History of the Universe and Solar System
... Is the Universe 20 BY old? No, gravitational forces have slowed down the galaxies since the Big Bang. (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. This is e ...
... Is the Universe 20 BY old? No, gravitational forces have slowed down the galaxies since the Big Bang. (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. This is e ...
Slide 1
... the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there were smaller clumps dense clouds ofFinally, gas and dust began had to more collapse gravity. under the weight about ...
... the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there were smaller clumps dense clouds ofFinally, gas and dust began had to more collapse gravity. under the weight about ...
SOLUTIONS TO PROBLEM SET # 4
... of matter at the time of primordial nucleosynthesis greater than or less than the density of the Earth’s air at sea level? According to the Wikipedia article “Density of Air”, dry air has a density ρair ≈ 1.2 kg/ m3 at sea level at a temperature T = 20◦ C = 68◦ F . (It becomes denser when cooler, an ...
... of matter at the time of primordial nucleosynthesis greater than or less than the density of the Earth’s air at sea level? According to the Wikipedia article “Density of Air”, dry air has a density ρair ≈ 1.2 kg/ m3 at sea level at a temperature T = 20◦ C = 68◦ F . (It becomes denser when cooler, an ...
Problem Set # 7: The Penultimate Problem Set Due Wednesday
... above some minimum threshold, Fmin . The flux of the Sun would be equal to Fmin if it were at a distance of 17 parsecs from us. In other words, the maximum distance at which you would be able to see the Sun with your naked eyes is rsun = 17 pc. The luminosity of a supernova (that is, an exploding st ...
... above some minimum threshold, Fmin . The flux of the Sun would be equal to Fmin if it were at a distance of 17 parsecs from us. In other words, the maximum distance at which you would be able to see the Sun with your naked eyes is rsun = 17 pc. The luminosity of a supernova (that is, an exploding st ...
Is space created and destroyed? 9 Feb 16 Feb 2012
... è Type I supernovae do not have hydrogen in the spectrum. Type II supernovae do have hydrogen. 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 ...
... è Type I supernovae do not have hydrogen in the spectrum. Type II supernovae do have hydrogen. 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 ...
The Big Bang
... Mysterious energy glow picked from a telescope in 1965. Turns out it was leftover thermal energy from the Big Bang. ...
... Mysterious energy glow picked from a telescope in 1965. Turns out it was leftover thermal energy from the Big Bang. ...
Chapter105.ppt
... • Planets are made from planetesimals; originally the rings of gas and dusk surrounding a protostar. The Moon formed when another celestial body collided with the Earth to create a massive cloud of dust and debris that coalesced to form the Moon. ...
... • Planets are made from planetesimals; originally the rings of gas and dusk surrounding a protostar. The Moon formed when another celestial body collided with the Earth to create a massive cloud of dust and debris that coalesced to form the Moon. ...
WINNING STORY - Atlantis Short Story Contest
... down on each other and being judgmental. We live in a world where the explosions are caused not by stars, but by wars waged by people who think the world is theirs and who disregard the others. We have to change that. Like the atom showed us, every one of us is a little piece of the puzzle, contribu ...
... down on each other and being judgmental. We live in a world where the explosions are caused not by stars, but by wars waged by people who think the world is theirs and who disregard the others. We have to change that. Like the atom showed us, every one of us is a little piece of the puzzle, contribu ...
Theories
... The Universe includes living things, planets, stars, galaxies, dust clouds, light, and even time. ...
... The Universe includes living things, planets, stars, galaxies, dust clouds, light, and even time. ...
Lecture 20, PPT version
... of each individual star decreases as (1/distance)2 BUT the number of stars at that distance increases as ...
... of each individual star decreases as (1/distance)2 BUT the number of stars at that distance increases as ...
Content Standards/Performance Indicators: Key Pre
... The Moon is our nearest neighbor in space and affects Earth in many ways Understanding the solar system helps you understand Earth’s position in space. The Sun is the star that provides energy for life on Earth. That Earth is part of the Milky Way galaxy. ...
... The Moon is our nearest neighbor in space and affects Earth in many ways Understanding the solar system helps you understand Earth’s position in space. The Sun is the star that provides energy for life on Earth. That Earth is part of the Milky Way galaxy. ...
Ordering_The_Universe
... includes the Local Group (A Cluster). Largest gravitational bound system so far. Ours=Virgo Super Cluster ...
... includes the Local Group (A Cluster). Largest gravitational bound system so far. Ours=Virgo Super Cluster ...
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 ...
Content Clarification for Modeling the Universe: Earth and Space
... principles. Unlike the sun, most stars are in systems of two or more stars orbiting around one another. • On the basis of scientific evidence, the universe is estimated to be over ten billion years old. The current theory is that its entire contents expanded explosively from a hot, dense, chaotic ma ...
... principles. Unlike the sun, most stars are in systems of two or more stars orbiting around one another. • On the basis of scientific evidence, the universe is estimated to be over ten billion years old. The current theory is that its entire contents expanded explosively from a hot, dense, chaotic ma ...
Intro to Earth science
... • Earth is the 3rd planet from the Sun in our SOLAR SYSTEM • Approximately 100 billion stars in our galaxy ...
... • Earth is the 3rd planet from the Sun in our SOLAR SYSTEM • Approximately 100 billion stars in our galaxy ...
Origin of the Universe
... Over the thousands of years of human thhking, various cultures have produced a multitude of theories concerning the origin, evolution, and structure of the universe. Universe means everything that exists in any place-all the space, matter, and energy in existence. The majority of scientists today th ...
... Over the thousands of years of human thhking, various cultures have produced a multitude of theories concerning the origin, evolution, and structure of the universe. Universe means everything that exists in any place-all the space, matter, and energy in existence. The majority of scientists today th ...
Chapter 2 Basic Chemistry
... • A contracting universe could collapse back to a single point in what is called the Big Crunch. As things come closer to each other, galaxies and stars would collide. The universe would become extremely hot and very small. At this point, the universe may end, or another Big Bang could start the cyc ...
... • A contracting universe could collapse back to a single point in what is called the Big Crunch. As things come closer to each other, galaxies and stars would collide. The universe would become extremely hot and very small. At this point, the universe may end, or another Big Bang could start the cyc ...
Star Groups and Big Bang Power Point
... The Expanding Universe Using Hubble’s observations, astronomers have been able to determine that the universe is expanding. The expanding universe can be thought of as a raisin cake rising in the oven. If you were able to sit on one raisin, you would see all the other raisins moving away from y ...
... The Expanding Universe Using Hubble’s observations, astronomers have been able to determine that the universe is expanding. The expanding universe can be thought of as a raisin cake rising in the oven. If you were able to sit on one raisin, you would see all the other raisins moving away from y ...
Lecture082602 - Florida State University
... The Universe is isotropic – it looks the same in all directions The Universe is homogeneous – any large volume looks the same as any other large volume at the same distance ...
... The Universe is isotropic – it looks the same in all directions The Universe is homogeneous – any large volume looks the same as any other large volume at the same distance ...
universe
... see into theMilky past simply by looking far away. • Speed of light ( Well known from experiments here on Earth) • Distance of objects ( Far more difficult) Some galaxies look much smaller and fainter than others, showing they may be much further away. The Andromeda galaxy is 2.3 million light years ...
... see into theMilky past simply by looking far away. • Speed of light ( Well known from experiments here on Earth) • Distance of objects ( Far more difficult) Some galaxies look much smaller and fainter than others, showing they may be much further away. The Andromeda galaxy is 2.3 million light years ...
ISP 205: Visions of the Universe
... • We see objects as they were in the past: • Light travels at a finite speed (300,000 km/s). • The farther away we look in distance, the further back we look in time. • Allows us to study the history of the Universe. ...
... • We see objects as they were in the past: • Light travels at a finite speed (300,000 km/s). • The farther away we look in distance, the further back we look in time. • Allows us to study the history of the Universe. ...
Chapter 14 Origins
... are telling you that the Earth is at the centre of the universe and everything revolves around us. Would you believe that? Explain why or why not. ...
... are telling you that the Earth is at the centre of the universe and everything revolves around us. Would you believe that? Explain why or why not. ...
Universe
The Universe is all of time and space and its contents. The Universe includes planets, stars, galaxies, the contents of intergalactic space, the smallest subatomic particles, and all matter and energy. The observable universe is about 28 billion parsecs (91 billion light-years) in diameter at the present time. The size of the whole Universe is not known and may be infinite. Observations and the development of physical theories have led to inferences about the composition and evolution of the Universe.Throughout recorded history, cosmologies and cosmogonies, including scientific models, have been proposed to explain observations of the Universe. The earliest quantitative geocentric models were developed by ancient Greek philosophers and Indian philosophers. Over the centuries, more precise astronomical observations led to Nicolaus Copernicus's heliocentric model of the Solar System and Johannes Kepler's improvement on that model with elliptical orbits, which was eventually explained by Isaac Newton's theory of gravity. Further observational improvements led to the realization that the Solar System is located in a galaxy composed of billions of stars, the Milky Way. It was subsequently discovered that our galaxy is just one of many. On the largest scales, it is assumed that the distribution of galaxies is uniform and the same in all directions, meaning that the Universe has neither an edge nor a center. Observations of the distribution of these galaxies and their spectral lines have led to many of the theories of modern physical cosmology. The discovery in the early 20th century that galaxies are systematically redshifted suggested that the Universe is expanding, and the discovery of the cosmic microwave background radiation suggested that the Universe had a beginning. Finally, observations in the late 1990s indicated the rate of the expansion of the Universe is increasing indicating that the majority of energy is most likely in an unknown form called dark energy. The majority of mass in the universe also appears to exist in an unknown form, called dark matter.The Big Bang theory is the prevailing cosmological model describing the development of the Universe. Space and time were created in the Big Bang, and these were imbued with a fixed amount of energy and matter; as space expands, the density of that matter and energy decreases. After the initial expansion, the Universe cooled sufficiently to allow the formation first of subatomic particles and later of simple atoms. Giant clouds of these primordial elements later coalesced through gravity to form stars. Assuming that the prevailing model is correct, the age of the Universe is measured to be 7001137990000000000♠13.799±0.021 billion years.There are many competing hypotheses about the ultimate fate of the Universe. Physicists and philosophers remain unsure about what, if anything, preceded the Big Bang. Many refuse to speculate, doubting that any information from any such prior state could ever be accessible. There are various multiverse hypotheses, in which some physicists have suggested that the Universe might be one among many universes that likewise exist.