Astrophysics E1. This question is about stars.
... E2. This question is about cosmology. (a) The diagram below represents a spherical region of space based on Newton’s model of the universe. Earth is at the centre of the region. The dark line represents a very thin spherical shell of space distance R from Earth. With reference to the diagram and New ...
... E2. This question is about cosmology. (a) The diagram below represents a spherical region of space based on Newton’s model of the universe. Earth is at the centre of the region. The dark line represents a very thin spherical shell of space distance R from Earth. With reference to the diagram and New ...
Dark Energy and Dark Matter - Appalachian State University
... • Not enough data to prove anything yet ...
... • Not enough data to prove anything yet ...
Document
... We belong to the Milky Way galaxy – spiral galaxy – 100,000 light years wide – 16,000 light years thick at the centre – has three distinct spiral arms - Sun is positioned in one of these arms about two-thirds of the way from the galactic center, at a distance of about 30,000 lightyears The Andro ...
... We belong to the Milky Way galaxy – spiral galaxy – 100,000 light years wide – 16,000 light years thick at the centre – has three distinct spiral arms - Sun is positioned in one of these arms about two-thirds of the way from the galactic center, at a distance of about 30,000 lightyears The Andro ...
Print article and do activities on paper
... drawing by William Blake, the romantic poet and artist. Blake wanted to show the limits of science, that it could never understand the beauty and strangeness of nature. The sculpture shows a man crouching down to draw a right-angle on the ground or to measure something he can’t see. Maybe he’s tryin ...
... drawing by William Blake, the romantic poet and artist. Blake wanted to show the limits of science, that it could never understand the beauty and strangeness of nature. The sculpture shows a man crouching down to draw a right-angle on the ground or to measure something he can’t see. Maybe he’s tryin ...
General Relativity and the Accelerated Expansion of the Universe
... produce a static universe. Astronomers, those days, believed that stars and nebulae do not exhibit any largescale ordered motion. The prevalent view in the past was that the universe on large scales is static. GR, being a theory of attractive gravity, predicted that a large mass (like our universe) ...
... produce a static universe. Astronomers, those days, believed that stars and nebulae do not exhibit any largescale ordered motion. The prevalent view in the past was that the universe on large scales is static. GR, being a theory of attractive gravity, predicted that a large mass (like our universe) ...
1E6_Tutorial 5
... capacitor connected in series (b) A 100 F capacitor is connected in series with a 8 k resistor. Determine (i) time constant of the circuit If the combination is connected to a 100 V supply, find (ii) the initial rate of rise of voltage across the capacitor, (iii) the initial charging current, (iv) ...
... capacitor connected in series (b) A 100 F capacitor is connected in series with a 8 k resistor. Determine (i) time constant of the circuit If the combination is connected to a 100 V supply, find (ii) the initial rate of rise of voltage across the capacitor, (iii) the initial charging current, (iv) ...
ASTRONOMY 5
... In words, over a period t, a physical system is potentially allowed to fluctuate in mass by an amount m. 3) Let’s apply this to the horizon mass today to calculate the time over which it could fluctuate by an amount equal to itself. That would be a very big fluctuation. The horizon mass today is a ...
... In words, over a period t, a physical system is potentially allowed to fluctuate in mass by an amount m. 3) Let’s apply this to the horizon mass today to calculate the time over which it could fluctuate by an amount equal to itself. That would be a very big fluctuation. The horizon mass today is a ...
Word
... Expansion of the Universe Evidence for the expansion of the Universe from a hot dense initial state comes from: 1. observations of the cosmic microwave background radiation, showing that the Universe has cooled as it expanded, 2. observations of the speed of recession of galaxies, from red-shifts of ...
... Expansion of the Universe Evidence for the expansion of the Universe from a hot dense initial state comes from: 1. observations of the cosmic microwave background radiation, showing that the Universe has cooled as it expanded, 2. observations of the speed of recession of galaxies, from red-shifts of ...
Cosmic Objects – Cosmology – Study Guide
... 11. Where do we find GRBs? Deep Space (across the entire sky) 12. When were GRBs first seen? 1960’s (Compton Gamma Ray Observer) 13. Why can’t we study GRBs on Earth? Atmosphere blocks Gamma Rays What is the Universe? (Reading) 14. Name and describe the three shapes of the universe. Flat – infinite; ...
... 11. Where do we find GRBs? Deep Space (across the entire sky) 12. When were GRBs first seen? 1960’s (Compton Gamma Ray Observer) 13. Why can’t we study GRBs on Earth? Atmosphere blocks Gamma Rays What is the Universe? (Reading) 14. Name and describe the three shapes of the universe. Flat – infinite; ...
Natural Explanation for the Anthropic Coincidences
... elements heavier than lithium require cooking in stars and thus a universe old enough for star evolution. The N1 = N2 coincidence would still hold in this case. Only hydrogen, helium, and lithium were synthesized in the early big bang. These are probably chemically too simple to be assembled into di ...
... elements heavier than lithium require cooking in stars and thus a universe old enough for star evolution. The N1 = N2 coincidence would still hold in this case. Only hydrogen, helium, and lithium were synthesized in the early big bang. These are probably chemically too simple to be assembled into di ...
astronomy webquest…… explore the universe
... Our star orbits the centre of our galaxy about once every ________________ years. A teaspoon of material from a neuron star can weigh about _____________________. Stars are made mainly from the gases _____________ and ______________. Describe the stages of a star’s life cycle in the correct order. ...
... Our star orbits the centre of our galaxy about once every ________________ years. A teaspoon of material from a neuron star can weigh about _____________________. Stars are made mainly from the gases _____________ and ______________. Describe the stages of a star’s life cycle in the correct order. ...
Notes - SFA Physics and Astronomy
... Other forces can affect the size and exact timing of the tides. Most notable here are friction of the water with the ocean bottom and the shape of the continents. Since ocean tides are obviously present, Earth must also experience atmospheric and crustal tides. The tides of the atmosphere are larger ...
... Other forces can affect the size and exact timing of the tides. Most notable here are friction of the water with the ocean bottom and the shape of the continents. Since ocean tides are obviously present, Earth must also experience atmospheric and crustal tides. The tides of the atmosphere are larger ...
Excerpt from Aristotle`s “On the Heavens”
... circular orbit revolves in stately measure with all the heavenly bodies unceasingly for ever. The whole heaven and universe being spherical and moving, as I have said, continually, there must of necessity be two points which do not move, exactly opposite to one another (as in a sphere being turned o ...
... circular orbit revolves in stately measure with all the heavenly bodies unceasingly for ever. The whole heaven and universe being spherical and moving, as I have said, continually, there must of necessity be two points which do not move, exactly opposite to one another (as in a sphere being turned o ...
Looking back in time to the big bang theory activity
... There are opportunities for independent, pair and group work with both of these tasks, as well as links to ICT, English skills, and presentation skills. You can also link this work to how science works. The redshift analysis task gives learners an opportunity to relate what they have learned to a re ...
... There are opportunities for independent, pair and group work with both of these tasks, as well as links to ICT, English skills, and presentation skills. You can also link this work to how science works. The redshift analysis task gives learners an opportunity to relate what they have learned to a re ...
Document
... So all objects are moving away from us Are we at the center of the universe? Raisin bread model Hubble constant - rate of recession/distance The further away galaxies are, the faster they are receding – This means the universe is expanding exponentially! ...
... So all objects are moving away from us Are we at the center of the universe? Raisin bread model Hubble constant - rate of recession/distance The further away galaxies are, the faster they are receding – This means the universe is expanding exponentially! ...
1 light year = 9 x 10 12 km
... – 8 minutes to reach us from the Sun – 8 years to reach us from Sirius (8 light-years away) – 1,500 years to reach us from the Orion Nebula ...
... – 8 minutes to reach us from the Sun – 8 years to reach us from Sirius (8 light-years away) – 1,500 years to reach us from the Orion Nebula ...
ppt document
... In trying to get rid of noise in a radio detector, a couple of scientists pointed the detector up at space thinking that there would be no radiation coming from there. They kept getting some signal, though. When word got around to some scientists working on the Big Bang theory, they said that this r ...
... In trying to get rid of noise in a radio detector, a couple of scientists pointed the detector up at space thinking that there would be no radiation coming from there. They kept getting some signal, though. When word got around to some scientists working on the Big Bang theory, they said that this r ...
TIME ASYMMETRY IN ELECTRODYNAMICS AND COSMOLOGY
... charge we notice that it loses energy. Thus the energy flow from the charge can be used to fix a chronological order. In cosmology the expansion of the universe enables us to do the same. If we photograph two nebulae at instants ...
... charge we notice that it loses energy. Thus the energy flow from the charge can be used to fix a chronological order. In cosmology the expansion of the universe enables us to do the same. If we photograph two nebulae at instants ...
department of physics - Bishopston Comprehensive School Moodle
... Now we’ve just discussed the Doppler effect using sound waves, but the Doppler effect applies to ALL waves not just sound waves. So for example if we looked at stars from a distant galaxy and the light wave received on earth was slightly stretched, then that would mean that the galaxy must be moving ...
... Now we’ve just discussed the Doppler effect using sound waves, but the Doppler effect applies to ALL waves not just sound waves. So for example if we looked at stars from a distant galaxy and the light wave received on earth was slightly stretched, then that would mean that the galaxy must be moving ...
dark - The Institute of Mathematical Sciences
... If you know the approximate masses of the planets, you can do better than that. Each planet's orbit and mass allow you to calculate the mass of the object the planet is orbiting. You will ger roughly the same mass for all of the planets. So you can conclude that the object the planets are orbiting m ...
... If you know the approximate masses of the planets, you can do better than that. Each planet's orbit and mass allow you to calculate the mass of the object the planet is orbiting. You will ger roughly the same mass for all of the planets. So you can conclude that the object the planets are orbiting m ...
universe - Global Change
... home to a variety of exotic objects. For example, quasars, which were first discovered in 1960, are still baffling objects. Incredibly energetic, they are found at great distances near what is thought to be the edge of the known universe (the most distant one has been estimated to be 10 billion ligh ...
... home to a variety of exotic objects. For example, quasars, which were first discovered in 1960, are still baffling objects. Incredibly energetic, they are found at great distances near what is thought to be the edge of the known universe (the most distant one has been estimated to be 10 billion ligh ...
EXERCISES: Set 4 of 4 Q1: (You will need a ruler and a calculator
... possible to measure the equivalent width of line (3) accurately? (c) Assuming that lines (1) and (2) are Lyα lines, deduce the corresponding column densities of neutral hydrogen, N (H i), if it is possible to do so. If it is not possible to do so, state what additional information you require. How w ...
... possible to measure the equivalent width of line (3) accurately? (c) Assuming that lines (1) and (2) are Lyα lines, deduce the corresponding column densities of neutral hydrogen, N (H i), if it is possible to do so. If it is not possible to do so, state what additional information you require. How w ...
Matter and Atoms
... What is a natural resource? Matter on Earth, living and non-living, that has value to humans in some way. What is the difference between a renewable and nonrenewable resource? Give an example of each. Renewable – replaced within a human life time EX – wildlife, water, soil, wind Nonrenewable – canno ...
... What is a natural resource? Matter on Earth, living and non-living, that has value to humans in some way. What is the difference between a renewable and nonrenewable resource? Give an example of each. Renewable – replaced within a human life time EX – wildlife, water, soil, wind Nonrenewable – canno ...
ps700-coll1-hayden
... seemed to evolve at an accelerating rate and said that with encoding, metabolism and reproduction, you have life (actual biological life). He also said that there are different types of “life” some listed below; ...
... seemed to evolve at an accelerating rate and said that with encoding, metabolism and reproduction, you have life (actual biological life). He also said that there are different types of “life” some listed below; ...
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.