the speed of dark energy
... “No cable,” Boris said. “Dark energy permeates everything, so it goes through Earth.” “Better yet,” said the professor. “Write this up and we’ll patent it. Investors will be pounding on the door. I’ll double your salary.” After Professor Harding left, Boris fiddled with the display. Curious how much ...
... “No cable,” Boris said. “Dark energy permeates everything, so it goes through Earth.” “Better yet,” said the professor. “Write this up and we’ll patent it. Investors will be pounding on the door. I’ll double your salary.” After Professor Harding left, Boris fiddled with the display. Curious how much ...
ABSTRACT The strong nuclear force which holds together the
... At first sight, it is very surprising that a strong short-range nuclear force should produce a weak super-residual force with an infinite range, (It's probably a dimensional thing.) but the strong nuclear force is very different from the residual force that keeps the protons and neutrons bound toget ...
... At first sight, it is very surprising that a strong short-range nuclear force should produce a weak super-residual force with an infinite range, (It's probably a dimensional thing.) but the strong nuclear force is very different from the residual force that keeps the protons and neutrons bound toget ...
Freeman_DM2
... heat transfer into the cold central regions. But further evolution can then lead to core collapse (as in globular clusters) and even steeper r -2 cusps (eg Burkert 2000, Dalcanton & Hogan 2000) Alternatively ... There are many ways to convert CDM cusps into flat central cores so that we do not see t ...
... heat transfer into the cold central regions. But further evolution can then lead to core collapse (as in globular clusters) and even steeper r -2 cusps (eg Burkert 2000, Dalcanton & Hogan 2000) Alternatively ... There are many ways to convert CDM cusps into flat central cores so that we do not see t ...
Astronomy (ASTR)
... we cannot see nor properly characterize, the so-called 'dark matter,' and of energy whose source is unknown and may defy knowing, the ubiquitous 'dark energy.' This course will attempt to elucidate what we currently understand about the composition, structure and evolution of the universe based on g ...
... we cannot see nor properly characterize, the so-called 'dark matter,' and of energy whose source is unknown and may defy knowing, the ubiquitous 'dark energy.' This course will attempt to elucidate what we currently understand about the composition, structure and evolution of the universe based on g ...
From Black Holes to Cosmology : The Universe in the
... Numerical relativity aims to obtain solutions to Einstein's equations with computers. As it provides a powerful tool to explore fundamental problems in physics and astrophysics, it has been a constant field of research since the 1990's, but spectacular progress has been made in the last decade due t ...
... Numerical relativity aims to obtain solutions to Einstein's equations with computers. As it provides a powerful tool to explore fundamental problems in physics and astrophysics, it has been a constant field of research since the 1990's, but spectacular progress has been made in the last decade due t ...
Andrew Sonnenschein: The level of poetry…
... When we look at the sun through dark glasses, we see a ball of fire that has a precise size, and yet there is gas around it. AG: If on a different scale I could stand at the centre of the sky, at the centre of the Universe, and see the sun, and see the stars, clearly there would be a distance betwee ...
... When we look at the sun through dark glasses, we see a ball of fire that has a precise size, and yet there is gas around it. AG: If on a different scale I could stand at the centre of the sky, at the centre of the Universe, and see the sun, and see the stars, clearly there would be a distance betwee ...
Galaxies - sciencejedi.com
... • What Zwicky discovered was that v > vesc ! The Coma Cluster should have flown apart long ago, but it was still holding together. • The only conclusion was there was some missing mass that wasn’t accounted for by the light – over 90%! By the 1970s, we had developed new kinds of astronomy using othe ...
... • What Zwicky discovered was that v > vesc ! The Coma Cluster should have flown apart long ago, but it was still holding together. • The only conclusion was there was some missing mass that wasn’t accounted for by the light – over 90%! By the 1970s, we had developed new kinds of astronomy using othe ...
Lecture01-ASTA01 - University of Toronto
... • And that’s only in the observable Universe! • 10% or more of those stars probably have families of planets like our solar system, and on some of those thousand billions of billions of planets liquid-water oceans and protective atmospheres may have sheltered the spark of life. We don’t know on how ...
... • And that’s only in the observable Universe! • 10% or more of those stars probably have families of planets like our solar system, and on some of those thousand billions of billions of planets liquid-water oceans and protective atmospheres may have sheltered the spark of life. We don’t know on how ...
Galaxies 1) What are galaxies? 2) The birth of galaxies 3
... Spiral and Barred Spiral Galaxies: Our galaxy, and our closest neighbour (Andromeda), are among this type. The Milky Way was thought to be an ordinary now it now seems we have a large bar near the nucleus where the spiral arms branch. Galaxies of this type have a large central bulge, expansive disks ...
... Spiral and Barred Spiral Galaxies: Our galaxy, and our closest neighbour (Andromeda), are among this type. The Milky Way was thought to be an ordinary now it now seems we have a large bar near the nucleus where the spiral arms branch. Galaxies of this type have a large central bulge, expansive disks ...
notes
... Our galaxy, and our closest neighbour (Andromeda), are among this type. The Milky Way was thought to be an ordinary now it now seems we have a large bar near the nucleus where the spiral arms branch. Galaxies of this type have a large central bulge, expansive disks, and a halo. They have bright cent ...
... Our galaxy, and our closest neighbour (Andromeda), are among this type. The Milky Way was thought to be an ordinary now it now seems we have a large bar near the nucleus where the spiral arms branch. Galaxies of this type have a large central bulge, expansive disks, and a halo. They have bright cent ...
Edwin Hubble (1889
... hundred times larger than previous estimates, and that the Sun is many tens of thousands of light years away from the center of the galaxy. The system of globular clusters, which is coincident in general, if not in detail, with the sidereal arrangement as a whole, appears to be somewhat ellipsoidal. ...
... hundred times larger than previous estimates, and that the Sun is many tens of thousands of light years away from the center of the galaxy. The system of globular clusters, which is coincident in general, if not in detail, with the sidereal arrangement as a whole, appears to be somewhat ellipsoidal. ...
Time After Time — Big Bang Cosmology and the Arrows
... that doesn’t turn back but moves us from birth to death. The psychological arrow is related to a computational arrow, if cognitive processes are computational – at least partly (omitting issues of phenomenal content aka qualia here). The causal arrow of time: effects never precede their causes, and ...
... that doesn’t turn back but moves us from birth to death. The psychological arrow is related to a computational arrow, if cognitive processes are computational – at least partly (omitting issues of phenomenal content aka qualia here). The causal arrow of time: effects never precede their causes, and ...
POISE AND EVOLUTION OF THE GALAXY : STRUCTURE ,
... Many essential paradoxes in the mechanical balance of the Galaxy are highlighted. We propose a unique and synthetic interpretation, including a cosmological theory of the origin of the observed cosmic rays, especially at the highest energies. It involves MATTER-ANTIMATTER ANNIHILATION in the median ...
... Many essential paradoxes in the mechanical balance of the Galaxy are highlighted. We propose a unique and synthetic interpretation, including a cosmological theory of the origin of the observed cosmic rays, especially at the highest energies. It involves MATTER-ANTIMATTER ANNIHILATION in the median ...
Cosmological solutions of the Einstein
... and cold dark matter (what is it ? 23%). The strongly time and scenario dependent energy density ρ(t) easily deviates by 60 orders of magnitude from ρ0,crit today, given the evolution during the enormous time span of the present age of the universe. In other words, the flat solution Ω = 1 is highly ...
... and cold dark matter (what is it ? 23%). The strongly time and scenario dependent energy density ρ(t) easily deviates by 60 orders of magnitude from ρ0,crit today, given the evolution during the enormous time span of the present age of the universe. In other words, the flat solution Ω = 1 is highly ...
The Big Bang
... • How is the initial state of the universe different from a black hole? • Did the universe start expanding immediately after the big bang? • What started the big bang anyway? • Will the universe expand forever? • Will the universe ever completely cool down? ...
... • How is the initial state of the universe different from a black hole? • Did the universe start expanding immediately after the big bang? • What started the big bang anyway? • Will the universe expand forever? • Will the universe ever completely cool down? ...
HEIC0007 Photo release: Stephan`s Quintet
... finally resolved. Hubble's resolution is so high that individual stars can be discerned in NGC 7320, showing that it is definitely closer than the more remote, compact group of galaxies. Today other measurements have also shown that the galaxies NGC 7320C and NGC 7318B are just passing and are not b ...
... finally resolved. Hubble's resolution is so high that individual stars can be discerned in NGC 7320, showing that it is definitely closer than the more remote, compact group of galaxies. Today other measurements have also shown that the galaxies NGC 7320C and NGC 7318B are just passing and are not b ...
Physical Relativism as an Interpretation of Existence
... of what happened before the beginning of the universe is rendered meaningless” [33, p.135], because, “when we add the effects of quantum theory to the theory of relativity, in extreme cases warpage can occur to such an extent that time behaves like another dimension of space. In the early universe–w ...
... of what happened before the beginning of the universe is rendered meaningless” [33, p.135], because, “when we add the effects of quantum theory to the theory of relativity, in extreme cases warpage can occur to such an extent that time behaves like another dimension of space. In the early universe–w ...
2.1 Hubble Space Telescope
... Astronomers were surprised to find that the galaxies’ estimated masses were so small, and the Spitzer Space Telescope was called upon to make precise ...
... Astronomers were surprised to find that the galaxies’ estimated masses were so small, and the Spitzer Space Telescope was called upon to make precise ...
Scientific Evidence for A
... the seventh day God completed His work which He had done; and He rested on the seventh day from all His work which He had done. Then God blessed the seventh day and sanctified it, because in it He rested from all His work which God had created and made. This is the account of the heavens and the ear ...
... the seventh day God completed His work which He had done; and He rested on the seventh day from all His work which He had done. Then God blessed the seventh day and sanctified it, because in it He rested from all His work which God had created and made. This is the account of the heavens and the ear ...
Studying the Universe Studying the Universe
... The simplest optical telescope has two lenses. One lens, called the objective lens, collects light and forms an image at the back of the telescope. The bigger the objective lens, the more light the telescope can gather. The second lens is located in the eyepiece of the telescope. This lens magnifies ...
... The simplest optical telescope has two lenses. One lens, called the objective lens, collects light and forms an image at the back of the telescope. The bigger the objective lens, the more light the telescope can gather. The second lens is located in the eyepiece of the telescope. This lens magnifies ...
PH109 Exploring the Universe, Test#4, Spring 2005 Please indicate
... a) strong radio sources identified with star-like images on photographs b) variable sources of light c) bright galaxies, and only later found to be radio sources d) the only type of radio source within our galaxy 17. Which type of galaxy contains the least amount of interstellar material? a) Ellipti ...
... a) strong radio sources identified with star-like images on photographs b) variable sources of light c) bright galaxies, and only later found to be radio sources d) the only type of radio source within our galaxy 17. Which type of galaxy contains the least amount of interstellar material? a) Ellipti ...
Elasticity and Fluid Physics
... a result, they will pass through the pores of a container. Scientists have found this phase only in helium, one of the few substances that remain a liquid within a few degrees of absolute zero: -459.67 ˚F or -273.15 ˚C. At absolute zero , atoms and molecules would have the least possible energy. ...
... a result, they will pass through the pores of a container. Scientists have found this phase only in helium, one of the few substances that remain a liquid within a few degrees of absolute zero: -459.67 ˚F or -273.15 ˚C. At absolute zero , atoms and molecules would have the least possible energy. ...
Interpretation of the evolution of universe through the consciousness
... die, and probably will die," Dr. Linde [16] said, "but the universe as a whole is immortal." Some theorists suggest that the Big Bang was not so much a birth as a transition, a "quantum leap" from some formless era of imaginary time, or from nothing at all. According to Heisenberg’s uncertainty prin ...
... die, and probably will die," Dr. Linde [16] said, "but the universe as a whole is immortal." Some theorists suggest that the Big Bang was not so much a birth as a transition, a "quantum leap" from some formless era of imaginary time, or from nothing at all. According to Heisenberg’s uncertainty prin ...
Investigate Planets, Stars, Galaxies, and the Universe
... another soccer ball 5,000 miles away — in Honolulu, Hawaii. The space between the two is mostly empty, except for a few clouds of gas. Movies sometimes show starships racing through the galaxy. They pass stars at the rate of one or two every second. That simply isn’t realistic. The gaps between star ...
... another soccer ball 5,000 miles away — in Honolulu, Hawaii. The space between the two is mostly empty, except for a few clouds of gas. Movies sometimes show starships racing through the galaxy. They pass stars at the rate of one or two every second. That simply isn’t realistic. The gaps between star ...
Stars, Galaxies, and the Universe
... all called ofstar space double systems, and starsclusters, star everything or binary in it. dust, stars. and gas bound together by gravity. An eclipsing Scientific notation binaryuses is a star powers system of ten in to which writeone very star cannot large orgalaxies be very seen small at times nu ...
... all called ofstar space double systems, and starsclusters, star everything or binary in it. dust, stars. and gas bound together by gravity. An eclipsing Scientific notation binaryuses is a star powers system of ten in to which writeone very star cannot large orgalaxies be very seen small at times nu ...
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.