Lecture-25 Notes - Georgia Southern University Astrophysics
... - chains of clusters (“walls”) are visible forming superclusters. 3) Large relatively empty regions (“voids”) also exist. - not really empty - Szomoru et al. 1994 found that void galaxies are no different (apparently) from filament galaxies. ...
... - chains of clusters (“walls”) are visible forming superclusters. 3) Large relatively empty regions (“voids”) also exist. - not really empty - Szomoru et al. 1994 found that void galaxies are no different (apparently) from filament galaxies. ...
The Search for the Earliest Galaxies
... are thought to have first formed, however, continues to be a priority for modern cosmology. Astronomers are still looking to identify the steps that led from the formation of the first stars to the immense collections of stars seen in magnificent galaxies like our Milky Way. In their early views wit ...
... are thought to have first formed, however, continues to be a priority for modern cosmology. Astronomers are still looking to identify the steps that led from the formation of the first stars to the immense collections of stars seen in magnificent galaxies like our Milky Way. In their early views wit ...
public_lector_10
... Lindblad interpreted the pattern of stellar motions as due to Galactic rotation ...
... Lindblad interpreted the pattern of stellar motions as due to Galactic rotation ...
The Milky Way - The Independent School
... Our Milky Way Galaxy is only one of the many billions of galaxies visible in the sky. This chapter will expand your horizon to discuss the different kinds of galaxies and their complex histories. Here you can expect answers to five essential questions: • What do galaxies look like? • How do astronom ...
... Our Milky Way Galaxy is only one of the many billions of galaxies visible in the sky. This chapter will expand your horizon to discuss the different kinds of galaxies and their complex histories. Here you can expect answers to five essential questions: • What do galaxies look like? • How do astronom ...
Lesson Plans - Houston ISD
... Ⓡ _SCI.8.8A Describe components of the universe including stars, nebulae and galaxies, and use models such as the Herztsprung-Russell diagram for classification. Ⓢ _SCI.8.8B Recognize that the Sun is a medium-sized star near the edge of a disc-shaped galaxy of stars and that the Sun is many thousand ...
... Ⓡ _SCI.8.8A Describe components of the universe including stars, nebulae and galaxies, and use models such as the Herztsprung-Russell diagram for classification. Ⓢ _SCI.8.8B Recognize that the Sun is a medium-sized star near the edge of a disc-shaped galaxy of stars and that the Sun is many thousand ...
How Big Is Our Universe? - Harvard
... The Sun is so far away that it would take the Space Shuttle seven months to fly there. That’s why the Sun, which is one hundred times the diameter of the Earth, looks so small! Three hundred years ago, astronomer Edmund Halley found a way to measure the distance to the Sun and to the planet Venus. K ...
... The Sun is so far away that it would take the Space Shuttle seven months to fly there. That’s why the Sun, which is one hundred times the diameter of the Earth, looks so small! Three hundred years ago, astronomer Edmund Halley found a way to measure the distance to the Sun and to the planet Venus. K ...
Our Galaxy -- The Milky Way PowerPoint
... – Gravitational bending of light has been observed • Tentatively, MACHOs account for < 40% of dark matter ...
... – Gravitational bending of light has been observed • Tentatively, MACHOs account for < 40% of dark matter ...
Cosmology with GMRT
... matter density profile in big galaxies. Baryons are easily lost from the shallow dark matter potential wells of small galaxies Reheating during the epoch of reionization, as well as from feedback from star formation should lead to dwarf galaxies having baryon fractions smaller than the cosmic ...
... matter density profile in big galaxies. Baryons are easily lost from the shallow dark matter potential wells of small galaxies Reheating during the epoch of reionization, as well as from feedback from star formation should lead to dwarf galaxies having baryon fractions smaller than the cosmic ...
Comments
... spectroscopy with the FORS instruments of the VLT and imaging with the Advanced Camera for Surveys onboard the HST. Our data set comprises 113 late-type galaxies in the redshift range 0.1
... spectroscopy with the FORS instruments of the VLT and imaging with the Advanced Camera for Surveys onboard the HST. Our data set comprises 113 late-type galaxies in the redshift range 0.1
12/08/14-- Student ID ______ TA Name
... 31. What observations provide evidence that our theories about Type Ia supernovae are correct? a. observations of supernovae occurring in galaxies having independently derived distances b. Hubble’s observation of the expanding universe back in the early 1900’s c. supermassive black holes at centers ...
... 31. What observations provide evidence that our theories about Type Ia supernovae are correct? a. observations of supernovae occurring in galaxies having independently derived distances b. Hubble’s observation of the expanding universe back in the early 1900’s c. supermassive black holes at centers ...
Bang To Sol - Transcript
... The center of our galaxy is a raging dynamo of tremendous power. And it’s natural to wonder what could provide such awesome energies? (Black Holes…) (spoken with an echo) ...
... The center of our galaxy is a raging dynamo of tremendous power. And it’s natural to wonder what could provide such awesome energies? (Black Holes…) (spoken with an echo) ...
March 2010 - Pomona Valley Amateur Astronomers
... What's Up? Aliens From A Nearby Galaxy? In science fiction stories, aliens often proclaim that they "come from a nearby galaxy." For astronomers this seems to be a joke, the close Sagittarius Dwarf Galaxy (NGC 6822) is a million light years away. That's a long was for any alien to travel. This teles ...
... What's Up? Aliens From A Nearby Galaxy? In science fiction stories, aliens often proclaim that they "come from a nearby galaxy." For astronomers this seems to be a joke, the close Sagittarius Dwarf Galaxy (NGC 6822) is a million light years away. That's a long was for any alien to travel. This teles ...
a description of planets and stars you may see
... The Moon, our natural satellite, always shows us the same face. Its cycle of phases have been an important influence on world cultures. The Moon's gravity produces the ocean tides. The Moon appears almost the same size in the sky as the Sun, allowing it to cover the Sun in total solar eclipses. The ...
... The Moon, our natural satellite, always shows us the same face. Its cycle of phases have been an important influence on world cultures. The Moon's gravity produces the ocean tides. The Moon appears almost the same size in the sky as the Sun, allowing it to cover the Sun in total solar eclipses. The ...
Ch17_Galaxies
... • Beyond the Milky Way are billions of other galaxies • Some galaxies are spiral like the Milky Way while others are egg-shaped or completely irregular in appearance • Besides shape, galaxies vary greatly in the star, gas, and dust content and some are more “active” than others • Galaxies tend to cl ...
... • Beyond the Milky Way are billions of other galaxies • Some galaxies are spiral like the Milky Way while others are egg-shaped or completely irregular in appearance • Besides shape, galaxies vary greatly in the star, gas, and dust content and some are more “active” than others • Galaxies tend to cl ...
The extragalactic universe and distance measurements
... – Extended Messier’s list of nebula – Tried to determine distribution of stars in Milky Way – described Milky Way as “detached nebula”, with Sun near center. – Thought that the nebulae could be similar systems – Turns out that his conclusions were heavily effected by dust in the Milky Way – Milky Wa ...
... – Extended Messier’s list of nebula – Tried to determine distribution of stars in Milky Way – described Milky Way as “detached nebula”, with Sun near center. – Thought that the nebulae could be similar systems – Turns out that his conclusions were heavily effected by dust in the Milky Way – Milky Wa ...
Small galaxies are growing smaller
... and globular clusters. This was clearly a previously untenanted area of parameter space, making these a whole new species of small stellar system, which we christened ultra-compact dwarfs (UCDs; Phillipps et al. 2001, Drinkwater et al. 2003). Their origin may be debated, of course. They could be mer ...
... and globular clusters. This was clearly a previously untenanted area of parameter space, making these a whole new species of small stellar system, which we christened ultra-compact dwarfs (UCDs; Phillipps et al. 2001, Drinkwater et al. 2003). Their origin may be debated, of course. They could be mer ...
Friday, January 27, 2017 First exam a week from today. Review
... Some suggested an alien structure. Bunk (no heat signal), but still not well explained with serious science. ...
... Some suggested an alien structure. Bunk (no heat signal), but still not well explained with serious science. ...
PDF
... differentiates ellipticals from unbarred and barred spirals, further classified according to the tightness and fine structure of their spiral arms which appears to correlate with the fraction of light present in the central bulge. Intermediate to the spirals and ellipticals, Hubble also introduced t ...
... differentiates ellipticals from unbarred and barred spirals, further classified according to the tightness and fine structure of their spiral arms which appears to correlate with the fraction of light present in the central bulge. Intermediate to the spirals and ellipticals, Hubble also introduced t ...
Constellation
... stellar blast is slamming into regions along the ring's inner regions, heating them up, and causing them to glow. The ring, about a light-year across, was probably shed by the star about 20,000 years before it exploded. Astronomers detected the first bright spot in 1997, but now they see dozens of s ...
... stellar blast is slamming into regions along the ring's inner regions, heating them up, and causing them to glow. The ring, about a light-year across, was probably shed by the star about 20,000 years before it exploded. Astronomers detected the first bright spot in 1997, but now they see dozens of s ...
Lecture 16
... galaxies) by pulling in gas from the cosmic web and through cannibalizing smaller galaxies. – Collisions and mergers can play a major role in galaxy growth and can induce starbursts. It is still being argued how important they are in spiral galaxy formation. – Mergers can transform spiral galaxies ...
... galaxies) by pulling in gas from the cosmic web and through cannibalizing smaller galaxies. – Collisions and mergers can play a major role in galaxy growth and can induce starbursts. It is still being argued how important they are in spiral galaxy formation. – Mergers can transform spiral galaxies ...
the young astronomers newsletter
... Galaxy J1649+2635 is a spiral galaxy like the Milky Way but with prominent “jets” of subatomic particles propelled outward from its core at nearly the speed of light. This is the first time that a galaxy was first identified as a spiral and then found to have large radio jets. The problem is that sp ...
... Galaxy J1649+2635 is a spiral galaxy like the Milky Way but with prominent “jets” of subatomic particles propelled outward from its core at nearly the speed of light. This is the first time that a galaxy was first identified as a spiral and then found to have large radio jets. The problem is that sp ...
Integrative Studies 410 Our Place in the Universe
... • Conclusion: there are no stars beyond a certain distance ...
... • Conclusion: there are no stars beyond a certain distance ...
The Milky Way Galaxy
... 8.3kpc to the Galactic center. Hence at optical wavelengths we cannot see through the disc to the bulge. This obscuration by dust strongly influenced the growth in our understanding of the Milky Way. In the first decades of the 20th century, before astronomers knew of interstellar dust, it was thoug ...
... 8.3kpc to the Galactic center. Hence at optical wavelengths we cannot see through the disc to the bulge. This obscuration by dust strongly influenced the growth in our understanding of the Milky Way. In the first decades of the 20th century, before astronomers knew of interstellar dust, it was thoug ...
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.