Hubblecast Episode 68: The Hubble time machine Visual notes 00
... 5. So how is it possible that Hubble can look into the past? Well, that’s because, just like a spacecraft, light also travels at a finite speed. At 300,000 kilometres per second, this speed is very high, but it is still finite. That means that, in principle, everything we see is a thing of the past. ...
... 5. So how is it possible that Hubble can look into the past? Well, that’s because, just like a spacecraft, light also travels at a finite speed. At 300,000 kilometres per second, this speed is very high, but it is still finite. That means that, in principle, everything we see is a thing of the past. ...
ALMA_BoJun605_Gruppioni
... High resolution CO imaging to determine morphology (mergers?), derive rotation curves → Mdyn, density, temperature, ... (1h per source) • Observe sources in HCN to trace dense regions of star-formation. (10h per source, 20 sources) • Total: 12h per source, 170h for sample of 50 sources. ...
... High resolution CO imaging to determine morphology (mergers?), derive rotation curves → Mdyn, density, temperature, ... (1h per source) • Observe sources in HCN to trace dense regions of star-formation. (10h per source, 20 sources) • Total: 12h per source, 170h for sample of 50 sources. ...
The Milky Way and other Galaxies
... Star forming regions get elongated due to differential rotation. ...
... Star forming regions get elongated due to differential rotation. ...
Uniqueness of the Earth, Lebo, 7-30
... Must be near, but not in, a spiral arm. We are at a corotation point far from our galactic center. Note: At the co-rotation point the Sun remains stationary and out of a spiral arm. Most all stars in the Milky Way are in the central bulge, a globular cluster or a spiral arm. In each of these locatio ...
... Must be near, but not in, a spiral arm. We are at a corotation point far from our galactic center. Note: At the co-rotation point the Sun remains stationary and out of a spiral arm. Most all stars in the Milky Way are in the central bulge, a globular cluster or a spiral arm. In each of these locatio ...
PH607lec08
... that cluster galaxies commonly interact. Over time, the galaxy interactions are likely to affect the content of the cluster itself. Researchers believe that the Hercules Cluster is significantly similar to young galaxy clusters in the distant, early Universe and that exploring galaxy types and their ...
... that cluster galaxies commonly interact. Over time, the galaxy interactions are likely to affect the content of the cluster itself. Researchers believe that the Hercules Cluster is significantly similar to young galaxy clusters in the distant, early Universe and that exploring galaxy types and their ...
runaway - Astronomy & Astrophysics Group
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
The Pulsar “Lighthouse”
... • Degenerate pressure of neutrons can support stars only up to 3M • For M > 3M: Further collapse Î black hole • Mass is so concentrated that light cannot escape. • One way to think about it: – vescape = 2GM/R becomes greater than speed of light. – So photons can’t escape. • Black holes now known o ...
... • Degenerate pressure of neutrons can support stars only up to 3M • For M > 3M: Further collapse Î black hole • Mass is so concentrated that light cannot escape. • One way to think about it: – vescape = 2GM/R becomes greater than speed of light. – So photons can’t escape. • Black holes now known o ...
The Milky Way galaxy
... What could this dark matter be? Relic particles from the Big Bang? Lots of 3 solar mass black holes? This is one of the biggest mysteries in modern astronomy. ...
... What could this dark matter be? Relic particles from the Big Bang? Lots of 3 solar mass black holes? This is one of the biggest mysteries in modern astronomy. ...
Two-Gyro Performance, Scheduling and Acquisitions
... Two-Gyro Mode scheduling rates are currently at 72 orbits per week (74 orbits per week excluding the 5 weeks of ACS hardware issues in 2006 when we scrambled to schedule ...
... Two-Gyro Mode scheduling rates are currently at 72 orbits per week (74 orbits per week excluding the 5 weeks of ACS hardware issues in 2006 when we scrambled to schedule ...
Galaxies - SD43 Teacher Sites
... 7. Not every star visible from Earth has a name. Why not? 8. Earth is located in one of the arms of the spiral galaxy, the Milky Way. How do you think the appearance of the night sky would differ if our location were much closer to the centre of the galaxy? 9. How does the speed at which a galaxy ro ...
... 7. Not every star visible from Earth has a name. Why not? 8. Earth is located in one of the arms of the spiral galaxy, the Milky Way. How do you think the appearance of the night sky would differ if our location were much closer to the centre of the galaxy? 9. How does the speed at which a galaxy ro ...
Slide 1
... Q4: Find galaxies with an isophotal surface brightness (SB) larger than 24 in the red band, with an ellipticity>0.5, and with the major axis of the ellipse between 30” and 60”arc seconds (a large galaxy). Q6: Find galaxies that are blended with a star and output the deblended galaxy magnitudes. Q7: ...
... Q4: Find galaxies with an isophotal surface brightness (SB) larger than 24 in the red band, with an ellipticity>0.5, and with the major axis of the ellipse between 30” and 60”arc seconds (a large galaxy). Q6: Find galaxies that are blended with a star and output the deblended galaxy magnitudes. Q7: ...
PHY 150
... galactic disk of M31 are probably Type I Cepheids and intrinsically brighter than the Type II Cepheids found in globular clusters of our Milky Way Galaxy by a factor of about 3. By assuming these stars were dimmer to start with, he would have concluded that they were closer than brighter stars furth ...
... galactic disk of M31 are probably Type I Cepheids and intrinsically brighter than the Type II Cepheids found in globular clusters of our Milky Way Galaxy by a factor of about 3. By assuming these stars were dimmer to start with, he would have concluded that they were closer than brighter stars furth ...
- ORIGINS Space Telescope
... spectrum. Its imagers and spectrographs will enable a variety of surveys of the sky that will discover and characterize the most distant galaxies, Milky-Way, exoplanets, and the outer reaches of our Solar system. Origins will enable flagship-quality general observing programs led by the astronomical ...
... spectrum. Its imagers and spectrographs will enable a variety of surveys of the sky that will discover and characterize the most distant galaxies, Milky-Way, exoplanets, and the outer reaches of our Solar system. Origins will enable flagship-quality general observing programs led by the astronomical ...
Chapter 27 Quasars, Active Galaxies, and Gamma
... Black holes in normal galaxies Rotation curves of stars near the centers of most galaxies show the presence of supermassive black holes with mass ranging from 106 to 109 solar ...
... Black holes in normal galaxies Rotation curves of stars near the centers of most galaxies show the presence of supermassive black holes with mass ranging from 106 to 109 solar ...
Training
... majestic spiral galaxy NGC 4414 was imaged by the Hubble Space Telescope as part of the HST Key Project on the Extragalactic Distance Scale. An international team of astronomers, led by Dr. Wendy Freedman of the Observatories of the Carnegie Institution of Washington, observed this galaxy on 13 diff ...
... majestic spiral galaxy NGC 4414 was imaged by the Hubble Space Telescope as part of the HST Key Project on the Extragalactic Distance Scale. An international team of astronomers, led by Dr. Wendy Freedman of the Observatories of the Carnegie Institution of Washington, observed this galaxy on 13 diff ...
Uniqueness of the Earth, Lebo, 7-30
... Must be near, but not in, a spiral arm. We are at a corotation point far from our galactic center. Note: At the co-rotation point the Sun remains stationary and out of a spiral arm. Most all stars in the Milky Way are in the central bulge, a globular cluster or a spiral arm. In each of these locatio ...
... Must be near, but not in, a spiral arm. We are at a corotation point far from our galactic center. Note: At the co-rotation point the Sun remains stationary and out of a spiral arm. Most all stars in the Milky Way are in the central bulge, a globular cluster or a spiral arm. In each of these locatio ...
14_creationism
... origin of life is a lot less likely than we think. This is testable. As we search the universe we may be unlikely to find even primitive life. The origin of intelligence. Perhaps primitive life may be common in the universe but intelligent life very rare. This is the position of Ward and Brownlee in ...
... origin of life is a lot less likely than we think. This is testable. As we search the universe we may be unlikely to find even primitive life. The origin of intelligence. Perhaps primitive life may be common in the universe but intelligent life very rare. This is the position of Ward and Brownlee in ...
final review sheet
... 1) Are you more likely to see a Type II supernova in a spiral galaxy or an elliptical galaxy? What about a Type Ia? 2) Where would you find open clusters in a spiral galaxy? Globular clusters? 3) How did pipe enthusiast and astronomer Edwin Hubble determine the distance to other galaxies? What relat ...
... 1) Are you more likely to see a Type II supernova in a spiral galaxy or an elliptical galaxy? What about a Type Ia? 2) Where would you find open clusters in a spiral galaxy? Globular clusters? 3) How did pipe enthusiast and astronomer Edwin Hubble determine the distance to other galaxies? What relat ...
solar system formation and gal
... • Over time it flattens into a disc-like shape while spinning in one direction • Astronomers theorize that any planets forming during this phase would form in the same flat plane and would rotate and revolve around the star in the same way • Using technology, astronomers have discovered flattening n ...
... • Over time it flattens into a disc-like shape while spinning in one direction • Astronomers theorize that any planets forming during this phase would form in the same flat plane and would rotate and revolve around the star in the same way • Using technology, astronomers have discovered flattening n ...
Robert_Minchin_Galaxies_2011_REU
... What else does HI give us? • The HI mass to luminosity ratio (MHI/L) tells us how gas-rich a galaxy is. – Gas-rich galaxies are often blue, late-type galaxies with active star formation. – Some are more intriguing objects with low SF rates. A number of these have been turned up by HI surveys. ...
... What else does HI give us? • The HI mass to luminosity ratio (MHI/L) tells us how gas-rich a galaxy is. – Gas-rich galaxies are often blue, late-type galaxies with active star formation. – Some are more intriguing objects with low SF rates. A number of these have been turned up by HI surveys. ...
Guide to Deep Space Poster PDF
... slightly shorter wavelength, moving through the colours to blue and violet the wavelengths get smaller and smaller. Light waves from moving sources are stretched or compressed by the motion. If an object is coming towards you its light is blueshifted meaning the light waves are squeezed together app ...
... slightly shorter wavelength, moving through the colours to blue and violet the wavelengths get smaller and smaller. Light waves from moving sources are stretched or compressed by the motion. If an object is coming towards you its light is blueshifted meaning the light waves are squeezed together app ...
PHYS 175 (2014) Final Examination Name: ___SOLUTION_____
... Massive objects warp spacetime. If a massive object is aligned between an observer and a light source, some rays of light from the source, which would not normally be directed toward the observer, can be deflected toward the observer. The effect may ma ...
... Massive objects warp spacetime. If a massive object is aligned between an observer and a light source, some rays of light from the source, which would not normally be directed toward the observer, can be deflected toward the observer. The effect may ma ...
About SDSS - Astro Projects
... The further away that we look, the fainter these galaxies appear to us, and the larger the telescopes, and the longer the exposure times needed to see them. Fortunately, modern telescopes no longer need to rely on the human eye looking through an eyepiece. Instead they use electronic detectors ('CCD ...
... The further away that we look, the fainter these galaxies appear to us, and the larger the telescopes, and the longer the exposure times needed to see them. Fortunately, modern telescopes no longer need to rely on the human eye looking through an eyepiece. Instead they use electronic detectors ('CCD ...
Galaxy Zoo
Galaxy Zoo is a crowdsourced astronomy project which invites people to assist in the morphological classification of large numbers of galaxies. (e.g.) It is an example of citizen science as it enlists the help of members of the public to help in scientific research. There have been seven versions up to July 2014, which are outlined in this article. Galaxy Zoo is part of the Zooniverse, a group of citizen science projects.