Astronomy Honors Mid term Study Guide
... 23. What is the Hubble Law? 24. What are the Hubble Constant and its currently most accepted value ( in the commonly used units for this constant)? 25. Describe Olber’s Paradox and its resolution (explanation) 26. Describe evidence for the Universe being open, closed , or flat. 27. What is the cosmo ...
... 23. What is the Hubble Law? 24. What are the Hubble Constant and its currently most accepted value ( in the commonly used units for this constant)? 25. Describe Olber’s Paradox and its resolution (explanation) 26. Describe evidence for the Universe being open, closed , or flat. 27. What is the cosmo ...
Physical Cosmology
... What is cosmology about? Cosmology from Greek s world s word, reasoning, theory Physical Cosmology studies the Universe as a whole, draws on many branches of Physics. It tries to explain the following properties of the Universe: ...
... What is cosmology about? Cosmology from Greek s world s word, reasoning, theory Physical Cosmology studies the Universe as a whole, draws on many branches of Physics. It tries to explain the following properties of the Universe: ...
History of the Universe and Solar System
... 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 explained by “dark phantom e ...
... 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 explained by “dark phantom e ...
Answers to Coursebook questions – Chapter E4
... The significance of the CMBR is that it is black body radiation coming from all directions, indicating that it does not have any specific source. It fills the universe and was once at the very high temperature that was ambient in the early universe. As the universe expanded and cooled down, the radi ...
... The significance of the CMBR is that it is black body radiation coming from all directions, indicating that it does not have any specific source. It fills the universe and was once at the very high temperature that was ambient in the early universe. As the universe expanded and cooled down, the radi ...
Expanding Universe
... A galaxy happens about every 100 years in an average galaxy. So every year is you look in 100 galaxies, Or 10 per year if you look in 1,000 galaxies. ...
... A galaxy happens about every 100 years in an average galaxy. So every year is you look in 100 galaxies, Or 10 per year if you look in 1,000 galaxies. ...
Cosmology Fact Sheet
... accurate. Parallax measurements using the Earth’s orbit as a baseline allow us to find the distance to stars in our own galaxy quite well. Distances longer than this are no good though. However, if you measure the distance to a certain type of star using parallax and see how bright it is, then you h ...
... accurate. Parallax measurements using the Earth’s orbit as a baseline allow us to find the distance to stars in our own galaxy quite well. Distances longer than this are no good though. However, if you measure the distance to a certain type of star using parallax and see how bright it is, then you h ...
HOT Big Bang
... hydrogen is a gas of atoms. Much of the interstellar gas in our Galaxy is atomic hydrogen. density ≈ 10 atoms/cm3 T ≈ 100 K ...
... hydrogen is a gas of atoms. Much of the interstellar gas in our Galaxy is atomic hydrogen. density ≈ 10 atoms/cm3 T ≈ 100 K ...
NEW GCSE REVISION Beginning of the Universe - crypt
... The red-shift of a distant galaxy ______________ with distance from us. a) i) The further away a distant galaxy is, the ______________ the speed at which it is moving away from us. ii) All the distant galaxies are moving ______________ from each other. b) i) The Universe must be ______________ becau ...
... The red-shift of a distant galaxy ______________ with distance from us. a) i) The further away a distant galaxy is, the ______________ the speed at which it is moving away from us. ii) All the distant galaxies are moving ______________ from each other. b) i) The Universe must be ______________ becau ...
Solutions to HW 1-2
... expansion, any initial curvature of the Universe would be stretched to near flatness. Horizon problem: the CMB is strikingly uniform in every direction we look in the sky. Opposite directions of the sky are too far away to have ever been in casual contact in order to come to thermal equilibrium (i.e ...
... expansion, any initial curvature of the Universe would be stretched to near flatness. Horizon problem: the CMB is strikingly uniform in every direction we look in the sky. Opposite directions of the sky are too far away to have ever been in casual contact in order to come to thermal equilibrium (i.e ...
Lecture17
... are now being tested, such as ion engines. Ions are charged atoms, which can be accelerated by an electric field to very high speed . They are more effective than chemical rockets (per pound of fuel), and can even be run on solar energy. They create much less thrust, but for a much longer time. ...
... are now being tested, such as ion engines. Ions are charged atoms, which can be accelerated by an electric field to very high speed . They are more effective than chemical rockets (per pound of fuel), and can even be run on solar energy. They create much less thrust, but for a much longer time. ...
The Universe and Big Bang Theory Review Sheet
... -Widely accepted theory that explains how the universe began. In the beginning, the entire universe was confined to a dense, hot, super massive ball. Then about 13.7 billion years ago a gigantic explosion occurred, hurling this material in all directions. The universe began to expand and cool. After ...
... -Widely accepted theory that explains how the universe began. In the beginning, the entire universe was confined to a dense, hot, super massive ball. Then about 13.7 billion years ago a gigantic explosion occurred, hurling this material in all directions. The universe began to expand and cool. After ...
Unit 3 - Section 9.7 Stellar Spectra, Dark Matter0
... OR combined with protons to make deuterium (an isotope of hydrogen). As it continued to cool, the Universe eventually reached the temperature where electrons combined with nuclei to form neutral atoms….and so it began Is this possible? Well in 1929, Edwin Hubble taught us the Universe is expanding. ...
... OR combined with protons to make deuterium (an isotope of hydrogen). As it continued to cool, the Universe eventually reached the temperature where electrons combined with nuclei to form neutral atoms….and so it began Is this possible? Well in 1929, Edwin Hubble taught us the Universe is expanding. ...
Document
... 28.3 How the solar system formed Scientists think that the solar system was formed out of the same nebula that created the ...
... 28.3 How the solar system formed Scientists think that the solar system was formed out of the same nebula that created the ...
Chapter 01
... to follow. It is easy to learn a few facts, but it is the relationships between facts that are interesting. The relationships illustrated in this chapter will give us a perspective on our place in the cosmos. While we study the cosmos, we will observe the process by which we learn. That process, sci ...
... to follow. It is easy to learn a few facts, but it is the relationships between facts that are interesting. The relationships illustrated in this chapter will give us a perspective on our place in the cosmos. While we study the cosmos, we will observe the process by which we learn. That process, sci ...
The Milky Way - Department of Physics
... to follow. It is easy to learn a few facts, but it is the relationships between facts that are interesting. The relationships illustrated in this chapter will give us a perspective on our place in the cosmos. While we study the cosmos, we will observe the process by which we learn. That process, sci ...
... to follow. It is easy to learn a few facts, but it is the relationships between facts that are interesting. The relationships illustrated in this chapter will give us a perspective on our place in the cosmos. While we study the cosmos, we will observe the process by which we learn. That process, sci ...
Big Bang Theory
... • A young universe-the images captured by the satellites COBE and WMAP show a young universe at about 0.002% its present age. At this time it was very small, yet from our point of view it seems a huge shell that surrounds us. We see it in all directions as red-shifted when in fact it was still reall ...
... • A young universe-the images captured by the satellites COBE and WMAP show a young universe at about 0.002% its present age. At this time it was very small, yet from our point of view it seems a huge shell that surrounds us. We see it in all directions as red-shifted when in fact it was still reall ...
Universal redshift, the Hubble constant The cosmic background
... In Gamow papers from 1940s this figure is quoted as the age of the Universe, with a disclaimer, it is probably underestimated. The age greater than 2 eons was given to the Earth from (nucleo-)geological investigations. ...
... In Gamow papers from 1940s this figure is quoted as the age of the Universe, with a disclaimer, it is probably underestimated. The age greater than 2 eons was given to the Earth from (nucleo-)geological investigations. ...
1. a) Astronomers use the parallax method to measure
... a) What sort of a measurement did I make to determine that speed? I measured the Doppler shift. That is, I measured the shift in the spectrum to longer wavelengths from what was emitted. With our balloons we measured the change in distance with time, but we can’t do that with the real Universe. b) W ...
... a) What sort of a measurement did I make to determine that speed? I measured the Doppler shift. That is, I measured the shift in the spectrum to longer wavelengths from what was emitted. With our balloons we measured the change in distance with time, but we can’t do that with the real Universe. b) W ...
r - astronomy.ohio
... The origin of the expansion (in Newton’s terms, the force that caused the initial acceleration) was in the very early universe. To describe the very early universe, we need a good theory of “quantum gravity”. ...
... The origin of the expansion (in Newton’s terms, the force that caused the initial acceleration) was in the very early universe. To describe the very early universe, we need a good theory of “quantum gravity”. ...
Day_2
... A scientific hypothesis is an idea that leads to testable or falsifiable predictions. The cosmological principle is a very important underlying assumption: • “There is nothing special about our place in the universe.” ...
... A scientific hypothesis is an idea that leads to testable or falsifiable predictions. The cosmological principle is a very important underlying assumption: • “There is nothing special about our place in the universe.” ...
The Life of the Universe - University of Minnesota
... nucleus would become the size of our solar system • Creates density enhancements that give rise to the structure we observe today ...
... nucleus would become the size of our solar system • Creates density enhancements that give rise to the structure we observe today ...
Astronomy and Cosmology Exam Review
... 2) What does the red shift tell us about the motion of the universe? It is expanding 3) What is currently the most accepted theory about the origin of the universe called? Big Bang 4) What can I tell about a star based on its color? What elements are present 5) What is the most common unit for measu ...
... 2) What does the red shift tell us about the motion of the universe? It is expanding 3) What is currently the most accepted theory about the origin of the universe called? Big Bang 4) What can I tell about a star based on its color? What elements are present 5) What is the most common unit for measu ...