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... falls into another neutron star or black hole. The resulting explosion sends out particles and radiation all over the spectrum They are the most luminous things in the universe In May a GRB was seen at redshift 8. It is the farthest thing ever seen and occurred only 400 million years after the big b ...
... falls into another neutron star or black hole. The resulting explosion sends out particles and radiation all over the spectrum They are the most luminous things in the universe In May a GRB was seen at redshift 8. It is the farthest thing ever seen and occurred only 400 million years after the big b ...
Thermodynamical Model of the Universe
... Future Remarks and Conclusions We have extensively discussed the applicability of thermodynamics to the gravitational galaxy clustering and have come to know that both dynamical and statistical aspects are crucial to a deeper understanding of large scale structure of universe. The non-linear gravita ...
... Future Remarks and Conclusions We have extensively discussed the applicability of thermodynamics to the gravitational galaxy clustering and have come to know that both dynamical and statistical aspects are crucial to a deeper understanding of large scale structure of universe. The non-linear gravita ...
Readings for Prof. Michael J. Crowe`s Two Sessions on The
... About 6 billion years after the big bang, supernova events begin to occur: explosions of huge stars, These explosions, which involve thermonuclear fusion, lead to the formation of such heavier elements as oxygen, carbon, nitrogen, calcium, and iron.6 When did the solar system begin to form? What is ...
... About 6 billion years after the big bang, supernova events begin to occur: explosions of huge stars, These explosions, which involve thermonuclear fusion, lead to the formation of such heavier elements as oxygen, carbon, nitrogen, calcium, and iron.6 When did the solar system begin to form? What is ...
Group Problem 11 - University of St. Thomas
... Group Problem #11 Phys 112-1 F12 Page 1 of 4 Group problem #11: Capacitors, work and energy Two metal spheres are connected by a conducting wire. Sphere 1 has a radius, R1, a charge Q1, and an electric field strength at the surface of E1. Similarly Sphere 2 has a radius, R2, a charge, Q2 and an elec ...
... Group Problem #11 Phys 112-1 F12 Page 1 of 4 Group problem #11: Capacitors, work and energy Two metal spheres are connected by a conducting wire. Sphere 1 has a radius, R1, a charge Q1, and an electric field strength at the surface of E1. Similarly Sphere 2 has a radius, R2, a charge, Q2 and an elec ...
Review Sheet and Study Hints - Tufts Institute of Cosmology
... Why do we need it? Visualization aids of the expanding universe. Is the universe finite or infinite (in what sense is it finite or infinite)? Does it have and edge, or a center? What does it expand into (why is this a wrong question)? ...
... Why do we need it? Visualization aids of the expanding universe. Is the universe finite or infinite (in what sense is it finite or infinite)? Does it have and edge, or a center? What does it expand into (why is this a wrong question)? ...
Which is it: Dark Matter or Modified Gravity?
... cluster dynamics are explained without detectable dark matter in the latetime universe. The predicted matter power spectrum can distinguish between MOG and ΛCDM. Galaxies do not possess a dark matter halo. • Before recombination and before the formation of the first stars and galaxies, the gravitati ...
... cluster dynamics are explained without detectable dark matter in the latetime universe. The predicted matter power spectrum can distinguish between MOG and ΛCDM. Galaxies do not possess a dark matter halo. • Before recombination and before the formation of the first stars and galaxies, the gravitati ...
Cosmic Hide and Seek: the Search for the Missing
... enough to overcome gravity. We still see the effects of that force when we see red-shifted galaxies. Clumping. One of the problems with the Big Bang theory is its failure to explain how stars and galaxies could form in a young universe that was evenly distributed in all directions. What started the ...
... enough to overcome gravity. We still see the effects of that force when we see red-shifted galaxies. Clumping. One of the problems with the Big Bang theory is its failure to explain how stars and galaxies could form in a young universe that was evenly distributed in all directions. What started the ...
Lesson 13 - Oregon State University
... short lifetimes, now extinct • Population II stars (H, He, 1% heavier elements) • Population I stars (H, He, 2-5% heavier elements) Includes our sun. ...
... short lifetimes, now extinct • Population II stars (H, He, 1% heavier elements) • Population I stars (H, He, 2-5% heavier elements) Includes our sun. ...
class 2, F10
... • The Earth’s axis is tilted 23.5° from being perpendicular to the ecliptic plane. • Therefore, the celestial equator is tilted 23.5° to the ecliptic. • As seen from Earth, the Sun spends 6 months north of the celestial equator and 6 months south of the celestial equator. • Seasons are caused by the ...
... • The Earth’s axis is tilted 23.5° from being perpendicular to the ecliptic plane. • Therefore, the celestial equator is tilted 23.5° to the ecliptic. • As seen from Earth, the Sun spends 6 months north of the celestial equator and 6 months south of the celestial equator. • Seasons are caused by the ...
THE UNIVERSE - - GRADE 9, UNIT 4 (4 weeks)
... Milky Way Galaxy. The journey must visit at least one star beyond our galaxy. Students create a visual display of information (e.g., poster, drawing, brochure, comic book) describing the journey they designed. The information should include the following claims: directions on how to get there (use r ...
... Milky Way Galaxy. The journey must visit at least one star beyond our galaxy. Students create a visual display of information (e.g., poster, drawing, brochure, comic book) describing the journey they designed. The information should include the following claims: directions on how to get there (use r ...
Introduction Contact Weak Lensing: Method The NOAO Deep Wide
... Observations of Supernovae have revealed that the expansion of the Universe is accelerating. Because dark matter decelerates the expansion, this points to a new component to the Universe —the Dark Energy. Experiments like the JDEM missions and LSST will use gravitational lensing as a tool to measure ...
... Observations of Supernovae have revealed that the expansion of the Universe is accelerating. Because dark matter decelerates the expansion, this points to a new component to the Universe —the Dark Energy. Experiments like the JDEM missions and LSST will use gravitational lensing as a tool to measure ...
Star - Uplift Education
... Calculation shows that the helium produced by nuclear fusion within stars cannot account for the real amount of helium in Universe (24%). In 1960 it was proposed that sometime during the early history of the Universe, long before any star, Universe was at a sufficiently high temperature to produce ...
... Calculation shows that the helium produced by nuclear fusion within stars cannot account for the real amount of helium in Universe (24%). In 1960 it was proposed that sometime during the early history of the Universe, long before any star, Universe was at a sufficiently high temperature to produce ...
Chapter 1 1. The parallax angle of Sirius is 0.377 ′′. Find the
... 10. When the HR diagram is constructed from observed data, part of the width of the main-sequence is due to errors in distance measurements. If a typical uncertainty in parallax is 10%, by how much (in magnitudes) will stars typically be displaced from their true positions on the HR diagram? p2.88 1 ...
... 10. When the HR diagram is constructed from observed data, part of the width of the main-sequence is due to errors in distance measurements. If a typical uncertainty in parallax is 10%, by how much (in magnitudes) will stars typically be displaced from their true positions on the HR diagram? p2.88 1 ...
The Universe Section 1
... – During convection, hot gas moves upward, away from the star’s center, and cooler gas sinks toward the center. – During radiation, atoms absorb energy and transfer it to other atoms in random directions. Atoms near the star’s surface radiate energy into space. ...
... – During convection, hot gas moves upward, away from the star’s center, and cooler gas sinks toward the center. – During radiation, atoms absorb energy and transfer it to other atoms in random directions. Atoms near the star’s surface radiate energy into space. ...
Science and Beauty Take up
... huge, 100 thousand light years across, rotates every 200 million years - lots more galaxies out there - maybe 100 billion in total centers of galaxies are violent, devour stars some centers very bright due to violence, can be seen 10 billion light years away galaxies are moving away from each other. ...
... huge, 100 thousand light years across, rotates every 200 million years - lots more galaxies out there - maybe 100 billion in total centers of galaxies are violent, devour stars some centers very bright due to violence, can be seen 10 billion light years away galaxies are moving away from each other. ...
General Astronomy Dark Matter
... • What of the next 22.5% of the critical density? • This cannot be made of normal matter, or it would have affected the formation of chemical elements in the Big Bang • So what can it be? Many suggestions have been made, including primordial black holes, massive neutrinos and a host of other exotic ...
... • What of the next 22.5% of the critical density? • This cannot be made of normal matter, or it would have affected the formation of chemical elements in the Big Bang • So what can it be? Many suggestions have been made, including primordial black holes, massive neutrinos and a host of other exotic ...
tutorial 2: answer
... 0 / 4 . If l 5C / m , compute E at (0,0, z ) and then evaluate it at: a) The origin. b) z = 5 cm c) z = -5cm ...
... 0 / 4 . If l 5C / m , compute E at (0,0, z ) and then evaluate it at: a) The origin. b) z = 5 cm c) z = -5cm ...
How Big is the Universe
... gravitational force depends on how much mass-the amount of matter in an object-the objects have and how far apart they are from each other. The greater an object’s mass, the greater the force of attraction; in addition, the greater the distance between objects, the smaller the force of attraction. ...
... gravitational force depends on how much mass-the amount of matter in an object-the objects have and how far apart they are from each other. The greater an object’s mass, the greater the force of attraction; in addition, the greater the distance between objects, the smaller the force of attraction. ...
Solutions to Homework #6, AST 203, Spring 2012
... Calculate each of the following, and compare with the values for the real Universe: a) You observe a galaxy with the hydrogen 656.3 nm line redshifted to a value of 926 nm. Calculate the redshift for this galaxy, and determine the distance to the galaxy in the “Alan” Universe and the real Universe. ...
... Calculate each of the following, and compare with the values for the real Universe: a) You observe a galaxy with the hydrogen 656.3 nm line redshifted to a value of 926 nm. Calculate the redshift for this galaxy, and determine the distance to the galaxy in the “Alan” Universe and the real Universe. ...
Astronomy - Marshall Public Schools
... and gas that clumped due to gravity about 4.6 billion years ago. 2. The 3 main things found on earth that allow life as we know it to exist are liquid water, moderate temperatures, breathable atmosphere. 3. I can compare the atmosphere, presence or lack of liquid water, and the temperature of ...
... and gas that clumped due to gravity about 4.6 billion years ago. 2. The 3 main things found on earth that allow life as we know it to exist are liquid water, moderate temperatures, breathable atmosphere. 3. I can compare the atmosphere, presence or lack of liquid water, and the temperature of ...
Astronomy (stars, galaxies and the Universe)
... All stars are created from the gases in a nebula When the contracting gas and dust from a nebula become so dense and hot that nuclear fusion begins, the protostar begins to shine When a star begins to run out of fuel, its core shrinks and its outer portion expands The evolutionary path of a star dep ...
... All stars are created from the gases in a nebula When the contracting gas and dust from a nebula become so dense and hot that nuclear fusion begins, the protostar begins to shine When a star begins to run out of fuel, its core shrinks and its outer portion expands The evolutionary path of a star dep ...
Cosmic Background Radiation
... when the universe was about 370 000 years old in the standard big-bang model. In such a standard framework, that imprint reflects ripples that arose from the early era, at about 10−30 s after the initial singularity in the big-bang model. It is commonly held that such ripples should give rise to the ...
... when the universe was about 370 000 years old in the standard big-bang model. In such a standard framework, that imprint reflects ripples that arose from the early era, at about 10−30 s after the initial singularity in the big-bang model. It is commonly held that such ripples should give rise to the ...
BIG BANG BALLOONS
... Introduction: In the 1920s, astronomer Edwin Hubble realized that light coming from galaxies is shifted into the longer, red wavelengths. This would indicate that they are moving away from Earth. By carefully observing the light from galaxies at different distances from Earth, he determined that the ...
... Introduction: In the 1920s, astronomer Edwin Hubble realized that light coming from galaxies is shifted into the longer, red wavelengths. This would indicate that they are moving away from Earth. By carefully observing the light from galaxies at different distances from Earth, he determined that the ...
powerpoint
... Clusters of Galaxies • In 20’s, Zwicky pointed out that the velocity dispersion of the Coma cluster is inconsistent with its self-gravity • One expects v2=GM/R, the mass inferred this way is 100 times larger than the inferred stellar mass ...
... Clusters of Galaxies • In 20’s, Zwicky pointed out that the velocity dispersion of the Coma cluster is inconsistent with its self-gravity • One expects v2=GM/R, the mass inferred this way is 100 times larger than the inferred stellar mass ...
Astronomy (stars, galaxies and the Universe)
... the matter and energy in the Universe was concentrated into single hot dense point called a singularity Tremendous amounts of heat and pressure made this point so unstable that it exploded ...
... the matter and energy in the Universe was concentrated into single hot dense point called a singularity Tremendous amounts of heat and pressure made this point so unstable that it exploded ...
Flatness problem
The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special' values, and that a small deviation from these values would have had massive effects on the nature of the universe at the current time.In the case of the flatness problem, the parameter which appears fine-tuned is the density of matter and energy in the universe. This value affects the curvature of space-time, with a very specific critical value being required for a flat universe. The current density of the universe is observed to be very close to this critical value. Since the total density departs rapidly from the critical value over cosmic time, the early universe must have had a density even closer to the critical density, departing from it by one part in 1062 or less. This leads cosmologists to question how the initial density came to be so closely fine-tuned to this 'special' value.The problem was first mentioned by Robert Dicke in 1969. The most commonly accepted solution among cosmologists is cosmic inflation, the idea that the universe went through a brief period of extremely rapid expansion in the first fraction of a second after the Big Bang; along with the monopole problem and the horizon problem, the flatness problem is one of the three primary motivations for inflationary theory.