Presentation available here - Lunar and Planetary Institute
... One of the greatest challenges to astrophysics now is to understand the nature of the Dark Energy that drives the acceleration. The dark energy is probably a field (like a magnetic field, but different), but it is 120 orders of magnitude smaller than physicists would expect. No current theory of phy ...
... One of the greatest challenges to astrophysics now is to understand the nature of the Dark Energy that drives the acceleration. The dark energy is probably a field (like a magnetic field, but different), but it is 120 orders of magnitude smaller than physicists would expect. No current theory of phy ...
Earth apart.
... Marc Kamionkowski of the California Institute of Technology explains, "Whether the energy density dilutes or not depends on the equation of state of the dark energy:' To further understand this concept, compare a box filled with hot gas to a region of the expanding universe that you observe. (This a ...
... Marc Kamionkowski of the California Institute of Technology explains, "Whether the energy density dilutes or not depends on the equation of state of the dark energy:' To further understand this concept, compare a box filled with hot gas to a region of the expanding universe that you observe. (This a ...
Will Dark Energy Tear the Universe Apart?
... Marc Kamionkowski of the California Institute of Technology explains, "Whether the energy density dilutes or not depends on the equation of state of the dark energy:' To further understand this concept, compare a box filled with hot gas to a region of the expanding universe that you observe. (This a ...
... Marc Kamionkowski of the California Institute of Technology explains, "Whether the energy density dilutes or not depends on the equation of state of the dark energy:' To further understand this concept, compare a box filled with hot gas to a region of the expanding universe that you observe. (This a ...
Great Discoveries in Astronomy and Astrophysics 171.112
... How did we come to know what we know about the Universe? This course will focus on key discoveries in astronomy and astrophysics from the speed of light to the speed of the expanding and now accelerating Universe, from the discovery of Neptune to the modern detection of extrasolar planets, spanning ...
... How did we come to know what we know about the Universe? This course will focus on key discoveries in astronomy and astrophysics from the speed of light to the speed of the expanding and now accelerating Universe, from the discovery of Neptune to the modern detection of extrasolar planets, spanning ...
Chapter 27 Quasars, Active Galaxies, and Gamma
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
Chapter 15, Galaxies
... – The arrows in the top row of images point to the supernovae. The bottom row shows the host galaxies before or after the stars exploded. The supernovae exploded between 3.5 and 10 billion years ago. ...
... – The arrows in the top row of images point to the supernovae. The bottom row shows the host galaxies before or after the stars exploded. The supernovae exploded between 3.5 and 10 billion years ago. ...
NIE10x301Sponsor Thank You (Page 1)
... M31 to be a smooth, flat oval of light that appears to be eight times wider than the Full Moon (which appears to be ? degree wide)! In fact, the Andromeda Galaxy was first noted by the ancient Persian astronomer Al Sufi in 905 A.D., well before the telescope was invented. M31 is the nearest large ga ...
... M31 to be a smooth, flat oval of light that appears to be eight times wider than the Full Moon (which appears to be ? degree wide)! In fact, the Andromeda Galaxy was first noted by the ancient Persian astronomer Al Sufi in 905 A.D., well before the telescope was invented. M31 is the nearest large ga ...
Chapter 21: Energy and Matter in the Universe
... Energy going into the gravitational force would have taken energy away from the photons, presumably distributing this energy among gravitons, the carrier particles for the gravitational force. The less energetic photons would have had a lower average temperature, and the cooling process of the Unive ...
... Energy going into the gravitational force would have taken energy away from the photons, presumably distributing this energy among gravitons, the carrier particles for the gravitational force. The less energetic photons would have had a lower average temperature, and the cooling process of the Unive ...
stars & galaxies
... • The nucleus is 2000 light years thick. • Our sun is located 30,000 light years from the nucleus. • It takes the sun 200 million years to ...
... • The nucleus is 2000 light years thick. • Our sun is located 30,000 light years from the nucleus. • It takes the sun 200 million years to ...
Beyond the Solar System By Patti Hutchison ANSWER THE
... the galaxies in the universe are spiral galaxies. A spiral galaxy looks like a twirling octopus. In the "arms" of the galaxy, new stars are formed. Some of them are very large. They cause the surrounding clouds of dust to glow brightly, also. Spiral galaxies are beautiful to see. New stars are not f ...
... the galaxies in the universe are spiral galaxies. A spiral galaxy looks like a twirling octopus. In the "arms" of the galaxy, new stars are formed. Some of them are very large. They cause the surrounding clouds of dust to glow brightly, also. Spiral galaxies are beautiful to see. New stars are not f ...
Galaxies - senwiki
... that nothing, not even light, can escape. -Why? Black holes have extremely strong gravitational pulls. They can pull in stars and accumulate the mass of the stars. -Where are black holes located? Astronomers believe that each galaxy contains at least one supermassive black hole at its centre. ...
... that nothing, not even light, can escape. -Why? Black holes have extremely strong gravitational pulls. They can pull in stars and accumulate the mass of the stars. -Where are black holes located? Astronomers believe that each galaxy contains at least one supermassive black hole at its centre. ...
How Old is the Universe?
... 271, 957) apply this technique to globular clusters and find that the age of the Universe is greater than 12.07 Gyr with 95% confidence. They say the age is proportional to one over the luminosity of the RR Lyra stars which are used to determine the distances to globular clusters. Chaboyer (1997) gi ...
... 271, 957) apply this technique to globular clusters and find that the age of the Universe is greater than 12.07 Gyr with 95% confidence. They say the age is proportional to one over the luminosity of the RR Lyra stars which are used to determine the distances to globular clusters. Chaboyer (1997) gi ...
The Teleological Argument - University of Colorado Boulder
... were made in their arrangement, the watch would no longer function. We conclude from this that the watch must have had a designer. On the other hand, the stone does is not this way and does not require a designer. Paley notes that you would conclude that the watch had a designer, EVEN IF: • you had ...
... were made in their arrangement, the watch would no longer function. We conclude from this that the watch must have had a designer. On the other hand, the stone does is not this way and does not require a designer. Paley notes that you would conclude that the watch had a designer, EVEN IF: • you had ...
Model answer
... the retina is closed to the eye lens and this causes long sight 2- It passes through the lens without refraction 4-c1- The distance covered by the body = 44 x 1.5 = 66 m 2- The displacement = the diameter of the circle = 14 m 3- The average speed = total distance = 66 = 6.6 m/sec ...
... the retina is closed to the eye lens and this causes long sight 2- It passes through the lens without refraction 4-c1- The distance covered by the body = 44 x 1.5 = 66 m 2- The displacement = the diameter of the circle = 14 m 3- The average speed = total distance = 66 = 6.6 m/sec ...
Goal: To understand how we know distances to
... • This compares the rotation of the galaxy to the brightness (the rotation gives an indication of mass which therefore would affect brightness). • The rotation is found using the Doppler shifts of the 21 cm line of Hydrogen. • You can also use bright objects such as very massive stars, novae, and so ...
... • This compares the rotation of the galaxy to the brightness (the rotation gives an indication of mass which therefore would affect brightness). • The rotation is found using the Doppler shifts of the 21 cm line of Hydrogen. • You can also use bright objects such as very massive stars, novae, and so ...
Goal: To understand how we know distances to various
... • This compares the rotation of the galaxy to the brightness (the rotation gives an indication of mass which therefore would affect brightness). • The rotation is found using the Doppler shifts of the 21 cm line of Hydrogen. • You can also use bright objects such as very massive stars, novae, and so ...
... • This compares the rotation of the galaxy to the brightness (the rotation gives an indication of mass which therefore would affect brightness). • The rotation is found using the Doppler shifts of the 21 cm line of Hydrogen. • You can also use bright objects such as very massive stars, novae, and so ...
Universe 8e Lecture Chapter 24 Galaxies
... The Hubble Law: There is a simple linear relationship between the distance from the Earth to a remote galaxy and the redshift of that galaxy (which is a measure of the speed with which it is receding from us). This relationship is the Hubble law, v = H0d. The value of the Hubble constant, H0, is not ...
... The Hubble Law: There is a simple linear relationship between the distance from the Earth to a remote galaxy and the redshift of that galaxy (which is a measure of the speed with which it is receding from us). This relationship is the Hubble law, v = H0d. The value of the Hubble constant, H0, is not ...
WHAT IS A LIGHT
... as we look out into the universe we also look back in time • If a star is 1 million light years away, it has taken 1 million years for the light to reach us, and the light we are seeing was created 1 million years ago • So we are seeing the star as it looked 1 million years ago, not how it looks tod ...
... as we look out into the universe we also look back in time • If a star is 1 million light years away, it has taken 1 million years for the light to reach us, and the light we are seeing was created 1 million years ago • So we are seeing the star as it looked 1 million years ago, not how it looks tod ...
Quasars - Ann Arbor Earth Science
... superluminal sources - radio sources which show internal motions (for example, increasing separation between the core and a knot in the jet) which appears faster than the speed of light in our frame of reference. The data are consistent with this being a transformation effect from seeing jets movin ...
... superluminal sources - radio sources which show internal motions (for example, increasing separation between the core and a knot in the jet) which appears faster than the speed of light in our frame of reference. The data are consistent with this being a transformation effect from seeing jets movin ...
Selected Physical and Astronomical Constants Conversion Factors
... upper and lower limits on the mass of a star, a white dwarf, a neutron star, a black hole? Which of these bodies require general relativity for its correct description? In what sense are space and time unified? Why do things fall in my everyday life on Earth? Does the term relativity mean that every ...
... upper and lower limits on the mass of a star, a white dwarf, a neutron star, a black hole? Which of these bodies require general relativity for its correct description? In what sense are space and time unified? Why do things fall in my everyday life on Earth? Does the term relativity mean that every ...
FantasticTrip - Cooper Church of Christ
... of the ends of the earth, And the wicked be shaken out of it? 14 It takes on form like clay under a seal, And stands out like a garment. 15 From the wicked their light is withheld, And the upraised arm is broken. 16 "Have you entered the springs of the sea? Or have you walked in search of the depths ...
... of the ends of the earth, And the wicked be shaken out of it? 14 It takes on form like clay under a seal, And stands out like a garment. 15 From the wicked their light is withheld, And the upraised arm is broken. 16 "Have you entered the springs of the sea? Or have you walked in search of the depths ...
Inquiry Lab: Exploring the Spectrum Intended Learning Outcomes: 1
... instrumentation, because of the very high speed with which light moves. Therefore, while light is the wave of interest to astronomers, this activity will focus primarily on simulations to demonstrate the Doppler Effect and red shift. Once students understand these principles, they will interpret som ...
... instrumentation, because of the very high speed with which light moves. Therefore, while light is the wave of interest to astronomers, this activity will focus primarily on simulations to demonstrate the Doppler Effect and red shift. Once students understand these principles, they will interpret som ...
Matter is everything around you.
... One of the best known theories in cosmology is the Big Bang. This is the idea that our universe started out much hotter and denser than it is now and has been expanding since then. This theory is based on observations of our universe, among which are: External galaxies are receding in such a way tha ...
... One of the best known theories in cosmology is the Big Bang. This is the idea that our universe started out much hotter and denser than it is now and has been expanding since then. This theory is based on observations of our universe, among which are: External galaxies are receding in such a way tha ...
THE 3-D UNIVERSE CONCEPTS
... just by how bright it appears from Earth. For instance, a close, faint star can appear just as bright in the sky as a brighter star that is farther away. The difference between a star’s actual brightness and its apparent brightness when seen from Earth indicates how far away it is. To judge a star’s ...
... just by how bright it appears from Earth. For instance, a close, faint star can appear just as bright in the sky as a brighter star that is farther away. The difference between a star’s actual brightness and its apparent brightness when seen from Earth indicates how far away it is. To judge a star’s ...
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.