Activity 2 The Signature of the Stars
... Figure 6 Cosmologists use a parameter called z to indicate redshift. The higher the value of z, the higher the redshift. ...
... Figure 6 Cosmologists use a parameter called z to indicate redshift. The higher the value of z, the higher the redshift. ...
3A8d
... An underlying theme throughout the course was the comparison of observed properties of galaxies with expectations from the current ΛCDM hierarchical model, which integrates a picture for the growth of galaxies with the buildup of the large scale structure of the Universe itself. (a) Describe, in rou ...
... An underlying theme throughout the course was the comparison of observed properties of galaxies with expectations from the current ΛCDM hierarchical model, which integrates a picture for the growth of galaxies with the buildup of the large scale structure of the Universe itself. (a) Describe, in rou ...
Ch 20 Notes Stars
... • When a scientist observes a galaxy that is 1 billion years away, they are observing light that left the galaxy 1 billion years ago • Scientists don’t know what the galaxy looks like now, but can study similar closer galaxies to piece together the evolution of galaxies • The gas, dust and stars tha ...
... • When a scientist observes a galaxy that is 1 billion years away, they are observing light that left the galaxy 1 billion years ago • Scientists don’t know what the galaxy looks like now, but can study similar closer galaxies to piece together the evolution of galaxies • The gas, dust and stars tha ...
AST101_lect_25
... universe is not infinite in space universe is not infinite in time universe is infinite, but evolves – It may not be in equilibrium – It may not have had stars in the past ...
... universe is not infinite in space universe is not infinite in time universe is infinite, but evolves – It may not be in equilibrium – It may not have had stars in the past ...
AST101 Lecture 25 Why is the Night Sky Dark?
... universe is not infinite in space universe is not infinite in time universe is infinite, but evolves – It may not be in equilibrium – It may not have had stars in the past ...
... universe is not infinite in space universe is not infinite in time universe is infinite, but evolves – It may not be in equilibrium – It may not have had stars in the past ...
Scale and Structure of the Universe
... •Which one contains our solar system? •How big is our galaxy? •What is a supercluster? •Which one contains our galaxy? •How big is our supercluster? •What is a filament structure? •How big is the known universe? ...
... •Which one contains our solar system? •How big is our galaxy? •What is a supercluster? •Which one contains our galaxy? •How big is our supercluster? •What is a filament structure? •How big is the known universe? ...
7th Grade Astronomy Study Guide
... ____ 36. According to the big bang theory, the universe is about a. 4.7 billion years old. c. 470 billion years old. b. 13.7 billion years old. d. 500 billion years old. ____ 37. Scientists think that the Milky Way probably is a. an irregular galaxy. c. an elliptical galaxy. b. a spiral galaxy. d. a ...
... ____ 36. According to the big bang theory, the universe is about a. 4.7 billion years old. c. 470 billion years old. b. 13.7 billion years old. d. 500 billion years old. ____ 37. Scientists think that the Milky Way probably is a. an irregular galaxy. c. an elliptical galaxy. b. a spiral galaxy. d. a ...
doc - IAC
... Massive stars are much heavier than the Sun. They can be up to 10 or 100 times more massive. They stand out because of their high luminosity. These stars can become a million times brighter than the Sun. Their masses can be measured dynamically, in the same way as planetary masses are measured. The ...
... Massive stars are much heavier than the Sun. They can be up to 10 or 100 times more massive. They stand out because of their high luminosity. These stars can become a million times brighter than the Sun. Their masses can be measured dynamically, in the same way as planetary masses are measured. The ...
WHERE DO ELEMENTS COME FROM?
... predicts the universe would produce 25% helium and 75% hydrogen in the first few minutes of creation. Nothing else. • These are stable – these proportions remain today. • Observations show the universe is now about 24% He, 74% H, 2% everything else • What about “everything else? ...
... predicts the universe would produce 25% helium and 75% hydrogen in the first few minutes of creation. Nothing else. • These are stable – these proportions remain today. • Observations show the universe is now about 24% He, 74% H, 2% everything else • What about “everything else? ...
E:\2012-2013\SSU\PHS 207spring 2013\3rd test 4
... stars much older than 10 billion years and that others are 2nd and 3rd generation stars that could NOT have developed in just 10 billion years ...
... stars much older than 10 billion years and that others are 2nd and 3rd generation stars that could NOT have developed in just 10 billion years ...
TheExpansionoftheUniverse
... tired-light theory- this theory suggests that lost energy disappears from the universe completely-even tho it goes against the First Law of Thermodynamics; Paul LaViolette was one of the first people to disprove the expanding universe theory some of his work suggested cosmological red shift- which w ...
... tired-light theory- this theory suggests that lost energy disappears from the universe completely-even tho it goes against the First Law of Thermodynamics; Paul LaViolette was one of the first people to disprove the expanding universe theory some of his work suggested cosmological red shift- which w ...
Active Galactic Nuclei
... According to the Hubble Law, the space between the galaxies is constantly increasing, with Velocity = H0 D istance ...
... According to the Hubble Law, the space between the galaxies is constantly increasing, with Velocity = H0 D istance ...
Where do we come from?
... t=0: The Big Bang How do we know that this happened? Universe was denser in the past; if we daringly extrapolate backward to infinite density, that was a finite time ago. ...
... t=0: The Big Bang How do we know that this happened? Universe was denser in the past; if we daringly extrapolate backward to infinite density, that was a finite time ago. ...
Stars - Robert M. Hazen
... How Far Away Are Galaxies? • Parallax • Standard candles – Cepheid variable stars – Large galaxies – Type 1 supernovae ...
... How Far Away Are Galaxies? • Parallax • Standard candles – Cepheid variable stars – Large galaxies – Type 1 supernovae ...
Beyond our Sol. System
... The Big Bang Theory – theory on how the entire Universe formed. Estimated between 10 and 20 billion years ago. The Universe was once confined to a point of matter that was very massive, very dense, and very hot. This is before space and time existed. It is believed that there was an explosion so bi ...
... The Big Bang Theory – theory on how the entire Universe formed. Estimated between 10 and 20 billion years ago. The Universe was once confined to a point of matter that was very massive, very dense, and very hot. This is before space and time existed. It is believed that there was an explosion so bi ...
Lecture 12
... The relationship between redshift and distance is linear for low values of z, but becomes rather complex when we look at very distant objects (very far back in time). As the Universe expands the value of H0 changes as the geometry of the Universe changes. Partly this is a ‘standard’ result from appl ...
... The relationship between redshift and distance is linear for low values of z, but becomes rather complex when we look at very distant objects (very far back in time). As the Universe expands the value of H0 changes as the geometry of the Universe changes. Partly this is a ‘standard’ result from appl ...
Take Home #1 Complete the following on your own paper. Do not
... C. Scientists work individually and do not usually interact with each other. D. Scientists each have jobs where they study completely different areas of science. 17) A Belgian priest, Georges Lamaître, was the first to develop a “big bang” theory. In 1927, after studying red shifts of galaxies, he p ...
... C. Scientists work individually and do not usually interact with each other. D. Scientists each have jobs where they study completely different areas of science. 17) A Belgian priest, Georges Lamaître, was the first to develop a “big bang” theory. In 1927, after studying red shifts of galaxies, he p ...
Take Home #1 Complete the following on your own paper. Do not
... C. Scientists work individually and do not usually interact with each other. D. Scientists each have jobs where they study completely different areas of science. 17) A Belgian priest, Georges Lamaître, was the first to develop a “big bang” theory. In 1927, after studying red shifts of galaxies, he p ...
... C. Scientists work individually and do not usually interact with each other. D. Scientists each have jobs where they study completely different areas of science. 17) A Belgian priest, Georges Lamaître, was the first to develop a “big bang” theory. In 1927, after studying red shifts of galaxies, he p ...
Lambda-CDM model
The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains a cosmological constant, denoted by Lambda (Greek Λ), associated with dark energy, and cold dark matter (abbreviated CDM). It is frequently referred to as the standard model of Big Bang cosmology, because it is the simplest model that provides a reasonably good account of the following properties of the cosmos: the existence and structure of the cosmic microwave background the large-scale structure in the distribution of galaxies the abundances of hydrogen (including deuterium), helium, and lithium the accelerating expansion of the universe observed in the light from distant galaxies and supernovaeThe model assumes that general relativity is the correct theory of gravity on cosmological scales.It emerged in the late 1990s as a concordance cosmology, after a period of time when disparate observed properties of the universe appeared mutually inconsistent, and there was no consensus on the makeup of the energy density of the universe.The ΛCDM model can be extended by adding cosmological inflation, quintessence and other elements that are current areas of speculation and research in cosmology.Some alternative models challenge the assumptions of the ΛCDM model. Examples of these are modified Newtonian dynamics, modified gravity and theories of large-scale variations in the matter density of the universe.