the way it probably looks now… something could have happened to it but it’s very unlikely,” he said. “The galaxies that are 10 billion light years away, that’s comparable to a picture from when you were three or four years old, that’s very different.” The team used the Keck and G ...
Physics worksheets- P1 Topic 3 The Universe
... What is the cosmic microwave background radiation? ___________ ...
... What is the cosmic microwave background radiation? ___________ ...
ISP 205: Visions of the Universe
... in the local Solar neighborhood… • at typical relative speeds of more than 70,000 km/hr. • but stars are so far away that we cannot easily notice ...
... in the local Solar neighborhood… • at typical relative speeds of more than 70,000 km/hr. • but stars are so far away that we cannot easily notice ...
how can we measure things in space?
... ends of the Earth orbit (e.g. mid summer vs mid winter), we can measure the angle that the star in question has appeared to have moved, relative to the other stars. This is the same as when you focus on a point with one eye, then close it and open the other - you can use the apparent shift and the d ...
... ends of the Earth orbit (e.g. mid summer vs mid winter), we can measure the angle that the star in question has appeared to have moved, relative to the other stars. This is the same as when you focus on a point with one eye, then close it and open the other - you can use the apparent shift and the d ...
Astronomy 100 Name(s):
... the computer and, once the Windows desktop is displayed, click on “the Sky” icon along the bottom row or else the Start button → Programs → The Sky Astronomy Software. Once The Sky is open, go to Data → Site Information and click on the Location tab. Change the location to Seattle, Washington (you c ...
... the computer and, once the Windows desktop is displayed, click on “the Sky” icon along the bottom row or else the Start button → Programs → The Sky Astronomy Software. Once The Sky is open, go to Data → Site Information and click on the Location tab. Change the location to Seattle, Washington (you c ...
Integrated Science
... A neutron star is about 20 km in diameter and has the mass of about 1.4 times that of our Sun. This means that a neutron star is so dense that on Earth, one teaspoonful would weigh a billion tons! Because of its small size and high density, a neutron star possesses a surface gravitational field ab ...
... A neutron star is about 20 km in diameter and has the mass of about 1.4 times that of our Sun. This means that a neutron star is so dense that on Earth, one teaspoonful would weigh a billion tons! Because of its small size and high density, a neutron star possesses a surface gravitational field ab ...
Is There a Ring Around Milky Way?
... and SMC (Small Magellanic Cloud) has for its RMMR the value 2/3, i.e. it is assumed that the resonance among the members of the successive triad is stable as is the case with the first triad of Table 1. Then applying Eg. (3), we know the orbital period Tl of the HILMCO and hence its distance. The re ...
... and SMC (Small Magellanic Cloud) has for its RMMR the value 2/3, i.e. it is assumed that the resonance among the members of the successive triad is stable as is the case with the first triad of Table 1. Then applying Eg. (3), we know the orbital period Tl of the HILMCO and hence its distance. The re ...
Here
... Observing Other Stars • Recall there is basically no hope of spatially resolving the disk of any star (apart from the Sun). The stars are very far away, so their angular size as seen from Earth is extremely small. • The light we receive from a star comes from the entire hemisphere that is facing us ...
... Observing Other Stars • Recall there is basically no hope of spatially resolving the disk of any star (apart from the Sun). The stars are very far away, so their angular size as seen from Earth is extremely small. • The light we receive from a star comes from the entire hemisphere that is facing us ...
Reach for the Stars B
... 79. Parallax depends on measuring angles on the sky. How much smaller is the parallax angle for an object 400 light years away, as compared to one that is 100 light years away? 80. How many times brighter/dimmer would the Sun appear from a colony on Mars (which orbits at 1.5 AU) than it does from Ea ...
... 79. Parallax depends on measuring angles on the sky. How much smaller is the parallax angle for an object 400 light years away, as compared to one that is 100 light years away? 80. How many times brighter/dimmer would the Sun appear from a colony on Mars (which orbits at 1.5 AU) than it does from Ea ...
Narrated by Whoopi Goldberg - American Museum of Natural History
... A Digital Map of Modern Astrophyics A complex merger of cutting-edge astrophysics research from more than 40 leading scientists around the world and state-of-the-art supercomputing expertise made it possible for Journey to the Stars to transport audiences through time and space. The show’s productio ...
... A Digital Map of Modern Astrophyics A complex merger of cutting-edge astrophysics research from more than 40 leading scientists around the world and state-of-the-art supercomputing expertise made it possible for Journey to the Stars to transport audiences through time and space. The show’s productio ...
Measurement Systems Solutions
... physical quantity. People don’t typically refer to being alive for 662,691,456 seconds as a birthday milestone, but that is what happens when someone turns 21 years old. In other words, it is quite impractical to express one’s age in terms of the base unit of time (secodns). A much larger unit, the ...
... physical quantity. People don’t typically refer to being alive for 662,691,456 seconds as a birthday milestone, but that is what happens when someone turns 21 years old. In other words, it is quite impractical to express one’s age in terms of the base unit of time (secodns). A much larger unit, the ...
Cepheid Variable Star RS Puppis
... measure whether a star was nearby or far away. Distances could be determined within our solar system and out to some of the nearest stars, but astronomers did not have a reliable way to measure the distances to remote stars or nebulae. As far as they could tell, our Milky Way Galaxy was the entire u ...
... measure whether a star was nearby or far away. Distances could be determined within our solar system and out to some of the nearest stars, but astronomers did not have a reliable way to measure the distances to remote stars or nebulae. As far as they could tell, our Milky Way Galaxy was the entire u ...
Lecture 18
... A. They’re stuck to the interstellar medium. B. The gravity of disk stars pulls them toward the disk. C. Halo stars knock them back into the disk. ...
... A. They’re stuck to the interstellar medium. B. The gravity of disk stars pulls them toward the disk. C. Halo stars knock them back into the disk. ...
Motions of the Stars
... Most useful when measured for many stars. Use statistics of the motions to find: • Motion of the Sun through nearby space (towards the constellation of Hercules) • Local rotation of the Milky Way galaxy ...
... Most useful when measured for many stars. Use statistics of the motions to find: • Motion of the Sun through nearby space (towards the constellation of Hercules) • Local rotation of the Milky Way galaxy ...
Eccentricity
... The push pins must be the proper distance apart. Each push pin represents one focus. The distance between them is called the “distance between foci”. 2. Next, you must place your loop of string around both push pins. 3. Last, you must drag your pencil around the inside of the string. ...
... The push pins must be the proper distance apart. Each push pin represents one focus. The distance between them is called the “distance between foci”. 2. Next, you must place your loop of string around both push pins. 3. Last, you must drag your pencil around the inside of the string. ...
Active Galactic Nuclei
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
Red Supergiants as Cosmic Abundance Probes
... which makes it possible to test the current theories of galaxy evolution under the dark energy, cold dark matter framework. Such tests, however, require reliable and robust measurements of a galaxy’s chemical abundances. Historically this has been done using emission lines from extragalactic H II r ...
... which makes it possible to test the current theories of galaxy evolution under the dark energy, cold dark matter framework. Such tests, however, require reliable and robust measurements of a galaxy’s chemical abundances. Historically this has been done using emission lines from extragalactic H II r ...
Deep Space (PDF: 224k)
... surface. Most of this time elapses in the “radiative zone,” where light scatters back and forth, but over time makes its way toward the surface. Above the radiative zone is the convective zone, where energy transport becomes a bit faster. Just as Earth’s atmosphere on a summer day gets warmed by the ...
... surface. Most of this time elapses in the “radiative zone,” where light scatters back and forth, but over time makes its way toward the surface. Above the radiative zone is the convective zone, where energy transport becomes a bit faster. Just as Earth’s atmosphere on a summer day gets warmed by the ...
Star Formation
... Very massive stars have to be fantastically hot (to hold themselves up against gravity). This means that they will be abundantly filled with energetic radiation (light), which in turn provides a pressure that will actually disrupt the star. The so-called Eddington limit is about 150 times the mass o ...
... Very massive stars have to be fantastically hot (to hold themselves up against gravity). This means that they will be abundantly filled with energetic radiation (light), which in turn provides a pressure that will actually disrupt the star. The so-called Eddington limit is about 150 times the mass o ...
White dwarfs that crossed the Chandrasekhar limit
... of Sun, grow to be red giants and eventually shed their outer layer by forming a planetary nebula and form a white dwarf. Large and very large stars grow as super red giants, resulting in a supernova and end up as neutron star and black hole respectively. (Image credit: http://essayweb.net/astronomy ...
... of Sun, grow to be red giants and eventually shed their outer layer by forming a planetary nebula and form a white dwarf. Large and very large stars grow as super red giants, resulting in a supernova and end up as neutron star and black hole respectively. (Image credit: http://essayweb.net/astronomy ...
Document
... It bulges in the middle, 16 thousand light years thick, But out by us, it’s just 3000 light years wide. We’re 30,000 light years from galactic central point. We go ‘round every 200 million years, And our galaxy is only one of millions of billions In this amazing and expanding Universe ...
... It bulges in the middle, 16 thousand light years thick, But out by us, it’s just 3000 light years wide. We’re 30,000 light years from galactic central point. We go ‘round every 200 million years, And our galaxy is only one of millions of billions In this amazing and expanding Universe ...
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.