Sample Exam 3
... 23) We use supernovae Ia instead of Cepheid variable stars to measure the distance to very distant galaxies, from only a billion years or so after the Big Bang, because A) there were no Cepheids in early galaxies. B) Cepheids are not bright enough to pick out. C) supernovae Ia events last longer tha ...
... 23) We use supernovae Ia instead of Cepheid variable stars to measure the distance to very distant galaxies, from only a billion years or so after the Big Bang, because A) there were no Cepheids in early galaxies. B) Cepheids are not bright enough to pick out. C) supernovae Ia events last longer tha ...
Galaxies have different sizes and shapes.
... Elliptical galaxies are shaped like spheres or eggs. Unlike spiral galaxies, ...
... Elliptical galaxies are shaped like spheres or eggs. Unlike spiral galaxies, ...
10.1 PPT
... expansion of a tiny volume of space, about 13.7 billion years ago. All the matter in the universe is thought to have been created at that moment. ...
... expansion of a tiny volume of space, about 13.7 billion years ago. All the matter in the universe is thought to have been created at that moment. ...
Name
... 17. Explain the big bang theory in as much detail as possible. Make sure you answer the following questions: 1. Is the universe expanding or getting smaller? 2. What evidence did the WMAP provide scientists about the big bang? 3. Is the universe cooling or getting hotter? Less or more dense? 4. How ...
... 17. Explain the big bang theory in as much detail as possible. Make sure you answer the following questions: 1. Is the universe expanding or getting smaller? 2. What evidence did the WMAP provide scientists about the big bang? 3. Is the universe cooling or getting hotter? Less or more dense? 4. How ...
Infinity Express
... The information and activities presented in the Infinity Express Teacher’s Guide have been adapted for use and distribution by OMSI from the following: Smithsonian National Air and Space Museum GLOSSARY ...
... The information and activities presented in the Infinity Express Teacher’s Guide have been adapted for use and distribution by OMSI from the following: Smithsonian National Air and Space Museum GLOSSARY ...
Groups of Stars
... Can contain more than a million stars. Usually do not have short-lived blue stars because these stars have already died out. Astronomers estimate that the oldest globular clusters are about 12 billion years old. Thus, the universe must be at least that old. ...
... Can contain more than a million stars. Usually do not have short-lived blue stars because these stars have already died out. Astronomers estimate that the oldest globular clusters are about 12 billion years old. Thus, the universe must be at least that old. ...
Colonization of the Milky Way The distances between the stars are
... • Our time calculation assumes a straight-line journey, but this is a ridiculous oversimplification. There are a few hundred billion stars in our galaxy, which at an average separation of a few light years means that the total distance traveled is around a trillion light years, which could not be tr ...
... • Our time calculation assumes a straight-line journey, but this is a ridiculous oversimplification. There are a few hundred billion stars in our galaxy, which at an average separation of a few light years means that the total distance traveled is around a trillion light years, which could not be tr ...
Hypothesis vs. Theory ~The Big Bang
... DOWN. Humans today are not used to looking UP, we are not used to observing the sky – it appears to be of little use – and city living with its extensive light pollution often prevents us from seeing, and hence exploring, the “heavens”. Most of us have some awareness that we are part of a system of ...
... DOWN. Humans today are not used to looking UP, we are not used to observing the sky – it appears to be of little use – and city living with its extensive light pollution often prevents us from seeing, and hence exploring, the “heavens”. Most of us have some awareness that we are part of a system of ...
~Crowfoot
... b) are the jets from a young star’s “helium flash.” c) harbor forming stars and solar systems. 4)2 The stars in this “Jewel Box” of the southern hemisphere are a) young stars still in their nursery “open cluster.” b) not physically associated, but aligned along our line of sight. c) in the nearest g ...
... b) are the jets from a young star’s “helium flash.” c) harbor forming stars and solar systems. 4)2 The stars in this “Jewel Box” of the southern hemisphere are a) young stars still in their nursery “open cluster.” b) not physically associated, but aligned along our line of sight. c) in the nearest g ...
Beyond our Sol. System
... 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 big that all of the matter in the Universe today was create ...
... 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 big that all of the matter in the Universe today was create ...
The Missing Mass
... Centripetal force does not strongly effect the gas that is above and below the rotation plane. So … • Gas falling in from the top collides with gas falling in from the bottom. This gas sticks together and forms the galaxy’s disk. • All star formation now occurs in a disk (where all the gas is). The ...
... Centripetal force does not strongly effect the gas that is above and below the rotation plane. So … • Gas falling in from the top collides with gas falling in from the bottom. This gas sticks together and forms the galaxy’s disk. • All star formation now occurs in a disk (where all the gas is). The ...
Stars and Galaxies - Lunar and Planetary Institute
... in different sizes (dwarf, large, giant) come in different shapes and classifications Spirals Ellipticals Lenticulars Irregulars ...
... in different sizes (dwarf, large, giant) come in different shapes and classifications Spirals Ellipticals Lenticulars Irregulars ...
Chapter 27 Quasars, Active Galaxies, and Gamma
... Rotation Curves Rotation curves of stars near the centers of most galaxies show the presence of supermassive black holes with mass ranging from 106 to 109 solar masses. Essentially all galaxies contain supermassive black holes and were likely active galaxies at some point in their lives. ...
... Rotation Curves Rotation curves of stars near the centers of most galaxies show the presence of supermassive black holes with mass ranging from 106 to 109 solar masses. Essentially all galaxies contain supermassive black holes and were likely active galaxies at some point in their lives. ...
1201 Discussion Notes
... OUT OF DISCUSSION ASSIGNMENT: 2 BONUS pts. The discussion after the next one is the last of the semester. If you could only ask one question before the exam, what would it be? Please email me this question. I should receive it by 11:59 pm on Sunday, December 5. I will send you a responding email con ...
... OUT OF DISCUSSION ASSIGNMENT: 2 BONUS pts. The discussion after the next one is the last of the semester. If you could only ask one question before the exam, what would it be? Please email me this question. I should receive it by 11:59 pm on Sunday, December 5. I will send you a responding email con ...
The Ionization Structure of the Irregular Galaxy NGC 4449
... Galaxies are gravitationally bound aggregations of stars, gas and dust. In the 1920's, Edwin Hubble classified galaxies by their shape into three major types, spiral, elliptical and irregular. Examples are shown in Figures 1a, b and c. More details about galaxies can be found in the article from thi ...
... Galaxies are gravitationally bound aggregations of stars, gas and dust. In the 1920's, Edwin Hubble classified galaxies by their shape into three major types, spiral, elliptical and irregular. Examples are shown in Figures 1a, b and c. More details about galaxies can be found in the article from thi ...
Galaxy Questions Info
... type of galaxy in the nearby universe. In contrast to spirals, the stars in ellipticals do not revolve around the center in an organized way. The stars move on randomly-oriented orbits within the galaxy like a swarm of bees. An irregular galaxy is neither spiral nor elliptical. Irregular galaxies te ...
... type of galaxy in the nearby universe. In contrast to spirals, the stars in ellipticals do not revolve around the center in an organized way. The stars move on randomly-oriented orbits within the galaxy like a swarm of bees. An irregular galaxy is neither spiral nor elliptical. Irregular galaxies te ...
This document was created for people who do not have access to
... Slide credit: R. Kirshner, CfA ...
... Slide credit: R. Kirshner, CfA ...
the size and structure of the universe
... Over 100 planets have been found OUTSIDE OF OUR SOLAR SYSTEM, orbiting other stars (called EXTRASOLAR PLANETS) ...
... Over 100 planets have been found OUTSIDE OF OUR SOLAR SYSTEM, orbiting other stars (called EXTRASOLAR PLANETS) ...
Jeopardy Questions
... A: The fact that the inner and outer stars in galaxies rotate at roughly the same speed ...
... A: The fact that the inner and outer stars in galaxies rotate at roughly the same speed ...
printer-friendly sample test questions
... 1. The expansion of the universe was first deduced from A. Edwin Hubble showing that more distant galaxies are moving away more rapidly. B. Edwin Hubble showing that more distant galaxies are moving away more slowly. C. Albert Einstein showing that space and matter expand at a decreasing rate. D. Al ...
... 1. The expansion of the universe was first deduced from A. Edwin Hubble showing that more distant galaxies are moving away more rapidly. B. Edwin Hubble showing that more distant galaxies are moving away more slowly. C. Albert Einstein showing that space and matter expand at a decreasing rate. D. Al ...
Figures I through VII in Section 1 on the following sheet
... Which spectrum would most likely have been produced by star B from figure X (_3_)? Of stars C and E in figure X, which is more likely to have produced the spectrum in figure II (_4_)? Why (_5_)? Of the stars labeled on figure X: Which two are the two hottest (_6_)? Which are the two brightest (_7_)? ...
... Which spectrum would most likely have been produced by star B from figure X (_3_)? Of stars C and E in figure X, which is more likely to have produced the spectrum in figure II (_4_)? Why (_5_)? Of the stars labeled on figure X: Which two are the two hottest (_6_)? Which are the two brightest (_7_)? ...
The Runaway Universe - Astronomy & Astrophysics Group
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
Galaxies
... • Astronomers now have decided that the morphology classification should consist of only two types of galaxies: the spiral and the elliptical. • Barred spirals are a subclass of spirals. Irregulars may be either spiral or barred spiral. ...
... • Astronomers now have decided that the morphology classification should consist of only two types of galaxies: the spiral and the elliptical. • Barred spirals are a subclass of spirals. Irregulars may be either spiral or barred spiral. ...
Galaxy Zoo
Galaxy Zoo is a crowdsourced astronomy project which invites people to assist in the morphological classification of large numbers of galaxies. (e.g.) It is an example of citizen science as it enlists the help of members of the public to help in scientific research. There have been seven versions up to July 2014, which are outlined in this article. Galaxy Zoo is part of the Zooniverse, a group of citizen science projects.