Section 19.3
... It implies that the universe must have had a beginning. Astronomers today believe the universe exploded outward from a single point. This idea is known as the Big Bang theory. ...
... It implies that the universe must have had a beginning. Astronomers today believe the universe exploded outward from a single point. This idea is known as the Big Bang theory. ...
Mass Outflow in the Seyfert 1 Galaxy NGC 4151
... But…was it a black-body? • Cosmic Background Explorer (COBE) 1989; confirmed it was B-body (T = 2.7 K, in agreement with predictions) – z ~ 1000 • Originally from gas clouds of T ~ 3000K • Almost perfectly isotropic – some blueshift in direction of the Milky Way’s motion towards Virgo Cluster ...
... But…was it a black-body? • Cosmic Background Explorer (COBE) 1989; confirmed it was B-body (T = 2.7 K, in agreement with predictions) – z ~ 1000 • Originally from gas clouds of T ~ 3000K • Almost perfectly isotropic – some blueshift in direction of the Milky Way’s motion towards Virgo Cluster ...
runaway - Astronomy & Astrophysics Group
... The galaxy is, in fact, nothing but a collection of innumerable stars grouped together in clusters. Upon whatever part of it the telescope is directed, a vast crowd of stars is immediately presented to view. Many of them are rather large and quite bright, while the number of smaller ones is quite be ...
... The galaxy is, in fact, nothing but a collection of innumerable stars grouped together in clusters. Upon whatever part of it the telescope is directed, a vast crowd of stars is immediately presented to view. Many of them are rather large and quite bright, while the number of smaller ones is quite be ...
History of the Universe and Solar System
... Its distance is 3.96 x1022 km (4 billion light years based on luminosity of stars; farther stars are dimmer) ...
... Its distance is 3.96 x1022 km (4 billion light years based on luminosity of stars; farther stars are dimmer) ...
0708 - Astronomy
... If the Universe is expanding, does that also mean that the Galaxy and the Solar system are expanding? ...
... If the Universe is expanding, does that also mean that the Galaxy and the Solar system are expanding? ...
Document
... like the Moon is to Earth, so one side of the planet is always facing its star. This setup creates one of the largest temperature differences astronomers have ever seen on an exoplanet. One side of the planet is always hot as lava, while the other is chilled possibly below freezing. ...
... like the Moon is to Earth, so one side of the planet is always facing its star. This setup creates one of the largest temperature differences astronomers have ever seen on an exoplanet. One side of the planet is always hot as lava, while the other is chilled possibly below freezing. ...
The Solar System and our Universe
... • Telescopes (Hubble Space Telescope) take photos of stellar explosions & nebulae. • Provided evidence that throughout the universe stars are dying, and new stars & galaxies are constantly forming. ...
... • Telescopes (Hubble Space Telescope) take photos of stellar explosions & nebulae. • Provided evidence that throughout the universe stars are dying, and new stars & galaxies are constantly forming. ...
Image Credit - Northwestern University
... time, we can see the last scattering surface (opaque boundary). Doppler shift: observed radiation will be highly redshifted because of universe expansion. ...
... time, we can see the last scattering surface (opaque boundary). Doppler shift: observed radiation will be highly redshifted because of universe expansion. ...
Expansion of the Universe
... leaving mainly the red colors. However, this effect does *not* cause a frequency shift of the light waves. A spectrum of the source will not have any of its atomic lines displaced. 2. Gravitational Redshift - where the photons incur a loss of energy overcoming the effects of a gravity well. Since th ...
... leaving mainly the red colors. However, this effect does *not* cause a frequency shift of the light waves. A spectrum of the source will not have any of its atomic lines displaced. 2. Gravitational Redshift - where the photons incur a loss of energy overcoming the effects of a gravity well. Since th ...
Chapter 2 Basic Chemistry
... – Pressure in the core is more than a billion times the atmospheric pressure on Earth with a temperature hotter than 15 million kelvins – Get their energy from nuclear fusion • Combines the nuclei of hydrogen atoms into helium • When hydrogen nuclei collide, they fuse to form new nuclei called deute ...
... – Pressure in the core is more than a billion times the atmospheric pressure on Earth with a temperature hotter than 15 million kelvins – Get their energy from nuclear fusion • Combines the nuclei of hydrogen atoms into helium • When hydrogen nuclei collide, they fuse to form new nuclei called deute ...
The Runaway Universe - Astronomy & Astrophysics Group
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
AS 60 - Astronomy of the Americas
... a. As you watch it over the course of a year, an approaching galaxy will appear to grow larger in angular size on the sky b. Spectral lines of elements will be observed in the galaxy’s spectrum at greater wavelengths than those for the same elements in the lab if a galaxy is receding from us c. Spec ...
... a. As you watch it over the course of a year, an approaching galaxy will appear to grow larger in angular size on the sky b. Spectral lines of elements will be observed in the galaxy’s spectrum at greater wavelengths than those for the same elements in the lab if a galaxy is receding from us c. Spec ...
Solar System
... Solar System Notes – Part 1 Universe: all of space and ________________________________________________ Galaxy: A large group of __________________________________, solar systems, and associated gas and dust in space that is bound by _____________________________ Solar System: Composed of one ...
... Solar System Notes – Part 1 Universe: all of space and ________________________________________________ Galaxy: A large group of __________________________________, solar systems, and associated gas and dust in space that is bound by _____________________________ Solar System: Composed of one ...
Word - Sam Davyson
... distance. Once again the is determined from the movement of the black lines in the spectrum. The fact that everything measured shows a > 0 indicates that the distances between every pair of objects is increasing (except locally where gravity can cause the reverse effect) and that the universe ...
... distance. Once again the is determined from the movement of the black lines in the spectrum. The fact that everything measured shows a > 0 indicates that the distances between every pair of objects is increasing (except locally where gravity can cause the reverse effect) and that the universe ...
The cosmological constant puzzle: vacuum energies from QCD to
... Anomaly cancelation wanted in UV, so DSB should be active there ...
... Anomaly cancelation wanted in UV, so DSB should be active there ...
History Test Review Answers - School District of La Crosse
... 27.Plato's problem in describing the heavens was: HOW HEAVENS MOVED , NOT WHY 28.The law of Kepler which states" planets will sweep out equal areas in equal time" is: SECOND LAW OF PLANETARY MOTON 29. According to Copernicus retrograde motion is explained by: RELATIVE POSITION OF THE SUN, EARTH AND ...
... 27.Plato's problem in describing the heavens was: HOW HEAVENS MOVED , NOT WHY 28.The law of Kepler which states" planets will sweep out equal areas in equal time" is: SECOND LAW OF PLANETARY MOTON 29. According to Copernicus retrograde motion is explained by: RELATIVE POSITION OF THE SUN, EARTH AND ...
SNC1PL The Life Cycle of Stars
... outside of the Milky Way and represented other galaxies, implying that the Universe is much larger than the Milky Way Galaxy. ...
... outside of the Milky Way and represented other galaxies, implying that the Universe is much larger than the Milky Way Galaxy. ...
Math Primer - UMass Amherst
... You can say the distance to Boston in miles (or km) instead of inches (or cm)! Translating to useful units is a very handy skill. The key to changing units is remembering to replace a unit by something equivalent ...
... You can say the distance to Boston in miles (or km) instead of inches (or cm)! Translating to useful units is a very handy skill. The key to changing units is remembering to replace a unit by something equivalent ...
universe
... A solar system consists of one or a number of stars, surrounded by a number of planets and planetary bodies held by gravitation. ...
... A solar system consists of one or a number of stars, surrounded by a number of planets and planetary bodies held by gravitation. ...
Which of the following is the best description of an Sc galaxy? A) a
... The expansion age of the universe is about A) 1 billion years B) 10 billion years C) 100 billion years D) 1000 billion years If the universe is dominated by dark energy, then the rate of expansion of the universe is A) slowing down B) accelerating C) exactly constant with time D) zero, the universe ...
... The expansion age of the universe is about A) 1 billion years B) 10 billion years C) 100 billion years D) 1000 billion years If the universe is dominated by dark energy, then the rate of expansion of the universe is A) slowing down B) accelerating C) exactly constant with time D) zero, the universe ...
Bang To Sol - Transcript
... cooled. Finally it was cool enough for the electrons to be captured by the hydrogen and helium nuclei and the first atoms were formed. Suddenly, light could race thru the universe without bumping into charged particles and the universe became transparent and dark -- filled mostly with clouds of hydr ...
... cooled. Finally it was cool enough for the electrons to be captured by the hydrogen and helium nuclei and the first atoms were formed. Suddenly, light could race thru the universe without bumping into charged particles and the universe became transparent and dark -- filled mostly with clouds of hydr ...
Problem Set # 7: The Penultimate Problem Set Due Wednesday
... 1) [20 points] The age of the universe (that is, the time since the Big Bang) is 13.7 billion years. The age of the Solar System is 4.56 billion years. Thus, the Solar System has existed for 33.3% of the age of the universe. For what percentage of the total age of the universe have the following th ...
... 1) [20 points] The age of the universe (that is, the time since the Big Bang) is 13.7 billion years. The age of the Solar System is 4.56 billion years. Thus, the Solar System has existed for 33.3% of the age of the universe. For what percentage of the total age of the universe have the following th ...
Physical cosmology
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate. For most of human history, it was a branch of metaphysics and religion. Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed us to understand those physical laws.Physical cosmology, as it is now understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the universe contains a huge number of external galaxies beyond our own Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding. These advances made it possible to speculate about the origin of the universe, and allowed the establishment of the Big Bang Theory, by Georges Lemaitre, as the leading cosmological model. A few researchers still advocate a handful of alternative cosmologies; however, most cosmologists agree that the Big Bang theory explains the observations better.Dramatic advances in observational cosmology since the 1990s, including the cosmic microwave background, distant supernovae and galaxy redshift surveys, have led to the development of a standard model of cosmology. This model requires the universe to contain large amounts of dark matter and dark energy whose nature is currently not well understood, but the model gives detailed predictions that are in excellent agreement with many diverse observations.Cosmology draws heavily on the work of many disparate areas of research in theoretical and applied physics. Areas relevant to cosmology include particle physics experiments and theory, theoretical and observational astrophysics, general relativity, quantum mechanics, and plasma physics.