HOT Big Bang
... hydrogen is a gas of atoms. Much of the interstellar gas in our Galaxy is atomic hydrogen. density ≈ 10 atoms/cm3 T ≈ 100 K ...
... hydrogen is a gas of atoms. Much of the interstellar gas in our Galaxy is atomic hydrogen. density ≈ 10 atoms/cm3 T ≈ 100 K ...
An Introduction - Solar Physics and Space Weather
... •At t=10-6 second, the temperature in the universe dropped to the threshold temperature of 1013 K, at which the photons can not produce proton and anti-proton pairs (and neutron and antineutron pairs) •At about t = 1 second, temperature fell below 6 X 109 K, electrons and positions annihilated to fo ...
... •At t=10-6 second, the temperature in the universe dropped to the threshold temperature of 1013 K, at which the photons can not produce proton and anti-proton pairs (and neutron and antineutron pairs) •At about t = 1 second, temperature fell below 6 X 109 K, electrons and positions annihilated to fo ...
Chapter 4 Vocabulary
... the final stage of an extremely massive star, which is invisible because its gravity prevents any form of radiation from escaping ...
... the final stage of an extremely massive star, which is invisible because its gravity prevents any form of radiation from escaping ...
Dark Matter and Dark Energy
... size, in fact its expansion is accelerating, when gravity should make it contract. ...
... size, in fact its expansion is accelerating, when gravity should make it contract. ...
Document
... space where they enrich clouds of Hydrogen and Helium that are about to form new stars. They also create the heavier elements (such as gold, silver, lead, and uranium) and distribute these as well. Their remnants generate the cosmic rays which lead to mutation and evolution in living cells. These su ...
... space where they enrich clouds of Hydrogen and Helium that are about to form new stars. They also create the heavier elements (such as gold, silver, lead, and uranium) and distribute these as well. Their remnants generate the cosmic rays which lead to mutation and evolution in living cells. These su ...
Homework 1 - Course Pages of Physics Department
... interpret the expansion of the universe as an actual motion of galaxies instead of an expansion of space itself. Consider thus a spherical group of galaxies in otherwise empty space. At a sufficiently large scale you can treat this as a homogeneous cloud (the galaxies are the cloud particles). Let t ...
... interpret the expansion of the universe as an actual motion of galaxies instead of an expansion of space itself. Consider thus a spherical group of galaxies in otherwise empty space. At a sufficiently large scale you can treat this as a homogeneous cloud (the galaxies are the cloud particles). Let t ...
The Universe - staff.harrisonburg.k12.va
... What do Quasars indicate…. • If the Big Bang really happened, the oldest objects should be at the edge of the universe. • Quasars are very old objects that give off large amounts of energy located at the edge of the Universe. ...
... What do Quasars indicate…. • If the Big Bang really happened, the oldest objects should be at the edge of the universe. • Quasars are very old objects that give off large amounts of energy located at the edge of the Universe. ...
The Universe
... What do Quasars indicate…. • If the Big Bang really happened, the oldest objects should be at the edge of the universe. • Quasars are very old objects that give off large amounts of energy located at the edge of the Universe. ...
... What do Quasars indicate…. • If the Big Bang really happened, the oldest objects should be at the edge of the universe. • Quasars are very old objects that give off large amounts of energy located at the edge of the Universe. ...
Cosmology
... • The earliest of radiations has redshifted into the microwave portion of the universe ...
... • The earliest of radiations has redshifted into the microwave portion of the universe ...
doc
... -> Coalescence (due to GR) and formation of a black hole. --- General relativity says that a close binary system will slowly decay, causing the objects to eventually merge. The upper limit of a neutron star is around 3 solar masses, so the resulting object (which would have a mass of about 6 solar m ...
... -> Coalescence (due to GR) and formation of a black hole. --- General relativity says that a close binary system will slowly decay, causing the objects to eventually merge. The upper limit of a neutron star is around 3 solar masses, so the resulting object (which would have a mass of about 6 solar m ...
Why space is dark at night
... the larger effect. We live inside a spherical shell of "Observable Universe" which has radius equal to the lifetime of the Universe. Objects more than about 13.7 thousand million years old (the latest figure) are too far away for their light ever to reach us. ...
... the larger effect. We live inside a spherical shell of "Observable Universe" which has radius equal to the lifetime of the Universe. Objects more than about 13.7 thousand million years old (the latest figure) are too far away for their light ever to reach us. ...
Galaxy Zoo: Pre and post‐workshop information
... distance of distant galaxies i.e. more distant galaxies are receding faster. The gradient of this graph is called H0 (Hubble’s constant), this gives the time since the Big Bang i.e. the age of the universe. The most accurate value for the Hubble constant has been determined using a different techniqu ...
... distance of distant galaxies i.e. more distant galaxies are receding faster. The gradient of this graph is called H0 (Hubble’s constant), this gives the time since the Big Bang i.e. the age of the universe. The most accurate value for the Hubble constant has been determined using a different techniqu ...
Intro to Cosmology!
... Superpartners exist in separate quantum Space-Time coordinates called “Superspace.” The existence of a superspace simplifies QFT significantly. General Relativity can be derived from the theory of Supersymmetry. Predicts the energy level of electroweak recombination to great accuracy. ...
... Superpartners exist in separate quantum Space-Time coordinates called “Superspace.” The existence of a superspace simplifies QFT significantly. General Relativity can be derived from the theory of Supersymmetry. Predicts the energy level of electroweak recombination to great accuracy. ...
Star Groups and Big Bang Power Point
... The Expanding Universe Using Hubble’s observations, astronomers have been able to determine that the universe is expanding. The expanding universe can be thought of as a raisin cake rising in the oven. If you were able to sit on one raisin, you would see all the other raisins moving away from y ...
... The Expanding Universe Using Hubble’s observations, astronomers have been able to determine that the universe is expanding. The expanding universe can be thought of as a raisin cake rising in the oven. If you were able to sit on one raisin, you would see all the other raisins moving away from y ...
ASTRONOMY WEBQUEST…… EXPLORE THE UNIVERSE
... 12. There are 3 main pieces of evidence that support The Big Bang Theory: a) Evidence of the _______________________________of the universe. In the year ________, Edwin Hubble observed that galaxies were generally receding from us provided the first clue that the Big Bang theory might be right b) Th ...
... 12. There are 3 main pieces of evidence that support The Big Bang Theory: a) Evidence of the _______________________________of the universe. In the year ________, Edwin Hubble observed that galaxies were generally receding from us provided the first clue that the Big Bang theory might be right b) Th ...
Document
... New matter can be created spontaneously as the universe expands (a few hundred atoms per year per galaxy) Expansion of universe and creation of new matter balanced via a negative energy. The universe is constant in its overall density ...
... New matter can be created spontaneously as the universe expands (a few hundred atoms per year per galaxy) Expansion of universe and creation of new matter balanced via a negative energy. The universe is constant in its overall density ...
understanding-the
... a. The red shift indicates that distant galaxies are moving away from each other. b. The red shift indicates that distant galaxies are moving towards each other. c. The blue shift indicates that distant galaxies are moving away from each other. d. The blue shift indicates that distant galaxies are m ...
... a. The red shift indicates that distant galaxies are moving away from each other. b. The red shift indicates that distant galaxies are moving towards each other. c. The blue shift indicates that distant galaxies are moving away from each other. d. The blue shift indicates that distant galaxies are m ...
Which model predicts the youngest age for the universe today?
... – Space has stretched since they gave off their light ...
... – Space has stretched since they gave off their light ...
PROYECTO FONDECYT N° 1020578
... In this proposal we want to study a wide range of cosmological models for the Universe, which might describe either early or the present stage of the Universe during its expansion. One of the key problems of the current cosmology is deciding which kind of matter sources are present in the Universe. ...
... In this proposal we want to study a wide range of cosmological models for the Universe, which might describe either early or the present stage of the Universe during its expansion. One of the key problems of the current cosmology is deciding which kind of matter sources are present in the Universe. ...
The Big Bang and Early Astronomers
... • Theories can be modified or rejected as more evidence is gathered • Theories are testable ASTRONOMY: The scientific study of the universe and the objects in it, including stars, planets, nebulae, and galaxies. Astronomy deals with the position, size, motion, composition, energy, and evolution of c ...
... • Theories can be modified or rejected as more evidence is gathered • Theories are testable ASTRONOMY: The scientific study of the universe and the objects in it, including stars, planets, nebulae, and galaxies. Astronomy deals with the position, size, motion, composition, energy, and evolution of c ...
Age, Evolution, and Size of the Cosmos
... • New physics is needed to resolve the singularity String theory? Loop quantum gravity? • What happened before the Big Bang? traditional answer: there was no time speculative ideas: Big Bounce • Big Bang is one of the greatest challenges in physics ...
... • New physics is needed to resolve the singularity String theory? Loop quantum gravity? • What happened before the Big Bang? traditional answer: there was no time speculative ideas: Big Bounce • Big Bang is one of the greatest challenges in physics ...
Integrative Studies 410 Our Place in the Universe
... • Is there a beginning? • Is there an end? ...
... • Is there a beginning? • Is there an end? ...
3OriginoftheUniverseandSS
... Inflationary Theory - predicts that there was a sudden expansion when the universe was very young, more extreme than predicted by the big bang theory! • Considered to be a “revised” Big Bang theory • The universe expanded and cooled until about 10-35 second after the big bang when it became so cool ...
... Inflationary Theory - predicts that there was a sudden expansion when the universe was very young, more extreme than predicted by the big bang theory! • Considered to be a “revised” Big Bang theory • The universe expanded and cooled until about 10-35 second after the big bang when it became so cool ...
Big Bang
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution. The model accounts for the fact that the universe expanded from a very high density and high temperature state, and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background, large scale structure, and Hubble's Law. If the known laws of physics are extrapolated beyond where they are valid, there is a singularity. Modern measurements place this moment at approximately 13.8 billion years ago, which is thus considered the age of the universe. After the initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later simple atoms. Giant clouds of these primordial elements later coalesced through gravity to form stars and galaxies.Since Georges Lemaître first noted, in 1927, that an expanding universe might be traced back in time to an originating single point, scientists have built on his idea of cosmic expansion. While the scientific community was once divided between supporters of two different expanding universe theories, the Big Bang and the Steady State theory, accumulated empirical evidence provides strong support for the former. In 1929, from analysis of galactic redshifts, Edwin Hubble concluded that galaxies are drifting apart, important observational evidence consistent with the hypothesis of an expanding universe. In 1965, the cosmic microwave background radiation was discovered, which was crucial evidence in favor of the Big Bang model, since that theory predicted the existence of background radiation throughout the universe before it was discovered. More recently, measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to dark energy's existence. The known physical laws of nature can be used to calculate the characteristics of the universe in detail back in time to an initial state of extreme density and temperature.