In 1929, the astronomer Edwin Hubble observed that the light from
... The observations made by Hubble support the idea that the Universe is expanding. This means that galaxies are continually moving away from each other and from the Earth. Figure 2 shows a student using a balloon to model the idea of an expanding Universe. Some dots, which represent galaxies, were ma ...
... The observations made by Hubble support the idea that the Universe is expanding. This means that galaxies are continually moving away from each other and from the Earth. Figure 2 shows a student using a balloon to model the idea of an expanding Universe. Some dots, which represent galaxies, were ma ...
Why Study Cosmic Near Infrared Background? (1-4um)
... • an intense starbust for a few million years (M/L~0.001), • a moderate burst for a few hundred million years (M/L~0.1-1), or • a normal star formation (M/L~10). ...
... • an intense starbust for a few million years (M/L~0.001), • a moderate burst for a few hundred million years (M/L~0.1-1), or • a normal star formation (M/L~10). ...
Grand Tour Worksheet - School District of La Crosse
... 7. The astronomer is able to observe stuff in space which can be reproduced on earth, give an example ...
... 7. The astronomer is able to observe stuff in space which can be reproduced on earth, give an example ...
70 Thousand Million, Million, Million Stars in Space
... A comet is not a star. It is formed by bits of dust and gas that collect into an icy form. Comets take their name from the Greek aster kometes, which means “long-haired stars.” Comets have come as close to Earth as 31,068,560 miles (50 million km). Asteroids are not stars. They are bits of rock that ...
... A comet is not a star. It is formed by bits of dust and gas that collect into an icy form. Comets take their name from the Greek aster kometes, which means “long-haired stars.” Comets have come as close to Earth as 31,068,560 miles (50 million km). Asteroids are not stars. They are bits of rock that ...
z= 1000 - z= 10
... Universe is flat (total density = critical density) Atoms 4% Dark Matter 23% Dark Energy (cosmological constant?) 72% Universe has tiny ripples ...
... Universe is flat (total density = critical density) Atoms 4% Dark Matter 23% Dark Energy (cosmological constant?) 72% Universe has tiny ripples ...
pptx
... the gas forming the young star heats up as the star contracts the increased pressure causes jets of gas to be emitted from the poles of the young star conversion of gravitational energy to ...
... the gas forming the young star heats up as the star contracts the increased pressure causes jets of gas to be emitted from the poles of the young star conversion of gravitational energy to ...
The Kunlun Infrared Sky Survey
... Vacuum energy density responsible and acceleration of the Universe used SN standard candle at optical wavelengths (Perlmutter et al. 1999, Riess et al. 1998) ...
... Vacuum energy density responsible and acceleration of the Universe used SN standard candle at optical wavelengths (Perlmutter et al. 1999, Riess et al. 1998) ...
Final review - Physics and Astronomy
... galaxies, know luminosity. In distant galaxies, determine apparent brightness. Thus determine distance. Works for more than 3000 Mpc. From redshifts, they are not expanding as quickly from each other as galaxies are now. ...
... galaxies, know luminosity. In distant galaxies, determine apparent brightness. Thus determine distance. Works for more than 3000 Mpc. From redshifts, they are not expanding as quickly from each other as galaxies are now. ...
File - Flipped Out Science with Mrs. Thomas!
... beginning, but that fact creates more questions than answers. For instance, if nothing existed prior to the Big Bang, what caused the singularity to be created in the first place? ...
... beginning, but that fact creates more questions than answers. For instance, if nothing existed prior to the Big Bang, what caused the singularity to be created in the first place? ...
inaugural091112
... What is the mysterious dark matter and dark energy? What are they and why are they necessary? ...
... What is the mysterious dark matter and dark energy? What are they and why are they necessary? ...
study guide
... • Energy of a photon • Know the relative wavelengths of light in the spectrum • What causes an emission or absorption li iin a spectrum? ...
... • Energy of a photon • Know the relative wavelengths of light in the spectrum • What causes an emission or absorption li iin a spectrum? ...
The Origin of the Elements - Indiana University Astronomy
... Hydrogen and helium were created during the Big Bang while the Universe was cooling from its initial hot, dense state. About 10% of the lithium in the Universe today was also created in the Big Bang. We’re still not sure where the rest comes from. The first stars formed from this material. ...
... Hydrogen and helium were created during the Big Bang while the Universe was cooling from its initial hot, dense state. About 10% of the lithium in the Universe today was also created in the Big Bang. We’re still not sure where the rest comes from. The first stars formed from this material. ...
the curious incident of the dog in the night-time
... black hole is what is called a singularity, which means it is impossible to find out what is on the other side because the gravity of a black hole is so big that even electromagnetic waves like light can’t get out of it, and electromagnetic waves are how we get information about things which are far ...
... black hole is what is called a singularity, which means it is impossible to find out what is on the other side because the gravity of a black hole is so big that even electromagnetic waves like light can’t get out of it, and electromagnetic waves are how we get information about things which are far ...
Introduction to Galaxies and Cosmology Exercises 2
... Also, some problems relating to active galactic nuclei and galaxy clusters are included. We will also work with the theoretical framework of cosmology, the Friedmann-Lemaı̂tre-Robinson-Walker equations and learn how to use them to relate observational quantities to the theory. The exercises will tou ...
... Also, some problems relating to active galactic nuclei and galaxy clusters are included. We will also work with the theoretical framework of cosmology, the Friedmann-Lemaı̂tre-Robinson-Walker equations and learn how to use them to relate observational quantities to the theory. The exercises will tou ...
Volcanoes and Igneous Activity Earth
... 25.3 The Universe The Big Bang The Big Crunch? • The future of the universe follows two possible paths: 1. The universe will expand forever. 2. The outward expansion will stop and gravitational contraction will follow. • The view currently favored by most scientists is an expanding universe with ...
... 25.3 The Universe The Big Bang The Big Crunch? • The future of the universe follows two possible paths: 1. The universe will expand forever. 2. The outward expansion will stop and gravitational contraction will follow. • The view currently favored by most scientists is an expanding universe with ...
Star and Galaxies
... 25.3 The Universe The Big Bang The Big Crunch? • The future of the universe follows two possible paths: 1. The universe will expand forever. 2. The outward expansion will stop and gravitational contraction will follow. • The view currently favored by most scientists is an expanding universe with ...
... 25.3 The Universe The Big Bang The Big Crunch? • The future of the universe follows two possible paths: 1. The universe will expand forever. 2. The outward expansion will stop and gravitational contraction will follow. • The view currently favored by most scientists is an expanding universe with ...
Age Estimates of Globular Clusters in the Milky Way
... would have taken longer to achieve this separation since the Big Bang than they otherwise would have. However, as more careful examinations of uncertainties associated with stellar evolution were performed, as well as refined estimates of the parameters that govern stellar evolution, the lower limit ...
... would have taken longer to achieve this separation since the Big Bang than they otherwise would have. However, as more careful examinations of uncertainties associated with stellar evolution were performed, as well as refined estimates of the parameters that govern stellar evolution, the lower limit ...
binary star
... 25.3 The Universe The Big Bang The Big Crunch? • The future of the universe follows two possible paths: 1. The universe will expand forever. 2. The outward expansion will stop and gravitational contraction will follow. • The view currently favored by most scientists is an expanding universe with ...
... 25.3 The Universe The Big Bang The Big Crunch? • The future of the universe follows two possible paths: 1. The universe will expand forever. 2. The outward expansion will stop and gravitational contraction will follow. • The view currently favored by most scientists is an expanding universe with ...
Scientific Method, Numbers, Distances
... Announcements • Class is now active on ICON. • The first homework is available on ICON. It is due at noon on Wednesday, Jan 28. • We will do i-Clicker registration now and before/after next few classes. ...
... Announcements • Class is now active on ICON. • The first homework is available on ICON. It is due at noon on Wednesday, Jan 28. • We will do i-Clicker registration now and before/after next few classes. ...
Dark Matter: Observational Constraints Properties of Dark Matter:
... in hydrostatic equilibrium, central regions would be dense enough to be easily observed. • Molecular gas must be H2; large quantities would be ionized and observed near the galactic plane; in absorption against background quasars. If warm, would cool through quadrupole emission and be visible. ...
... in hydrostatic equilibrium, central regions would be dense enough to be easily observed. • Molecular gas must be H2; large quantities would be ionized and observed near the galactic plane; in absorption against background quasars. If warm, would cool through quadrupole emission and be visible. ...
Dark Matter— More Than Meets The Eye
... One possibility is that all dark matter is baryonic; that is, made of protons and neutrons—MACHOs! Dark matter may be dwarf stars too dim to be observed. Or they could be cold planet-like objects with masses about 1/1000 that of the sun. Or maxi- or mini- black holes. Or massive cold gas clouds. All ...
... One possibility is that all dark matter is baryonic; that is, made of protons and neutrons—MACHOs! Dark matter may be dwarf stars too dim to be observed. Or they could be cold planet-like objects with masses about 1/1000 that of the sun. Or maxi- or mini- black holes. Or massive cold gas clouds. All ...
AST301.Ch21.StellarExpl - University of Texas Astronomy
... First way to get a supernova: core collapse. Massive stars burn nuclear fuels up to iron (Fe). But nuclear fusion of iron does not produce energy, it uses energy. This leads to loss of pressure support core collapse Temp. is so large (~10 billion K) that the gamma ray photons (Wien’s law) have h ...
... First way to get a supernova: core collapse. Massive stars burn nuclear fuels up to iron (Fe). But nuclear fusion of iron does not produce energy, it uses energy. This leads to loss of pressure support core collapse Temp. is so large (~10 billion K) that the gamma ray photons (Wien’s law) have h ...
Hubble`s Law is the relation between the recession velocity of a
... From Hubble's Law, we know the Hubble constant is just velocity divided by distance. Thus the reciprocal of Hubble constant (1/H) must be proportional to the age of the universe. (In other words, if you know the velocity and the distance of a far away galaxy, you can figure out how long ago our gala ...
... From Hubble's Law, we know the Hubble constant is just velocity divided by distance. Thus the reciprocal of Hubble constant (1/H) must be proportional to the age of the universe. (In other words, if you know the velocity and the distance of a far away galaxy, you can figure out how long ago our gala ...
An Ancient Universe
... universe (as we will describe in a moment), they did not hope or wish for it to have a particular age, and try to make their results come out according to those wishes. Instead, they did the best they could to understand the evidence nature provides and then reported what their observations had told ...
... universe (as we will describe in a moment), they did not hope or wish for it to have a particular age, and try to make their results come out according to those wishes. Instead, they did the best they could to understand the evidence nature provides and then reported what their observations had told ...
Physical cosmology
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate. For most of human history, it was a branch of metaphysics and religion. Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed us to understand those physical laws.Physical cosmology, as it is now understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the universe contains a huge number of external galaxies beyond our own Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding. These advances made it possible to speculate about the origin of the universe, and allowed the establishment of the Big Bang Theory, by Georges Lemaitre, as the leading cosmological model. A few researchers still advocate a handful of alternative cosmologies; however, most cosmologists agree that the Big Bang theory explains the observations better.Dramatic advances in observational cosmology since the 1990s, including the cosmic microwave background, distant supernovae and galaxy redshift surveys, have led to the development of a standard model of cosmology. This model requires the universe to contain large amounts of dark matter and dark energy whose nature is currently not well understood, but the model gives detailed predictions that are in excellent agreement with many diverse observations.Cosmology draws heavily on the work of many disparate areas of research in theoretical and applied physics. Areas relevant to cosmology include particle physics experiments and theory, theoretical and observational astrophysics, general relativity, quantum mechanics, and plasma physics.