Topic 3 notes - WordPress.com
... o this tells us that the Universe is expanding Note: The further away a galaxy is, the faster it is moving away from us Astronomers use this information and other data to work out theories that explain the past and present state of the Universe… Big Bang theory: First suggested in the 1930s, this s ...
... o this tells us that the Universe is expanding Note: The further away a galaxy is, the faster it is moving away from us Astronomers use this information and other data to work out theories that explain the past and present state of the Universe… Big Bang theory: First suggested in the 1930s, this s ...
Distance in Space and the Birth of Stars
... measurement of time. Light year represents the distance that light travels in one year. Light from the Sun takes approximately 8 minutes (or 480seconds) to get to Earth; and 1 AU (distance Sun is to Earth) is 149,597,871 km. Thus 149,597,871 km = 311,662.23 km/s 480s Lets round that and say that the ...
... measurement of time. Light year represents the distance that light travels in one year. Light from the Sun takes approximately 8 minutes (or 480seconds) to get to Earth; and 1 AU (distance Sun is to Earth) is 149,597,871 km. Thus 149,597,871 km = 311,662.23 km/s 480s Lets round that and say that the ...
Lecture 1: The Scale of the Cosmos - Ohio
... • If you do not have a TurningPoint clicker, please buy one from the Tech Depot on the ground floor of Baker Center. • Tech Depot staff will be available to toruble-shoot clickers (if necessary) and replace batteries for free. ...
... • If you do not have a TurningPoint clicker, please buy one from the Tech Depot on the ground floor of Baker Center. • Tech Depot staff will be available to toruble-shoot clickers (if necessary) and replace batteries for free. ...
18-3 constellations RG
... 13. When a star or galaxy moves quickly away from an observer, the light it emits appears redder than it usually would, this effect is called _____________________________________________. 14. When a star or galaxy moves quickly toward an observer, the light it emits appears bluer than it usually w ...
... 13. When a star or galaxy moves quickly away from an observer, the light it emits appears redder than it usually would, this effect is called _____________________________________________. 14. When a star or galaxy moves quickly toward an observer, the light it emits appears bluer than it usually w ...
Introduction to the Earth
... Black holes If the star was bigger than 30 times the mass of the sun The left over core becomes so dense that light can’t escape its gravity. Becomes a black hole. Grab any nearby matter and get bigger As matter falls in, it gives off x-rays. That’s how they find them ...
... Black holes If the star was bigger than 30 times the mass of the sun The left over core becomes so dense that light can’t escape its gravity. Becomes a black hole. Grab any nearby matter and get bigger As matter falls in, it gives off x-rays. That’s how they find them ...
Astronomy Honors Mid term Study Guide
... 23. What is the Hubble Law? 24. What are the Hubble Constant and its currently most accepted value ( in the commonly used units for this constant)? 25. Describe Olber’s Paradox and its resolution (explanation) 26. Describe evidence for the Universe being open, closed , or flat. 27. What is the cosmo ...
... 23. What is the Hubble Law? 24. What are the Hubble Constant and its currently most accepted value ( in the commonly used units for this constant)? 25. Describe Olber’s Paradox and its resolution (explanation) 26. Describe evidence for the Universe being open, closed , or flat. 27. What is the cosmo ...
Integrative Studies 410 Our Place in the Universe
... • Realizing (measuring) the distances to objects means realizing how big the universe is: – We realized that the solar system is not the ...
... • Realizing (measuring) the distances to objects means realizing how big the universe is: – We realized that the solar system is not the ...
100 $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $200
... of matter over antimatter. The amount of excess was very small, less than 1%. ...
... of matter over antimatter. The amount of excess was very small, less than 1%. ...
Dark Matter Dark Energy The History of the Universe More of the
... of matter over antimatter. The amount of excess was very small, less than 1%. ...
... of matter over antimatter. The amount of excess was very small, less than 1%. ...
final review sheet
... 3) If the distance between the Sun and the Earth increased by a factor of 2, the Sun’s luminosity would decrease by a factor of 4. 4) Pre-main sequence stars release energy by nuclear reactions which turn hydrogen into helium. 5) Astronomers can determine the age of clusters by looking at the distri ...
... 3) If the distance between the Sun and the Earth increased by a factor of 2, the Sun’s luminosity would decrease by a factor of 4. 4) Pre-main sequence stars release energy by nuclear reactions which turn hydrogen into helium. 5) Astronomers can determine the age of clusters by looking at the distri ...
Universe and Galaxy Short Study Guide
... instead grew on a diet of gas and stars controlled by their host galaxies in the beginning years of the universe. An initial look at 30 galaxies indicates that black holes do not precede a galaxy’s birth, but instead evolve with the galaxy by trapping an amazingly exact percentage (0.2) of the mass ...
... instead grew on a diet of gas and stars controlled by their host galaxies in the beginning years of the universe. An initial look at 30 galaxies indicates that black holes do not precede a galaxy’s birth, but instead evolve with the galaxy by trapping an amazingly exact percentage (0.2) of the mass ...
The “Big Bang” Theory
... • This was due to gravity • The galaxies, stars and planets formed from these clumps of dust and gas • There are billions of galaxies in the universe and each galaxy consists of billions of stars ...
... • This was due to gravity • The galaxies, stars and planets formed from these clumps of dust and gas • There are billions of galaxies in the universe and each galaxy consists of billions of stars ...
News Analysis - Learning Space
... It simplified large number of physical theories It is not rigid, it is flexible. It can be distorted and warped as large masses move through it. ...
... It simplified large number of physical theories It is not rigid, it is flexible. It can be distorted and warped as large masses move through it. ...
Final Exam Review (Word doc)
... 49. When compared to visual, spectroscopic, or eclipsing binaries, optical doubles are not true binaries because they are not gravitationally bound. 50. Because stars in clusters all have similar age and distance, the main underlying physical cause of their different appearances is their mass. 51. I ...
... 49. When compared to visual, spectroscopic, or eclipsing binaries, optical doubles are not true binaries because they are not gravitationally bound. 50. Because stars in clusters all have similar age and distance, the main underlying physical cause of their different appearances is their mass. 51. I ...
The Sky is Our Laboratory
... • It is a group of galaxies bound together by gravity. The Milky Way and the Andromeda Galaxy are the two largest and most massive galaxies in the Local Group. ...
... • It is a group of galaxies bound together by gravity. The Milky Way and the Andromeda Galaxy are the two largest and most massive galaxies in the Local Group. ...
Time From the Perspective of a Particle Physicist
... are remnants from the first few minutes after the Big Bang • To explore back to earlier times we use our understanding of physics • The earlier you go in time the hotter was the Universe. Particle accelerators can ...
... are remnants from the first few minutes after the Big Bang • To explore back to earlier times we use our understanding of physics • The earlier you go in time the hotter was the Universe. Particle accelerators can ...
Name ______KEY Date Core ______ Study Guide Galaxies and the
... happened 14 billion years ago when the universe suddenly began to expand from one merged mass of matter or substance. At that time, all matter was dense and hot and the universe developed in less than a second. 300,000 years later, the first elements formed, then stars, planets and galaxies the next ...
... happened 14 billion years ago when the universe suddenly began to expand from one merged mass of matter or substance. At that time, all matter was dense and hot and the universe developed in less than a second. 300,000 years later, the first elements formed, then stars, planets and galaxies the next ...
Document
... Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. ...
... Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. ...
PowerPoint Presentation - The Origin of the Universe
... became clear that the observed fluxes of SNe 1a at 0.3 < z < 0.8 were systematically lower than expected ...
... became clear that the observed fluxes of SNe 1a at 0.3 < z < 0.8 were systematically lower than expected ...
Quiz Maker - Geneva 304
... Review Questions: (Give answers in your own words) A Sense of the Universe 1. What was the universe like for ancient/medieval astronomers? 2. How did Astronomy relate to religious beliefs? 3. Why has the understandings and discoveries in the field of Astronomy increased so much over the last 30 year ...
... Review Questions: (Give answers in your own words) A Sense of the Universe 1. What was the universe like for ancient/medieval astronomers? 2. How did Astronomy relate to religious beliefs? 3. Why has the understandings and discoveries in the field of Astronomy increased so much over the last 30 year ...
Before people could understand the history of the universe, they had
... • Believed that the Sun, Moon, and planets circled the Earth • Planets sometimes appear to travel backward? -each moved in a small circle (epicycle) that was orbiting Earth • Summarized the theory in the Almagest -written in the 140 AD ...
... • Believed that the Sun, Moon, and planets circled the Earth • Planets sometimes appear to travel backward? -each moved in a small circle (epicycle) that was orbiting Earth • Summarized the theory in the Almagest -written in the 140 AD ...
Our Universe
... moving away from Earth, its electromagnetic spectrum stretches; the result is that wavelengths appear longer and shift toward the red end of the spectrum. ...
... moving away from Earth, its electromagnetic spectrum stretches; the result is that wavelengths appear longer and shift toward the red end of the spectrum. ...
Observable universe
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.