Before people could understand the history of the universe, they had
... • Ideal "standard candles" to survey the Universe - Their light curves and spectra are all nearly alike and they are bright enough to be seen across billions of light-years • By 1998, many of these supernovae analyzed in detail, leading scientists to conclude that the expansion of the Universe is no ...
... • Ideal "standard candles" to survey the Universe - Their light curves and spectra are all nearly alike and they are bright enough to be seen across billions of light-years • By 1998, many of these supernovae analyzed in detail, leading scientists to conclude that the expansion of the Universe is no ...
- Fermi Gamma-ray Space Telescope
... observations by FIRAS and longer wavelengths of DIRBE DMR and the shorter wavelengths of DIRBE ...
... observations by FIRAS and longer wavelengths of DIRBE DMR and the shorter wavelengths of DIRBE ...
Ch. 26.5: The Expanding Universe
... Dark Matter = Does not give off radiation & cannot be detected Exerts gravitational force on visible matter Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration du ...
... Dark Matter = Does not give off radiation & cannot be detected Exerts gravitational force on visible matter Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration du ...
IOSR Journal of Applied Physics (IOSR-JAP) ISSN: 2278-4861.
... After the super-explosion (The Big-Bang), according to the nebula hypothesis [1], the solar system began as a nebula, an area in the Milky Way Galaxy that was a swirling concentration of cold gas and dust. Due to some perturbation, possibly from the nearby supernova this cloud of gas and dust began ...
... After the super-explosion (The Big-Bang), according to the nebula hypothesis [1], the solar system began as a nebula, an area in the Milky Way Galaxy that was a swirling concentration of cold gas and dust. Due to some perturbation, possibly from the nearby supernova this cloud of gas and dust began ...
Which model predicts the youngest age for the universe today?
... • Scientists using white dwarf supernovae to measure distances discovered something quite strange ...
... • Scientists using white dwarf supernovae to measure distances discovered something quite strange ...
New Directions
... CMB photons, losing energy as they climb out of a gravitational potential, are ...
... CMB photons, losing energy as they climb out of a gravitational potential, are ...
Scott Lectures Kip S Thorne
... holes, neutron stars, white dwarfs, and phenomena in the very early universe), and the various techniques that are being developed to search for them: space‐based optical interferometry (LISA and the Big Bang Observer), pulsar timing arrays, CMB (LISA and the Big Bang Observer) pulsar timing arra ...
... holes, neutron stars, white dwarfs, and phenomena in the very early universe), and the various techniques that are being developed to search for them: space‐based optical interferometry (LISA and the Big Bang Observer), pulsar timing arrays, CMB (LISA and the Big Bang Observer) pulsar timing arra ...
Origins Of The Universe
... The fate of the Universe depends on how fast the expansion is, as well as the total mass within it (tricky to identify as our observations of how much mass are much lower than our predictions – most mass is probably contained within black holes / dark matter etc… which become difficult to identify ...
... The fate of the Universe depends on how fast the expansion is, as well as the total mass within it (tricky to identify as our observations of how much mass are much lower than our predictions – most mass is probably contained within black holes / dark matter etc… which become difficult to identify ...
Is space created and destroyed? 9 Feb 16 Feb 2012
... è A Type II supernova is a massive star that explodes when it runs out of fuel and pressure is insufficient to counter gravity. The hydrogen is from the outermost part of the star. è A Type I supernova is a white dwarf that explodes. A WD and giant orbit each other. Mass moves from the giant to the ...
... è A Type II supernova is a massive star that explodes when it runs out of fuel and pressure is insufficient to counter gravity. The hydrogen is from the outermost part of the star. è A Type I supernova is a white dwarf that explodes. A WD and giant orbit each other. Mass moves from the giant to the ...
The Universe: “Beyond the Big Bang” Video Questions
... 2. What is a major problem with the Big Bang theory? It doesn’t explain everything. 3. The Big Bang theory only deals with the aftermath. 4. What is the sun mostly made of? Hydrogen, mostly (and Helium) 5. What is the surface temperature of the Sun? 10,000° F 6. When did our Solar System form? 4.5 b ...
... 2. What is a major problem with the Big Bang theory? It doesn’t explain everything. 3. The Big Bang theory only deals with the aftermath. 4. What is the sun mostly made of? Hydrogen, mostly (and Helium) 5. What is the surface temperature of the Sun? 10,000° F 6. When did our Solar System form? 4.5 b ...
Development of the Modern “World View”
... the Andromeda spiral nebula was a separate galaxy, not a component of the Milky Way. Astronomers realized that the Milky Way was a galaxy, an “island universe” of stars, gas, and dust. The spiral nebulae were recognized as other island universes, stretching to enormous distances. From observations o ...
... the Andromeda spiral nebula was a separate galaxy, not a component of the Milky Way. Astronomers realized that the Milky Way was a galaxy, an “island universe” of stars, gas, and dust. The spiral nebulae were recognized as other island universes, stretching to enormous distances. From observations o ...
Lecture24
... The CMB was already visible in the data taken by Dunham and Adams of the properties of CN in the interstellar medium …back in 1937 The saw that CN was excited as if it was immersed in a thermal bath of radiation of temperature ...
... The CMB was already visible in the data taken by Dunham and Adams of the properties of CN in the interstellar medium …back in 1937 The saw that CN was excited as if it was immersed in a thermal bath of radiation of temperature ...
Why Study Cosmic Near Infrared Background? (1-4um)
... The SKA data should be correlated with CMB, and WMAP data are good enough! It is even plausible that the first convincing evidence for 21-cm from reionization would come from the cross-correlation signal. ...
... The SKA data should be correlated with CMB, and WMAP data are good enough! It is even plausible that the first convincing evidence for 21-cm from reionization would come from the cross-correlation signal. ...
Dark Matter and Dark Energy
... • Most of the mass-energy, about 95%, in the universe is ‘dark’. By dark we mean that it does not emit any form of electromagnetic radiation. • Dark energy and dark matter have not been directly observed but they have been inferred from observations of a wide variety of phenomena. There existence is ...
... • Most of the mass-energy, about 95%, in the universe is ‘dark’. By dark we mean that it does not emit any form of electromagnetic radiation. • Dark energy and dark matter have not been directly observed but they have been inferred from observations of a wide variety of phenomena. There existence is ...
Document
... Universe is finite in size Universe is finite in age Dust blocks out most light Light gets too redshifted to see ...
... Universe is finite in size Universe is finite in age Dust blocks out most light Light gets too redshifted to see ...
Class 28, 27 July
... • Timescale of: (total energy available)/(Power) – Total energy available is 10% of Sun’s mass, converted at ...
... • Timescale of: (total energy available)/(Power) – Total energy available is 10% of Sun’s mass, converted at ...
Telescopes: From Galileo to Hi
... How is the Universe put together? The Wilkinson Microwave Anisotropy Probe tells us about the state of the Universe 400,000 years after the Big Bang. ...
... How is the Universe put together? The Wilkinson Microwave Anisotropy Probe tells us about the state of the Universe 400,000 years after the Big Bang. ...
Cosmic Times 1955, 65 PPT
... Universe is expanding from a state of high density and pressure. Hydrogen & Helium were formed as universe cooled. There should be left over a background radiation with a temperature of ~ 5 Kelvin Hoyle scoffed at this theory and coined the term “Big Bang” ...
... Universe is expanding from a state of high density and pressure. Hydrogen & Helium were formed as universe cooled. There should be left over a background radiation with a temperature of ~ 5 Kelvin Hoyle scoffed at this theory and coined the term “Big Bang” ...
The Prelude - Solar Physics and Space Weather
... •At about t = 1 second, temperature fell below 6 X 109 K, electrons and positions annihilated to form low energy gammaray photons that can not reverse the process •As a result, matter and anti-matter content decreased, and radiation content increased •From 1 second to 380,000 years, the universe is ...
... •At about t = 1 second, temperature fell below 6 X 109 K, electrons and positions annihilated to form low energy gammaray photons that can not reverse the process •As a result, matter and anti-matter content decreased, and radiation content increased •From 1 second to 380,000 years, the universe is ...
runaway - Astronomy & Astrophysics Group
... The galaxy is, in fact, nothing but a collection of innumerable stars grouped together in clusters. Upon whatever part of it the telescope is directed, a vast crowd of stars is immediately presented to view. Many of them are rather large and quite bright, while the number of smaller ones is quite be ...
... The galaxy is, in fact, nothing but a collection of innumerable stars grouped together in clusters. Upon whatever part of it the telescope is directed, a vast crowd of stars is immediately presented to view. Many of them are rather large and quite bright, while the number of smaller ones is quite be ...
Bolometers evolution - Chalmers University of Technology
... • Catalog of all-sky submm point sources at tens mJy level (high sensitivity limited by confusion and extraterrestrial background in its spectral minimum) • Photometric spectra (SED), and their variability, high redshift evaluations • Syunyaev-Zeldovich effect (SZ cosmology) • Foreground sources for ...
... • Catalog of all-sky submm point sources at tens mJy level (high sensitivity limited by confusion and extraterrestrial background in its spectral minimum) • Photometric spectra (SED), and their variability, high redshift evaluations • Syunyaev-Zeldovich effect (SZ cosmology) • Foreground sources for ...
Lecture 1
... Observational astronomers refer to any massive component too dim to be detected (stellar remnants such as white dwarfs, neutron stars, and black holes) as dark matter. A more stringent definition is any massive component of the universe which doesn’t emit, absorb, or scatter light at all. The usual ...
... Observational astronomers refer to any massive component too dim to be detected (stellar remnants such as white dwarfs, neutron stars, and black holes) as dark matter. A more stringent definition is any massive component of the universe which doesn’t emit, absorb, or scatter light at all. The usual ...
Cosmic Times 1955, 65 PPT
... New matter can be created spontaneously as the universe expands (a few hundred atoms per year per galaxy) Expansion of universe and creation of new matter balanced via a negative energy. The universe is constant in its overall density ...
... New matter can be created spontaneously as the universe expands (a few hundred atoms per year per galaxy) Expansion of universe and creation of new matter balanced via a negative energy. The universe is constant in its overall density ...