ASTR 001 Introduction to the Cosmos
... 23. Evidence that the cosmic background radiation really is the remnant of a Big Bang comes from predicting characteristics of remnant radiation from the Big Bang and comparing these predictions with observations. Four of the five statements below are real. Which one is fictitious? A) The cosmic ba ...
... 23. Evidence that the cosmic background radiation really is the remnant of a Big Bang comes from predicting characteristics of remnant radiation from the Big Bang and comparing these predictions with observations. Four of the five statements below are real. Which one is fictitious? A) The cosmic ba ...
Slide 1
... 1) the information about the initial abundance ratio, usually it is taken from the standard cosmology; that is why it is necessary to suppose the validity of this theory; 2) the universality of r-process, more exactly it is the hypothesis that the abundance ratios in the products of different supern ...
... 1) the information about the initial abundance ratio, usually it is taken from the standard cosmology; that is why it is necessary to suppose the validity of this theory; 2) the universality of r-process, more exactly it is the hypothesis that the abundance ratios in the products of different supern ...
age of the universe.
... In the first few minutes after the Big Bang, a) the universe cooled and formed neutral matter. b) the cosmic microwave background radiation was released. c) electrons recombined with protons. d) hydrogen fused into deuterium and then helium. e) the universe was governed by one unified superforce. Ex ...
... In the first few minutes after the Big Bang, a) the universe cooled and formed neutral matter. b) the cosmic microwave background radiation was released. c) electrons recombined with protons. d) hydrogen fused into deuterium and then helium. e) the universe was governed by one unified superforce. Ex ...
CosmologyL2
... the expansion is continually slowing down; blue - an open, low density universe, expansion is slowing down, but not as much because the pull of gravity is not as strong. red - a universe with a large fraction of matter in a form of dark energy, causing an accelerated expansion . ...
... the expansion is continually slowing down; blue - an open, low density universe, expansion is slowing down, but not as much because the pull of gravity is not as strong. red - a universe with a large fraction of matter in a form of dark energy, causing an accelerated expansion . ...
Origin of the Chemical Elements
... Chemical elements are central for the existence of life and the richness and variety of our environment. Therefore, one of the basic questions concerns the origin of the chemical elements. The answer is complex because it relies on dynamical processes from elementary particles and nuclei to stars an ...
... Chemical elements are central for the existence of life and the richness and variety of our environment. Therefore, one of the basic questions concerns the origin of the chemical elements. The answer is complex because it relies on dynamical processes from elementary particles and nuclei to stars an ...
PPT
... • Our vacuum can have unusual properties that one would not expect from Newton’s or Leibniz’ (or even Einstein’s) space. It now makes sense to ask, “Are the virtual particles in our vacuum aligned in some way?” Do the underlying equations of physics have any symmetry that is not manifested by the wo ...
... • Our vacuum can have unusual properties that one would not expect from Newton’s or Leibniz’ (or even Einstein’s) space. It now makes sense to ask, “Are the virtual particles in our vacuum aligned in some way?” Do the underlying equations of physics have any symmetry that is not manifested by the wo ...
The Early Universe
... maximum distance we can see out to in the Universe. More generally, for any point in the Universe, the horizon is the maximum distance from which light could have reached that point, within the age of the Universe. Nothing outside your horizon can have any effect on you, because it has never been in ...
... maximum distance we can see out to in the Universe. More generally, for any point in the Universe, the horizon is the maximum distance from which light could have reached that point, within the age of the Universe. Nothing outside your horizon can have any effect on you, because it has never been in ...
Radioactivity and man
... All matter that surrounds us is made up of atoms. Every atom consists of protons and neutrons, which together form the nucleus, surrounded by a cloud of negatively-charged electrons. Within the atom, the nucleus is made up of positively charged protons and by neutrons that lack electric charge and a ...
... All matter that surrounds us is made up of atoms. Every atom consists of protons and neutrons, which together form the nucleus, surrounded by a cloud of negatively-charged electrons. Within the atom, the nucleus is made up of positively charged protons and by neutrons that lack electric charge and a ...
Topic 4 - The University of Sheffield
... (1)!A MACHO Event should never repeat (they are too rare). (2)!The Light Curve for a MACHO should be symmetric in ! time, i.e. rising and falling with the same shape. (3)!The magnitude of the Light Amplification should be the ! ! same in all wavelengths e.g. the blue and red wavebands ! as typically ...
... (1)!A MACHO Event should never repeat (they are too rare). (2)!The Light Curve for a MACHO should be symmetric in ! time, i.e. rising and falling with the same shape. (3)!The magnitude of the Light Amplification should be the ! ! same in all wavelengths e.g. the blue and red wavebands ! as typically ...
Chapter 31 - The Galaxy & Universe
... A. Like other galaxies, but these are strong radio emitters. ...
... A. Like other galaxies, but these are strong radio emitters. ...
No Slide Title
... Hubble telescope was used to observe 19 galaxies out to 108 million lightyears. They discovered almost 800 Cepheid variable stars, a special class of pulsating star used for accurate distance measurements. Here is a picture of one of those galaxies. It is the spiral galaxy NGC 4603, the most distant ...
... Hubble telescope was used to observe 19 galaxies out to 108 million lightyears. They discovered almost 800 Cepheid variable stars, a special class of pulsating star used for accurate distance measurements. Here is a picture of one of those galaxies. It is the spiral galaxy NGC 4603, the most distant ...
Characteristics Of The Universe Origin Of Universe
... the universe were indeed expanding, and has been doing so for its entire existence, then there would have to be a moment in the distant past when the whole universe occupied just a single point. That moment, and that point, would be the origin of the cosmos. Lemaître’s work, and that of de Sitter an ...
... the universe were indeed expanding, and has been doing so for its entire existence, then there would have to be a moment in the distant past when the whole universe occupied just a single point. That moment, and that point, would be the origin of the cosmos. Lemaître’s work, and that of de Sitter an ...
Course 107: The Big Bang and the Anthropic Principle
... ○ Many things in the universe may either exist or not exist, and are all finite. ○ Such things are called __ beings. (not infinite; not eternal) ○ It is impossible for everything in the universe to be contingent, for then there would be a time when __ existed, and therefore, nothing would exist now ...
... ○ Many things in the universe may either exist or not exist, and are all finite. ○ Such things are called __ beings. (not infinite; not eternal) ○ It is impossible for everything in the universe to be contingent, for then there would be a time when __ existed, and therefore, nothing would exist now ...
Sunday March 5th
... – Finite but unbounded – like a GLOBE = favorite OUT – Infinite and unbounded – like a piece of paper - forever ...
... – Finite but unbounded – like a GLOBE = favorite OUT – Infinite and unbounded – like a piece of paper - forever ...
–1– Lectures 18 and 19 Optical Depth vs. Density Imaging a sphere
... on the evolution of mass and radius instead of the temperature and luminosity. One reason is that much of the luminosity of the star is accretion luminosity, and not emission from a stellar photosphere as in a normal star. Another reason is that accreting layers of gas may absorb the stellar radiati ...
... on the evolution of mass and radius instead of the temperature and luminosity. One reason is that much of the luminosity of the star is accretion luminosity, and not emission from a stellar photosphere as in a normal star. Another reason is that accreting layers of gas may absorb the stellar radiati ...
1. setting the scene 2. the cosmic dark ages and the first stars
... the Universe expanded (and cooled) from this initial infinitesimally small size which encompassed all of space, energy, matter and radiation, it remained opaque and inscrutable for the first 380 000 years, when photons and electrons were so strongly coupled together that light could not travel very ...
... the Universe expanded (and cooled) from this initial infinitesimally small size which encompassed all of space, energy, matter and radiation, it remained opaque and inscrutable for the first 380 000 years, when photons and electrons were so strongly coupled together that light could not travel very ...
Thermodynamics of the early universe, v.4 1 Astrophysical units
... dark matter even if we don’t know anything about the particles it consists of. But this conclusion should be ok as long as the known laws of physics applies to them. Until ten years ago it was generally believed that the universe contained only radiation and matter. But since then it has become cle ...
... dark matter even if we don’t know anything about the particles it consists of. But this conclusion should be ok as long as the known laws of physics applies to them. Until ten years ago it was generally believed that the universe contained only radiation and matter. But since then it has become cle ...
teachers version.
... 5) Watch Minute Physics: The Oldest Light in the Universe http://www.youtube.com/watch?NR=1&feature=endscreen&v=_mZQ-5-KYHw What is the cosmic background radiation and what does it have to do with the big bang? Student Answer: The universe used to be very hot and emitting light for that temperature. ...
... 5) Watch Minute Physics: The Oldest Light in the Universe http://www.youtube.com/watch?NR=1&feature=endscreen&v=_mZQ-5-KYHw What is the cosmic background radiation and what does it have to do with the big bang? Student Answer: The universe used to be very hot and emitting light for that temperature. ...
The Teleological Argument - University of Colorado Boulder
... He goes on to say that, even if the chain of watches extended infinitely back into the past, so that there have ALWAYS been watches making watches, this would not rid us of the need for a designer. If one watch requires a designer, and so do two watches, and one hundred, and one million watches, why ...
... He goes on to say that, even if the chain of watches extended infinitely back into the past, so that there have ALWAYS been watches making watches, this would not rid us of the need for a designer. If one watch requires a designer, and so do two watches, and one hundred, and one million watches, why ...
Document
... Bang the energy of neutrinos was so low that such processes could no longer occur and their number density was fixed to this day. This number is very similar to the one of the photons in the observed Cosmic Microwave Background Radiation, the so-called ‘afterglow’ of the Big Bang, making neutrinos t ...
... Bang the energy of neutrinos was so low that such processes could no longer occur and their number density was fixed to this day. This number is very similar to the one of the photons in the observed Cosmic Microwave Background Radiation, the so-called ‘afterglow’ of the Big Bang, making neutrinos t ...
The Designed `Just So` Universe Dr. Walter L. Bradley Walter L
... for multiple reasons. Note from Table 2 that the electromagnetic force is 1038 times stronger than the gravity force. It is the force of gravity that draws protons together in stars causing them to fuse together with a concurrent release of energy. The electromagnetic force causes them to repel. Bec ...
... for multiple reasons. Note from Table 2 that the electromagnetic force is 1038 times stronger than the gravity force. It is the force of gravity that draws protons together in stars causing them to fuse together with a concurrent release of energy. The electromagnetic force causes them to repel. Bec ...
"Cosmic furnaces"()
... from ancient times, it has often been worshipped. More recently, we have come to understand that not only do we rely on our local star to sustain us, but that we actually exist because of other, long dead, stars. The Earth, and almost everything on it, is made from the ashes of giant stars that live ...
... from ancient times, it has often been worshipped. More recently, we have come to understand that not only do we rely on our local star to sustain us, but that we actually exist because of other, long dead, stars. The Earth, and almost everything on it, is made from the ashes of giant stars that live ...