Life Cycle of Stars
... He noticed that there were redshifts in the emission of light from many dimly lit galaxies and realized that these were moving away from each other at a rate constant to the distance between them. He used this to formulate Hubble's Law (1929) which helped astronomers determine the age of the univers ...
... He noticed that there were redshifts in the emission of light from many dimly lit galaxies and realized that these were moving away from each other at a rate constant to the distance between them. He used this to formulate Hubble's Law (1929) which helped astronomers determine the age of the univers ...
No Slide Title
... scenario. We could not continue our trip back in time to the initial singularity because our tools (mathematical tools of general theory of relativity) should be substituted by tools of quantum gravity. According to quantum gravity (which in fact has not been yet fully designed) there is no time at ...
... scenario. We could not continue our trip back in time to the initial singularity because our tools (mathematical tools of general theory of relativity) should be substituted by tools of quantum gravity. According to quantum gravity (which in fact has not been yet fully designed) there is no time at ...
7_Big_bang
... Big Bang Summary • Universe contains countless galaxies like Milky Way. • A single galaxy can have 100s of billions of stars. • Spectrum (characteristic frequencies) of star light similar ...
... Big Bang Summary • Universe contains countless galaxies like Milky Way. • A single galaxy can have 100s of billions of stars. • Spectrum (characteristic frequencies) of star light similar ...
10.1
... to lower-energy, longer-wavelength, red-coloured light. A spectroscope is an instrument that can separate white light into its wavelengths of colour. If a star is moving toward you, its wavelengths become compressed. They are shifted more toward the violet end of the spectrum. If the star is moving ...
... to lower-energy, longer-wavelength, red-coloured light. A spectroscope is an instrument that can separate white light into its wavelengths of colour. If a star is moving toward you, its wavelengths become compressed. They are shifted more toward the violet end of the spectrum. If the star is moving ...
Outline 8: History of the Universe and Solar System
... • Is the Universe 20 BY old? • No, gravitational forces have slowed down the galaxies since the Big Bang. • (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. Thi ...
... • Is the Universe 20 BY old? • No, gravitational forces have slowed down the galaxies since the Big Bang. • (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. Thi ...
TA`s solution set
... If the universe were also infinitely old, then light would have had time to reach us along all of these sightlines! (If the universe had finite age, the light from sufficiently distant stars would not have had time to reach us and some lines of sight would appear dark.) Since the night sky is, in fa ...
... If the universe were also infinitely old, then light would have had time to reach us along all of these sightlines! (If the universe had finite age, the light from sufficiently distant stars would not have had time to reach us and some lines of sight would appear dark.) Since the night sky is, in fa ...
Bruemmer-Dark Matter
... The disk of the Milky Way is confirmed to be more or less free of dark matter ...
... The disk of the Milky Way is confirmed to be more or less free of dark matter ...
Looking back in time to the big bang theory activity
... The more blue shifted the light is from a galaxy the slower it is moving towards our own galaxy Cosmic microwave background radiation will eventually be detected as visible light ...
... The more blue shifted the light is from a galaxy the slower it is moving towards our own galaxy Cosmic microwave background radiation will eventually be detected as visible light ...
The Early Universe and the Big Bang
... heat could travel much faster in the early universe, allowing them to exchange heat while the universe was young because of the curvature of space, very distant regions are actually the same point the big bang started in one place so everything was initially at the same temperature they were origina ...
... heat could travel much faster in the early universe, allowing them to exchange heat while the universe was young because of the curvature of space, very distant regions are actually the same point the big bang started in one place so everything was initially at the same temperature they were origina ...
Science Quiz
... The Sun-How do prominences and solar flares (CME’s) affect Earth? What protects Earth from CME’s? ...
... The Sun-How do prominences and solar flares (CME’s) affect Earth? What protects Earth from CME’s? ...
Sample Exam 3
... D) the periods of Cepheid stars are too long to observe in distant galaxies. 24) The Hubble Space Telescope has been used to observe supernova type Ia in distant galaxies, to measure the distance using the brightness law—independent of the velocity redshift distance. The last supernova Ia in the Mil ...
... D) the periods of Cepheid stars are too long to observe in distant galaxies. 24) The Hubble Space Telescope has been used to observe supernova type Ia in distant galaxies, to measure the distance using the brightness law—independent of the velocity redshift distance. The last supernova Ia in the Mil ...
Questions
... B. Raisins are galaxies and bread represents space growing C. Raisins are galaxies moving away from each other through space D. The center of loaf is center of a universe of raisins, the stars ...
... B. Raisins are galaxies and bread represents space growing C. Raisins are galaxies moving away from each other through space D. The center of loaf is center of a universe of raisins, the stars ...
Where are we? Matter is made of atoms and molecules Atoms
... the Universe is cold and low density. as it expands, it cools matter (galaxies) gets further apart. ...
... the Universe is cold and low density. as it expands, it cools matter (galaxies) gets further apart. ...
Galactic Rotation and Dark Matter Powerpoint
... Indirect detection experiments search for the products of WIMP annihilation. If WIMPs are Majorana particles (the particle and antiparticle are the same) then two WIMPs colliding could annihilate to produce gamma rays or particle-antiparticle pairs. This could produce a significant number of gamma r ...
... Indirect detection experiments search for the products of WIMP annihilation. If WIMPs are Majorana particles (the particle and antiparticle are the same) then two WIMPs colliding could annihilate to produce gamma rays or particle-antiparticle pairs. This could produce a significant number of gamma r ...
ISP 205 Final Exam Seating Chart SIT IN CORRECT ROW
... Slide 9: Curve 4 question answered above. CMB is leftover radiation from when universe was filled by a fog of electrons, when temperature was 1000 times higher than it is now. It’s existence shows that U really did evolve from a previous hotter, denser state, so there really must have been a Big Ban ...
... Slide 9: Curve 4 question answered above. CMB is leftover radiation from when universe was filled by a fog of electrons, when temperature was 1000 times higher than it is now. It’s existence shows that U really did evolve from a previous hotter, denser state, so there really must have been a Big Ban ...
ISP 205: Visions of the Universe
... • We see objects as they were in the past: • 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. ...
... • We see objects as they were in the past: • 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. ...
Our Vast Universe
... But, when Isaac Newton discovered his law of gravity, he understood gravity to be a force that is always attractive. Therefore, every object in our universe must attract every other object and if the universe were finite, the entire universe would collapse on itself due to this attraction. ...
... But, when Isaac Newton discovered his law of gravity, he understood gravity to be a force that is always attractive. Therefore, every object in our universe must attract every other object and if the universe were finite, the entire universe would collapse on itself due to this attraction. ...
Rachel Henning
... electrons are captured by nuclei to form neutral atoms. The Universe becomes transparent to light (photons stop interacting with free electrons) resulting in the formation of the Cosmic Background Radiation. After 1 billion years, the temperature is 20 K and galaxies and stars have begun to form via ...
... electrons are captured by nuclei to form neutral atoms. The Universe becomes transparent to light (photons stop interacting with free electrons) resulting in the formation of the Cosmic Background Radiation. After 1 billion years, the temperature is 20 K and galaxies and stars have begun to form via ...
What is the Universe made of?
... people are made from. All matter is made up of combinations of 6 quarks, 6 leptons and their antiparticles. Particles such as the electron and neutrino are known as leptons. Particles such as the proton and neutron are made of three quarks, and are called baryons. Scientists often refer to ordinary ...
... people are made from. All matter is made up of combinations of 6 quarks, 6 leptons and their antiparticles. Particles such as the electron and neutrino are known as leptons. Particles such as the proton and neutron are made of three quarks, and are called baryons. Scientists often refer to ordinary ...
A Useful Hint - Division of Applied Mathematics
... Schroedinger’s cat that is dead and alive at the same time, with time reversals, to mention but a few of the entertaining ideas in speculation. It seems that the principle in cosmology is ...
... Schroedinger’s cat that is dead and alive at the same time, with time reversals, to mention but a few of the entertaining ideas in speculation. It seems that the principle in cosmology is ...
Higher Hubble`s Law and the Big Bang Answers
... When the universe cooled sufficiently to form atoms, photons of radiation were able to travel distances which propagated the entire universe. Red shift which shows stars and galaxies are moving away from us in the continual expansion of the universe.. In the early expansion quarks began to combine t ...
... When the universe cooled sufficiently to form atoms, photons of radiation were able to travel distances which propagated the entire universe. Red shift which shows stars and galaxies are moving away from us in the continual expansion of the universe.. In the early expansion quarks began to combine t ...
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.