Milky Way structure
... • What is the closest galaxy to the Milky Way? The new answer to this old question is the Canis Major dwarf galaxy. For many years astronomers thought the Large Magellan Cloud (LMC) was closest, but its title was supplanted in 1994 by the Sagittarius dwarf galaxy. Recent measurements ind ...
... • What is the closest galaxy to the Milky Way? The new answer to this old question is the Canis Major dwarf galaxy. For many years astronomers thought the Large Magellan Cloud (LMC) was closest, but its title was supplanted in 1994 by the Sagittarius dwarf galaxy. Recent measurements ind ...
Galaxies – Island universes
... Barred Spirals: Same, but additionally have a straight “bar” of stars centered on the center of the galaxy. Milky Way is a barred spiral ...
... Barred Spirals: Same, but additionally have a straight “bar” of stars centered on the center of the galaxy. Milky Way is a barred spiral ...
2010_02_04 LP08 Our Galactic Home
... Sir Walter Scott Breathes there the man with soul so dead Who never to himself hath said, This is my own, my native land! Whose heart hath ne'er within him burned, As home his footsteps he hath turned From wandering on a foreign strand! If such there breathe, go, mark him well; ...
... Sir Walter Scott Breathes there the man with soul so dead Who never to himself hath said, This is my own, my native land! Whose heart hath ne'er within him burned, As home his footsteps he hath turned From wandering on a foreign strand! If such there breathe, go, mark him well; ...
Summary: Nuclear burning in stars
... • Spiral arms have higher density than space between arms • Excess gravitational attraction slows down gas, stars when they pass through spiral arm in course of their orbits. • Î spiral arms are a traffic jam ...
... • Spiral arms have higher density than space between arms • Excess gravitational attraction slows down gas, stars when they pass through spiral arm in course of their orbits. • Î spiral arms are a traffic jam ...
The Danger of Deadly Cosmic Explosions
... • Major extinction. • Not much harm if further. • SN material in sediments. • 1 SN/100 years in our galaxy • Close 1 per 100million years. • Good news: our neighbor stars peaceful. • Bad news: when one does show signs of blowing, time to migrate. ...
... • Major extinction. • Not much harm if further. • SN material in sediments. • 1 SN/100 years in our galaxy • Close 1 per 100million years. • Good news: our neighbor stars peaceful. • Bad news: when one does show signs of blowing, time to migrate. ...
What is the difference between geocentric and heliocentric theories?
... Sun, not Earth, was the center of the solar system and the planets revolved around it. • This is the Helios means “sun” Heliocentric Theory. in Greek. ...
... Sun, not Earth, was the center of the solar system and the planets revolved around it. • This is the Helios means “sun” Heliocentric Theory. in Greek. ...
Galaxies
... the furthest observed galaxies has taken 11 billion years to reach us. These galaxies appear as they were when the universe was very young. ...
... the furthest observed galaxies has taken 11 billion years to reach us. These galaxies appear as they were when the universe was very young. ...
Beyond the Solar System By Patti Hutchison ANSWER THE
... The universe is made up of billions of galaxies. The galaxies cluster together in groups. If you could look at the whole universe at once, it would look like a spider web. Between the galaxies, space is almost completely empty. Tiny atoms are hundreds of miles apart. ...
... The universe is made up of billions of galaxies. The galaxies cluster together in groups. If you could look at the whole universe at once, it would look like a spider web. Between the galaxies, space is almost completely empty. Tiny atoms are hundreds of miles apart. ...
Stars, Galaxies, and the Universe
... • A white dwarf is is a star that has used up all of its hydrogen and is the leftover center of an older star. • Class F stars are yellow-white • The majority of stars in our galaxy are main sequence stars. ...
... • A white dwarf is is a star that has used up all of its hydrogen and is the leftover center of an older star. • Class F stars are yellow-white • The majority of stars in our galaxy are main sequence stars. ...
Elliptical Galaxies
... After these simple types of galaxies the diagram splits into two. On the upper branch are the S0 galaxies first - called lenticular galaxies because they are shaped like a lens in a magnfiying glass. The description is made up of the "S", meaning lenticular, the "0", meaning no arms, and the subscr ...
... After these simple types of galaxies the diagram splits into two. On the upper branch are the S0 galaxies first - called lenticular galaxies because they are shaped like a lens in a magnfiying glass. The description is made up of the "S", meaning lenticular, the "0", meaning no arms, and the subscr ...
Test #4
... 1. The location of the center of the Galaxy is determined by observations of: a) Cepheids variables, b) Globular clusters, c) The spiral arms, d) A visually bright, massive, object around which all objects in the Galaxy move. 2. What two observations of an object allow for a determination of the Mil ...
... 1. The location of the center of the Galaxy is determined by observations of: a) Cepheids variables, b) Globular clusters, c) The spiral arms, d) A visually bright, massive, object around which all objects in the Galaxy move. 2. What two observations of an object allow for a determination of the Mil ...
Lecture 7
... galaxies. Their red colors and featureless contours indicate that their stellar populations are old…these galaxies evidently formed their stars many billions of years ago early in the history of the Universe. Radio telescopes confirm that they are empty of gas and therefore have no fuel for making s ...
... galaxies. Their red colors and featureless contours indicate that their stellar populations are old…these galaxies evidently formed their stars many billions of years ago early in the history of the Universe. Radio telescopes confirm that they are empty of gas and therefore have no fuel for making s ...
Galaxies and the Universe
... Nearby? Maybe Solar Systems in Formation? 1920: Galaxies are Stars 1920’s: Galaxies are like the Milky Way Biggest single increase in our mental picture of the Universe in human history ...
... Nearby? Maybe Solar Systems in Formation? 1920: Galaxies are Stars 1920’s: Galaxies are like the Milky Way Biggest single increase in our mental picture of the Universe in human history ...
Linking Asteroids and Meteorites through Reflectance
... • We identify a star cluster that is close enough to determine its distance by parallax • We plots its H-R diagram • Since we know the distances to the cluster stars • We can determine their luminosities ...
... • We identify a star cluster that is close enough to determine its distance by parallax • We plots its H-R diagram • Since we know the distances to the cluster stars • We can determine their luminosities ...
1. a) Astronomers use the parallax method to measure
... use almost the same method anytime we measure the masses of astronomical objects. What quantities would an astronomer have to measure to determine the mass of a cluster of galaxies? (Your method should include all of the mass, not just the mass of the luminous matter.) We measure masses by seeing ho ...
... use almost the same method anytime we measure the masses of astronomical objects. What quantities would an astronomer have to measure to determine the mass of a cluster of galaxies? (Your method should include all of the mass, not just the mass of the luminous matter.) We measure masses by seeing ho ...
Galaxy clusters - University of Iowa Astrophysics
... • By measuring multiple images of one source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
... • By measuring multiple images of one source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
galaxy - 106Thursday130-430
... containing several millions to some trillion stars, of masses between several million and several trillion times that of our Sun, of an extension of a few thousands to several 100,000 light years, typically separated by millions of light years ...
... containing several millions to some trillion stars, of masses between several million and several trillion times that of our Sun, of an extension of a few thousands to several 100,000 light years, typically separated by millions of light years ...
Universe 8e Lecture Chapter 24 Galaxies
... ellipticals, and irregulars. The disks of spiral and barred spiral galaxies are sites of active star formation. Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited. Lenticular galaxies are intermediate between spiral and elliptical galaxies ...
... ellipticals, and irregulars. The disks of spiral and barred spiral galaxies are sites of active star formation. Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited. Lenticular galaxies are intermediate between spiral and elliptical galaxies ...
TF_final3 - Arecibo Observatory
... with Dr. T. Ghosh of the Arecibo Observatory, our mentor. They gave us papers, books, web references and some insights about the subject. we reviewed them and developed an understanding of the topic. We then took the following steps. (1) The Radio spectra for neutral hydrogen, and OH radicals were t ...
... with Dr. T. Ghosh of the Arecibo Observatory, our mentor. They gave us papers, books, web references and some insights about the subject. we reviewed them and developed an understanding of the topic. We then took the following steps. (1) The Radio spectra for neutral hydrogen, and OH radicals were t ...
Chapter 27 Stars and Galaxies
... After an explosion, the core of a supernova may contract into a very small but incredibly dense ball of neutrons, called a neutron star Some neutron stars emit two beams of radiation that looks like a lighthouse, these are called pulsars ...
... After an explosion, the core of a supernova may contract into a very small but incredibly dense ball of neutrons, called a neutron star Some neutron stars emit two beams of radiation that looks like a lighthouse, these are called pulsars ...
Galaxy clusters - University of Iowa Astrophysics
... • By measuring multiple images of one source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
... • By measuring multiple images of one source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
Slide 1
... Cluster, which has three supergiant ellipticals (M87 contains accretion disk indicating BH or WH in center--a quadrillion solar masses!) The Pisces-Cetus Complex: may include 400 rich (and lots of poor) clusters. Brent Tully. Is the Universe homogeneous? God's Bubble Bath: Galaxy superclusters seem ...
... Cluster, which has three supergiant ellipticals (M87 contains accretion disk indicating BH or WH in center--a quadrillion solar masses!) The Pisces-Cetus Complex: may include 400 rich (and lots of poor) clusters. Brent Tully. Is the Universe homogeneous? God's Bubble Bath: Galaxy superclusters seem ...
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.