![Review Questions for Chp 2](http://s1.studyres.com/store/data/010460246_1-b51bad168407b58664f606562e92dd78-300x300.png)
Review Questions for Chp 2
... 55. What is the instrument called that uses the angle between the star and the horizon to detect location? 56. Why can radio telescopes be so large? 57. What is the main problem with the atmosphere and ground based telescopes? 58. Who came up with the idea that planets move in an elliptical orbit? 5 ...
... 55. What is the instrument called that uses the angle between the star and the horizon to detect location? 56. Why can radio telescopes be so large? 57. What is the main problem with the atmosphere and ground based telescopes? 58. Who came up with the idea that planets move in an elliptical orbit? 5 ...
2010_02_04 LP08 Our Galactic Home
... Up to 100 pc (parsecs) = 326 ly (light years) Up to 1000 pc (nearby in our galaxy) Up to 10,000 pc (104 pc) (into our galaxy) Up to 105 pc (100,000 pc) (through our galaxy) Up to 107 pc (far out into our galaxy and into other galaxies) ...
... Up to 100 pc (parsecs) = 326 ly (light years) Up to 1000 pc (nearby in our galaxy) Up to 10,000 pc (104 pc) (into our galaxy) Up to 105 pc (100,000 pc) (through our galaxy) Up to 107 pc (far out into our galaxy and into other galaxies) ...
Slide 1
... The Local Group: a galaxy 'poor' cluster of 27 galaxies: three large spirals, 12 dwarf ellipticals, 4 ellipticals, and 8 Irr. Dust in the plane of the Milky Way may obscure more. The Local (Virgo) Supercluster: Pancake-shaped. Composed of the Virgo Cluster (a 'rich' cluster) and about 100 other clus ...
... The Local Group: a galaxy 'poor' cluster of 27 galaxies: three large spirals, 12 dwarf ellipticals, 4 ellipticals, and 8 Irr. Dust in the plane of the Milky Way may obscure more. The Local (Virgo) Supercluster: Pancake-shaped. Composed of the Virgo Cluster (a 'rich' cluster) and about 100 other clus ...
Practice Questions for Final
... C. During the first 0.001 second after the Big Bang, particles and antiparticles were made in almost but not perfectly equal numbers. Everything annihilated except the very slight excess of matter particles. D. GUT theories predict that under the conditions that prevailed in the early universe, the ...
... C. During the first 0.001 second after the Big Bang, particles and antiparticles were made in almost but not perfectly equal numbers. Everything annihilated except the very slight excess of matter particles. D. GUT theories predict that under the conditions that prevailed in the early universe, the ...
Cosmology questions (Introduction)
... The Drake equation is used to estimate how many advanced civilizations might evolve in a Galaxy of similar size as the Milky Way. The answers vary, but suggest about 40 million civilizations at any one time is possible. Assuming the planets upon which each civilization lives are evenly spread throug ...
... The Drake equation is used to estimate how many advanced civilizations might evolve in a Galaxy of similar size as the Milky Way. The answers vary, but suggest about 40 million civilizations at any one time is possible. Assuming the planets upon which each civilization lives are evenly spread throug ...
Topic 3 Earth in the Universe
... • Occurred about 15 billion years ago • All matter and space was created ...
... • Occurred about 15 billion years ago • All matter and space was created ...
Integrative Studies 410 Our Place in the Universe
... – The year is the rotation period of the Earth around the Sun – The year is subdivided into months, the period of the Moon around the Earth – The weeks seven days are named after the seven bodies in the solar system known in ...
... – The year is the rotation period of the Earth around the Sun – The year is subdivided into months, the period of the Moon around the Earth – The weeks seven days are named after the seven bodies in the solar system known in ...
Name________________ Astronomy I cans 1. What is the Big Bang
... 10. How does our galaxy compare to other galaxies? 11. How does our galaxy move? ...
... 10. How does our galaxy compare to other galaxies? 11. How does our galaxy move? ...
WINNING STORY - Atlantis Short Story Contest
... I was slowly floating, completely at ease, when I realized I had just gone past the two most conspicuous of the stars that make up the Orion constellation. I was taken aback by how large, mighty and bright they were. From people’s viewpoint on Earth, it looks like these celestial bodies are located ...
... I was slowly floating, completely at ease, when I realized I had just gone past the two most conspicuous of the stars that make up the Orion constellation. I was taken aback by how large, mighty and bright they were. From people’s viewpoint on Earth, it looks like these celestial bodies are located ...
Stars and Galaxies
... collection of stars, gas, and dust Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar Elliptical galaxies—large, three-dimensional ellipses; most ...
... collection of stars, gas, and dust Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar Elliptical galaxies—large, three-dimensional ellipses; most ...
Core Theme 3: The Solar System
... realize that our present theories must be continually tested and modified because new theories frequently arise as we learn more through our observations. That is why most physicists and astronomers today are so inclined to accept the Big Bang Theory as the most plausible explanation for the origin ...
... realize that our present theories must be continually tested and modified because new theories frequently arise as we learn more through our observations. That is why most physicists and astronomers today are so inclined to accept the Big Bang Theory as the most plausible explanation for the origin ...
Notes - SFA Physics and Astronomy
... Near a black hole space-time is severely distorted and time itself is affected. As measured by an outside observer, time stops on the event horizon. Because the original object is no longer accessible from our universe, we cannot know very much about a black hole. In fact, theoretically only three t ...
... Near a black hole space-time is severely distorted and time itself is affected. As measured by an outside observer, time stops on the event horizon. Because the original object is no longer accessible from our universe, we cannot know very much about a black hole. In fact, theoretically only three t ...
The human race has made great strides in the last few centuries
... If the star is below about 5 to 8 solar masses, it will blow off the bulk of its outer layers, relieving the pressure in the core. This electron degenerate core of carbon then cools into a White Dwarf star. A White Dwarf is about the size of the Earth but has a mass that is usually about 70% the ma ...
... If the star is below about 5 to 8 solar masses, it will blow off the bulk of its outer layers, relieving the pressure in the core. This electron degenerate core of carbon then cools into a White Dwarf star. A White Dwarf is about the size of the Earth but has a mass that is usually about 70% the ma ...
Astronomy Practice Test
... 5. Our nearest star neighbor in space, Alpha Centauri, is four light years from Earth. Why will it be difficult to visit? A. It is very bright and hot. B. We are not sure exactly where it is. C. There may be no planets near it. D. It is very far away. 6. What are galaxies made of? A. moons and plane ...
... 5. Our nearest star neighbor in space, Alpha Centauri, is four light years from Earth. Why will it be difficult to visit? A. It is very bright and hot. B. We are not sure exactly where it is. C. There may be no planets near it. D. It is very far away. 6. What are galaxies made of? A. moons and plane ...
TCE Syllabus Summary Blank
... identify data sources, and gather, process and analyse information to assess one of the models of the Universe developed from the time of Aristotle to the time of Newton to identify limitations placed on the development of the model by the technology available at the time ...
... identify data sources, and gather, process and analyse information to assess one of the models of the Universe developed from the time of Aristotle to the time of Newton to identify limitations placed on the development of the model by the technology available at the time ...
Dark Matter and Dark Energy
... • Most of the mass-energy, about 95%, in the universe is ‘dark’. By dark we mean that it does not emit any form of electromagnetic radiation. • Dark energy and dark matter have not been directly observed but they have been inferred from observations of a wide variety of phenomena. There existence is ...
... • Most of the mass-energy, about 95%, in the universe is ‘dark’. By dark we mean that it does not emit any form of electromagnetic radiation. • Dark energy and dark matter have not been directly observed but they have been inferred from observations of a wide variety of phenomena. There existence is ...
Stars and The Universe
... did/will observers here in the SF Bay Area see of each eclipse? Whey did we see (or not see) the eclipses? How long did the eclipses last? What do you noticed about the interval between the solar and lunar eclipses during the two eclipse seasons this year (April and October)? That is, consider the e ...
... did/will observers here in the SF Bay Area see of each eclipse? Whey did we see (or not see) the eclipses? How long did the eclipses last? What do you noticed about the interval between the solar and lunar eclipses during the two eclipse seasons this year (April and October)? That is, consider the e ...
Slayt 1
... Expansion of the Universe – All galaxies are moving away from us – More distant galaxies moving away faster ...
... Expansion of the Universe – All galaxies are moving away from us – More distant galaxies moving away faster ...
DSST® ASTRONOMY EXAM INFORMATION
... either used as a reference to create the exam, or were used as textbooks in college courses of the same or similar title at the time the test was developed. You may reference either the current edition of these titles or textbooks currently used at a local college or university for the same class ti ...
... either used as a reference to create the exam, or were used as textbooks in college courses of the same or similar title at the time the test was developed. You may reference either the current edition of these titles or textbooks currently used at a local college or university for the same class ti ...
Great Observatories Origins Deep Survey (GOODS) Observation
... – Final project:………………….………... 40% – Homework:…………………..………… 20% – Term Papers or Research Projects:…….. 40% ...
... – Final project:………………….………... 40% – Homework:…………………..………… 20% – Term Papers or Research Projects:…….. 40% ...
Stars and Galaxies - Earth Science: Astronomy
... A. Galaxy—gravity holds together a large collection of stars, gas, and dust 1. Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group 2. Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar ...
... A. Galaxy—gravity holds together a large collection of stars, gas, and dust 1. Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group 2. Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar ...
Wh t i C l ? What is Cosmology?
... therefore, in infinite universe, night sky should be infinitely bright (or at least as bright as typical stellar surface – stars themselves block light from behind them) ...
... therefore, in infinite universe, night sky should be infinitely bright (or at least as bright as typical stellar surface – stars themselves block light from behind them) ...
The Sun, Stars, and Beyond
... • Galactic clusters are arranged in huge filaments called superclusters that stretch across vast regions of space, containing millions of galaxies. ...
... • Galactic clusters are arranged in huge filaments called superclusters that stretch across vast regions of space, containing millions of galaxies. ...
Position in Solar System ppt
... collapsed million own years gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained within and dense it began enough to move for the inmore aforming first giant and larger as it collected more and of The st ...
... collapsed million own years gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained within and dense it began enough to move for the inmore aforming first giant and larger as it collected more and of The st ...
Observable universe
![](https://commons.wikimedia.org/wiki/Special:FilePath/Observable_Universe_with_Measurements_01.png?width=300)
The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects has had time to reach the Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth.The word observable used in this sense does not depend on whether modern technology actually permits detection of radiation from an object in this region (or indeed on whether there is any radiation to detect). It simply indicates that it is possible in principle for light or other signals from the object to reach an observer on Earth. In practice, we can see light only from as far back as the time of photon decoupling in the recombination epoch. That is when particles were first able to emit photons that were not quickly re-absorbed by other particles. Before then, the Universe was filled with a plasma that was opaque to photons.The surface of last scattering is the collection of points in space at the exact distance that photons from the time of photon decoupling just reach us today. These are the photons we detect today as cosmic microwave background radiation (CMBR). However, with future technology, it may be possible to observe the still older relic neutrino background, or even more distant events via gravitational waves (which also should move at the speed of light). Sometimes astrophysicists distinguish between the visible universe, which includes only signals emitted since recombination—and the observable universe, which includes signals since the beginning of the cosmological expansion (the Big Bang in traditional cosmology, the end of the inflationary epoch in modern cosmology). According to calculations, the comoving distance (current proper distance) to particles from the CMBR, which represent the radius of the visible universe, is about 14.0 billion parsecs (about 45.7 billion light years), while the comoving distance to the edge of the observable universe is about 14.3 billion parsecs (about 46.6 billion light years), about 2% larger.The best estimate of the age of the universe as of 2015 is 7010137990000000000♠13.799±0.021 billion years but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away (as defined in terms of cosmological proper distance, which is equal to the comoving distance at the present time) than a static 13.8 billion light-years distance. It is estimated that the diameter of the observable universe is about 28 gigaparsecs (91 billion light-years, 8.8×1026 metres or 5.5×1023 miles), putting the edge of the observable universe at about 46–47 billion light-years away.