大爆炸---宇宙的起源 - 中正大學化學系
... body thermal energy coming from all parts of the sky. The radiation is isotropic to roughly one part in 100,000. As the universe expanded, adiabatic cooling caused the plasma to lose energy until it became favorable for electrons to combine with protons, forming hydrogen atoms. This recombination ev ...
... body thermal energy coming from all parts of the sky. The radiation is isotropic to roughly one part in 100,000. As the universe expanded, adiabatic cooling caused the plasma to lose energy until it became favorable for electrons to combine with protons, forming hydrogen atoms. This recombination ev ...
大爆炸---宇宙的起源
... body thermal energy coming from all parts of the sky. The radiation is isotropic to roughly one part in 100,000. As the universe expanded, adiabatic cooling caused the plasma to lose energy until it became favorable for electrons to combine with protons, forming hydrogen atoms. This recombination ev ...
... body thermal energy coming from all parts of the sky. The radiation is isotropic to roughly one part in 100,000. As the universe expanded, adiabatic cooling caused the plasma to lose energy until it became favorable for electrons to combine with protons, forming hydrogen atoms. This recombination ev ...
Slide 1
... Cern is a place in Genva where scientists have spent the past 30 years building a massive 17 mile underground ring of magnets and special tubing. The idea simply is to force two very fast streams of lead ions (atoms with extra electrons) together at speed and see what happens. The LHC will collide ...
... Cern is a place in Genva where scientists have spent the past 30 years building a massive 17 mile underground ring of magnets and special tubing. The idea simply is to force two very fast streams of lead ions (atoms with extra electrons) together at speed and see what happens. The LHC will collide ...
La teoria del big bang y la formacion del Universo
... • Within a few hundred million years after the Big Bang, the hydrogen and helium had pulled together under the force of gravity to form stars, which shine because hydrogen atoms are fusing together to make helium atoms, releasing radiation energy in the process. • When the hydrogen runs out, the s ...
... • Within a few hundred million years after the Big Bang, the hydrogen and helium had pulled together under the force of gravity to form stars, which shine because hydrogen atoms are fusing together to make helium atoms, releasing radiation energy in the process. • When the hydrogen runs out, the s ...
Monday, December 8 - Otterbein University
... • Tried to “debug” their horn antenna • Couldn’t get rid of “background noise” Signal from Big Bang • Very, very isotropic (1 part in 100,000) ...
... • Tried to “debug” their horn antenna • Couldn’t get rid of “background noise” Signal from Big Bang • Very, very isotropic (1 part in 100,000) ...
Expansion of the Universe
... 1. Scattering of blue and green light - i.e. why the sky appears blue, and why some sunrises or sunsets may appear red. Dust, smoke from forest fires, or other intervening material between the source and the observer can scatter (remove) the higher frequency colors (blue, green, yellow, and orange) ...
... 1. Scattering of blue and green light - i.e. why the sky appears blue, and why some sunrises or sunsets may appear red. Dust, smoke from forest fires, or other intervening material between the source and the observer can scatter (remove) the higher frequency colors (blue, green, yellow, and orange) ...
Pre-lab 12: Galaxies and the Expansion of the Universe So far we
... How big is the universe in total? For reasons we will discuss in the lab, it is a tricky question with no easy answer. Some estimates have it as big as 32,000 Megaparsecs in diameter. Some estimates have it even bigger. Some even think it goes on forever. However, there is a limit to how far out we ...
... How big is the universe in total? For reasons we will discuss in the lab, it is a tricky question with no easy answer. Some estimates have it as big as 32,000 Megaparsecs in diameter. Some estimates have it even bigger. Some even think it goes on forever. However, there is a limit to how far out we ...
August 29 - Astronomy
... Doppler shifts are caused by the motion through space, cosmological redshifts are caused by the expansion of space. But there is no way to tell the difference from observations ...
... Doppler shifts are caused by the motion through space, cosmological redshifts are caused by the expansion of space. But there is no way to tell the difference from observations ...
The Big Bang
... curve outward. Most new stars are found in the arms. Elliptical – A round flattened ball. Contains mostly old stars. Irregular – No certain shape. Contain many bright young stars and much dust and gas. ...
... curve outward. Most new stars are found in the arms. Elliptical – A round flattened ball. Contains mostly old stars. Irregular – No certain shape. Contain many bright young stars and much dust and gas. ...
universe
... b) explain how the Sun and other stars transform matter into energy through nuclear fusion; and c) investigate the process by which a supernova can lead to the formation of successive generation stars and planets. ...
... b) explain how the Sun and other stars transform matter into energy through nuclear fusion; and c) investigate the process by which a supernova can lead to the formation of successive generation stars and planets. ...
AGN-Hubble
... the amount of space between them increases. The scale of the Universe increases, but not the scale of particles, galaxies, or even clusters (anything bound). The expansion is only apparent on scales of millions of light years. ...
... the amount of space between them increases. The scale of the Universe increases, but not the scale of particles, galaxies, or even clusters (anything bound). The expansion is only apparent on scales of millions of light years. ...
Ch. 28 Test Topics
... -Know what the central black hole theory is. -Define escape velocity and know what the escape velocity is for a black hole. -Know that the distances between stars are 10,000 times greater than the distances between planets. -Know that the distances between galaxies are a million times greater than t ...
... -Know what the central black hole theory is. -Define escape velocity and know what the escape velocity is for a black hole. -Know that the distances between stars are 10,000 times greater than the distances between planets. -Know that the distances between galaxies are a million times greater than t ...
The Runaway Universe - Astronomy & Astrophysics Group
... 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 about it. The galaxy is, in fact, nothing but a colle ...
... 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 about it. The galaxy is, in fact, nothing but a colle ...
Name
... questions: 1. Is the universe expanding or getting smaller? 2. What evidence did the WMAP provide scientists about the big bang theory? 3. Is the universe cooling or getting hotter? 4. How has the amount of hydrogen and helium changed and how does the support the big bang? 5. What is Hubble’s Law an ...
... questions: 1. Is the universe expanding or getting smaller? 2. What evidence did the WMAP provide scientists about the big bang theory? 3. Is the universe cooling or getting hotter? 4. How has the amount of hydrogen and helium changed and how does the support the big bang? 5. What is Hubble’s Law an ...
Class 28, 27 July
... – A little later, the protons and neutrons make Helium (most Helium in the universe was formed in the first 3 minutes after the Big Bang) – Nuclei, electrons, and photons in big “soup” • Nuclei try to collapse (gravity), photons push back (pressure) • This leads to OSCILLATIONS! • Size of oscillatio ...
... – A little later, the protons and neutrons make Helium (most Helium in the universe was formed in the first 3 minutes after the Big Bang) – Nuclei, electrons, and photons in big “soup” • Nuclei try to collapse (gravity), photons push back (pressure) • This leads to OSCILLATIONS! • Size of oscillatio ...
Galaxies and the Universe
... The Universe • The sum of all space, matter, and energy that exists, has existed, or will exist • There is only one • You are part of it too! • We see it as it was in the past • Contains many other galaxies • Most of it is empty space ...
... The Universe • The sum of all space, matter, and energy that exists, has existed, or will exist • There is only one • You are part of it too! • We see it as it was in the past • Contains many other galaxies • Most of it is empty space ...
Galaxies and the Universe
... The Universe • The sum of all space, matter, and energy that exists, has existed, or will exist • There is only one • You are part of it too! • We see it as it was in the past • Contains many other galaxies • Most of it is empty space ...
... The Universe • The sum of all space, matter, and energy that exists, has existed, or will exist • There is only one • You are part of it too! • We see it as it was in the past • Contains many other galaxies • Most of it is empty space ...
Chapter 1 Notes
... Guidepost (continued) Another question to be answered is “How does you life span and human history fit into the age of the universe?” ...
... Guidepost (continued) Another question to be answered is “How does you life span and human history fit into the age of the universe?” ...
Stellar Evolution
... The Big Bang • Tremendous explosion started the expansion of the universe • All of the matter and energy of the universe was contained at one point ...
... The Big Bang • Tremendous explosion started the expansion of the universe • All of the matter and energy of the universe was contained at one point ...
ISP 205: Visions of the Universe
... • Light travels at a finite speed (300,000 km/s). • The farther away we look in distance, the further back we look in time. • Allows us to study the history of the Universe. ...
... • Light travels at a finite speed (300,000 km/s). • The farther away we look in distance, the further back we look in time. • Allows us to study the history of the Universe. ...
Cosmology Fact Sheet
... We only know the distance to certain objects in the universe, and even that isn’t very accurate. Parallax measurements using the Earth’s orbit as a baseline allow us to find the distance to stars in our own galaxy quite well. Distances longer than this are no good though. However, if you measure the ...
... We only know the distance to certain objects in the universe, and even that isn’t very accurate. Parallax measurements using the Earth’s orbit as a baseline allow us to find the distance to stars in our own galaxy quite well. Distances longer than this are no good though. However, if you measure the ...
GR Cosmology: The Robertson
... but not space. The spatial curvature k varies with time, in S (t ) 2 magnitude but not in sign. The Cosmic Time coordinate used is constructed so that for a "Fundamental Observer" at fixed , , , ds 2 c 2 dt 2 , hence the time coordinate is proper time for such an observer. All the standard a ...
... but not space. The spatial curvature k varies with time, in S (t ) 2 magnitude but not in sign. The Cosmic Time coordinate used is constructed so that for a "Fundamental Observer" at fixed , , , ds 2 c 2 dt 2 , hence the time coordinate is proper time for such an observer. All the standard a ...
ASTRONOMY WEBQUEST…… EXPLORE THE UNIVERSE
... http://library.thinkquest.org/26220/stars/formation.html What is a nebula (click on protostars)? ...
... http://library.thinkquest.org/26220/stars/formation.html What is a nebula (click on protostars)? ...
Flatness problem
The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special' values, and that a small deviation from these values would have had massive effects on the nature of the universe at the current time.In the case of the flatness problem, the parameter which appears fine-tuned is the density of matter and energy in the universe. This value affects the curvature of space-time, with a very specific critical value being required for a flat universe. The current density of the universe is observed to be very close to this critical value. Since the total density departs rapidly from the critical value over cosmic time, the early universe must have had a density even closer to the critical density, departing from it by one part in 1062 or less. This leads cosmologists to question how the initial density came to be so closely fine-tuned to this 'special' value.The problem was first mentioned by Robert Dicke in 1969. The most commonly accepted solution among cosmologists is cosmic inflation, the idea that the universe went through a brief period of extremely rapid expansion in the first fraction of a second after the Big Bang; along with the monopole problem and the horizon problem, the flatness problem is one of the three primary motivations for inflationary theory.