A time travel of 14 billion years
... •It occurred right here, nearly 14 billion years ago. • All matter and energy of the Universe were concentrated in a very small space region. •At the beginning temperature was extremely high. Nuclei and atom constituents formed a primordial soup. •Since that moment the Universe expanded and cooled d ...
... •It occurred right here, nearly 14 billion years ago. • All matter and energy of the Universe were concentrated in a very small space region. •At the beginning temperature was extremely high. Nuclei and atom constituents formed a primordial soup. •Since that moment the Universe expanded and cooled d ...
Ch 17n18 AGN Cosmology
... If our universe is expanding, then it must have started from a small, high-density, high-temperature state (run the “video” backwards). There must be a beginning! This beginning was derisively called “the big bang” by Fred Hoyle, a strong critic. Many astronomers were repulsed at the idea of a finit ...
... If our universe is expanding, then it must have started from a small, high-density, high-temperature state (run the “video” backwards). There must be a beginning! This beginning was derisively called “the big bang” by Fred Hoyle, a strong critic. Many astronomers were repulsed at the idea of a finit ...
Cosmology
... Way is about 104 pc, whereas the size of the solar system is about 10-4 pc. If the distance to the center of the Milky Way were scaled to the size of this room (10 meters), then on the same scale the solar system would be about the size of: ...
... Way is about 104 pc, whereas the size of the solar system is about 10-4 pc. If the distance to the center of the Milky Way were scaled to the size of this room (10 meters), then on the same scale the solar system would be about the size of: ...
Pre-lab 12: Galaxies and the Expansion of the Universe So far we
... So far we have talked about our solar system and the local galactic neighborhood. In the next few labs we will begin discussing the entire universe at a glance. First, let us get an idea of how the individual stars in a typical galaxy are laid out. As we learned from previous labs, stars themselves ...
... So far we have talked about our solar system and the local galactic neighborhood. In the next few labs we will begin discussing the entire universe at a glance. First, let us get an idea of how the individual stars in a typical galaxy are laid out. As we learned from previous labs, stars themselves ...
Chapter 7 Review Answers
... wondered where that extra energy created by the hot, short wavelengths at the beginning of the universe (BBT) went. That extra radiation should be present throughout the universe if the BBT was to be true. We believe now that the cosmic background radiation is that extra energy/radiation. The CBR fo ...
... wondered where that extra energy created by the hot, short wavelengths at the beginning of the universe (BBT) went. That extra radiation should be present throughout the universe if the BBT was to be true. We believe now that the cosmic background radiation is that extra energy/radiation. The CBR fo ...
Astro Review - Blank - Mayfield City Schools
... 6. ___g_ matter not visible through current methods, but observable through gravitational interactions between galaxies 7. ___b_ apparent shift toward longer wavelengths of light when a luminous object moves away from the viewer 8. ___f_ steady but faint microwaves from all over the sky 9. __h_ the ...
... 6. ___g_ matter not visible through current methods, but observable through gravitational interactions between galaxies 7. ___b_ apparent shift toward longer wavelengths of light when a luminous object moves away from the viewer 8. ___f_ steady but faint microwaves from all over the sky 9. __h_ the ...
The Origin of the Universe - Christos N. Hadjichristidis
... If there is not so much matter but rather dark energy -- the force that acts like anti-gravity -- then the Universe will continue to expand until every single speck of matter is pulled infinitely apart from each other. A more pleasant notion is the situation where the Universe has just the right amo ...
... If there is not so much matter but rather dark energy -- the force that acts like anti-gravity -- then the Universe will continue to expand until every single speck of matter is pulled infinitely apart from each other. A more pleasant notion is the situation where the Universe has just the right amo ...
ScalesOfSpace&Time
... Large-Scale Structure A large survey of distant galaxies shows the largest structures in the universe: ...
... Large-Scale Structure A large survey of distant galaxies shows the largest structures in the universe: ...
Redshift takes us from 2-D to 3-D
... But then the past shouldn’t look different than the present (on average) 3) The Universe was hot and opaque in the distant past. This is proven by the thermal cosmic background radiation. Only if all space were opaque would all space be filled with thermal photons (and their current temperature is r ...
... But then the past shouldn’t look different than the present (on average) 3) The Universe was hot and opaque in the distant past. This is proven by the thermal cosmic background radiation. Only if all space were opaque would all space be filled with thermal photons (and their current temperature is r ...
Steady-State Theory
... to oppose the Big Bang. Also called the Infinite Universe Theory. Has since been disproven. • Big Bang Theory: Proposed as early as 1912, it is the theory with the most evidence and best explains the current state of the universe. ...
... to oppose the Big Bang. Also called the Infinite Universe Theory. Has since been disproven. • Big Bang Theory: Proposed as early as 1912, it is the theory with the most evidence and best explains the current state of the universe. ...
document
... THE LIFE OF OUR UNIVERSE IS ABOUT 14 BILLION YEARS. LIGHT SIGNALS HAVE NOT HAD TIME TO TRAVEL MORE THAN 14 BILLION LIGHT YEARS. SO, WE CAN’T OBSERVE ANYTHING OUTSIDE OF THIS SPHERE. “Our currently observable universe is but one small part of a greater whole. But if the laws of physics can enforce t ...
... THE LIFE OF OUR UNIVERSE IS ABOUT 14 BILLION YEARS. LIGHT SIGNALS HAVE NOT HAD TIME TO TRAVEL MORE THAN 14 BILLION LIGHT YEARS. SO, WE CAN’T OBSERVE ANYTHING OUTSIDE OF THIS SPHERE. “Our currently observable universe is but one small part of a greater whole. But if the laws of physics can enforce t ...
Chapter 12
... is called a supernova. After this explosion, leftover star material may form a neutron star. After a large mass star explodes, a large amount of mass remains and the gravity of the mass is soo strong that the gas is pulled ...
... is called a supernova. After this explosion, leftover star material may form a neutron star. After a large mass star explodes, a large amount of mass remains and the gravity of the mass is soo strong that the gas is pulled ...
Getting to Know: Theories About How the Universe Formed
... behind. Future scientific studies may add more ideas to the Big Bang Theory. However, today, many scientists believe that the Big Bang Theory is the best scientific answer for how the universe formed. ...
... behind. Future scientific studies may add more ideas to the Big Bang Theory. However, today, many scientists believe that the Big Bang Theory is the best scientific answer for how the universe formed. ...
Slide 1
... the Big Bang theory. For example, we tend to imagine a giant explosion. Experts however say that there was no explosion; there was (and continues to be) an expansion. Rather than imagining a balloon popping and releasing its contents, imagine a balloon expanding: an infinitesimally small balloon exp ...
... the Big Bang theory. For example, we tend to imagine a giant explosion. Experts however say that there was no explosion; there was (and continues to be) an expansion. Rather than imagining a balloon popping and releasing its contents, imagine a balloon expanding: an infinitesimally small balloon exp ...
New Directions
... There were a few unresolved issues, however 1900: Lord Kelvin gave a lecture to the Royal Institution of Great Britain titled “NineteenthCentury Clouds over the Dynamical Theory of Heat and Light” He was talking about the null result of the Michelson-Morley experiment and the problems of blackbo ...
... There were a few unresolved issues, however 1900: Lord Kelvin gave a lecture to the Royal Institution of Great Britain titled “NineteenthCentury Clouds over the Dynamical Theory of Heat and Light” He was talking about the null result of the Michelson-Morley experiment and the problems of blackbo ...
Age, EvoluFon, and Size of the Cosmos
... • Protons and neutrons are able to bind together to form nuclei since their binding energy is now greater than the cosmic background radia+on energy, so the background of light (photons) can’t break th ...
... • Protons and neutrons are able to bind together to form nuclei since their binding energy is now greater than the cosmic background radia+on energy, so the background of light (photons) can’t break th ...
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 ...
Planck Era
... Most people are familiar with the term 'Big Bang' theory. However when astronomer Sir Fred Hoyle first coined the phrase 'Big Bang' he did so in order to mock the theory. Hoyle was a firm believer in the alternative steady state theory which gives the universe no start or end. However the name stuc ...
... Most people are familiar with the term 'Big Bang' theory. However when astronomer Sir Fred Hoyle first coined the phrase 'Big Bang' he did so in order to mock the theory. Hoyle was a firm believer in the alternative steady state theory which gives the universe no start or end. However the name stuc ...
Brief Research Statement
... Effects of Minimal Length on Quantum Mechanical Scattering Minimal length seems to be a nearly universal concept in quantum gravity. In order to make the uncertainty principle compatible with the notion of minimal length, one must modify the uncertainty principle. This modification is known as the G ...
... Effects of Minimal Length on Quantum Mechanical Scattering Minimal length seems to be a nearly universal concept in quantum gravity. In order to make the uncertainty principle compatible with the notion of minimal length, one must modify the uncertainty principle. This modification is known as the G ...
THE HISTORY OF THE UNIVERSE IN ONE EASY LESSON
... THE LIFE OF OUR UNIVERSE IS ABOUT 14 BILLION YEARS. LIGHT SIGNALS HAVE NOT HAD TIME TO TRAVEL MORE THAN 14 BILLION LIGHT YEARS. SO, WE CAN’T OBSERVE ANYTHING OUTSIDE OF THIS SPHERE. “Our currently observable universe is but one small part of a greater whole. But if the laws of physics can enforce t ...
... THE LIFE OF OUR UNIVERSE IS ABOUT 14 BILLION YEARS. LIGHT SIGNALS HAVE NOT HAD TIME TO TRAVEL MORE THAN 14 BILLION LIGHT YEARS. SO, WE CAN’T OBSERVE ANYTHING OUTSIDE OF THIS SPHERE. “Our currently observable universe is but one small part of a greater whole. But if the laws of physics can enforce t ...
Introduction: Where and When Are We in the Universe?
... Groups – Only have one or two major galaxies We are in the “local group” A few dozen but most are small Main galaxies – Milky Way galaxy and the Andromeda galaxy which is 2 million light years away from the Milky Way galaxy o Galactic super cluster/group – 10s-100s of thousands of galaxies ...
... Groups – Only have one or two major galaxies We are in the “local group” A few dozen but most are small Main galaxies – Milky Way galaxy and the Andromeda galaxy which is 2 million light years away from the Milky Way galaxy o Galactic super cluster/group – 10s-100s of thousands of galaxies ...
Historical overview
... peculiar velocities are insignificant in comparison; therefore “redshift” is often used to indicate the distance of an object rather than quoting it in ...
... peculiar velocities are insignificant in comparison; therefore “redshift” is often used to indicate the distance of an object rather than quoting it in ...
document
... • Edgar Allen Poe noted that universe may have been “created” and thus is not eternal – The distance light travels over the life of the universe is our “horizon”. ...
... • Edgar Allen Poe noted that universe may have been “created” and thus is not eternal – The distance light travels over the life of the universe is our “horizon”. ...
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.