21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 1, Problem 15QP
To determine
The order of the occurrence over astronomical time.
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Students have asked these similar questions
The age of the universe can be determined if
a.
the universe is flat.
b.
the amount of dark matter in the universe can be accurately determined.
c.
the rate of recession of the galaxies in the Local Group can be accurately determined.
d.
the temperature of the cosmic background radiation can be accurately determined.
e.
the Hubble constant and density of the universe can be accurately determined.
The first evidence for the dark energy was that:
a. galaxies in clusters are moving too rapidly for the clusters to be bound.
b. Cepheid variable stars showed that galaxies were farther away that thought.
c. the cosmic microwave background spectrum was a perfect black body.
d.Type Ia supernovae appeared dimmer than predicted by Hubble’s law.
e.Einstein’s theory of gravity predicted that the Universe should collapse.
The assumption of isotropy states that
a.
the universe looks the same at all epochs.
b.
the universe looks the same from all locations over sufficiently great distances.
c.
the universe looks the same in all directions over sufficiently great distances.
d.
all of the above are true.
e.
none of the above are true.
Chapter 1 Solutions
21st Century Astronomy
Ch. 1.1 - Prob. 1.1CYUCh. 1.2 - Prob. 1.2CYUCh. 1.3 - Prob. 1.3CYUCh. 1 - Prob. 1QPCh. 1 - Prob. 2QPCh. 1 - Prob. 3QPCh. 1 - Prob. 4QPCh. 1 - Prob. 5QPCh. 1 - Prob. 6QPCh. 1 - Prob. 7QP
Ch. 1 - Prob. 8QPCh. 1 - Prob. 9QPCh. 1 - Prob. 10QPCh. 1 - Prob. 11QPCh. 1 - Prob. 12QPCh. 1 - Prob. 13QPCh. 1 - Prob. 14QPCh. 1 - Prob. 15QPCh. 1 - Prob. 16QPCh. 1 - Prob. 17QPCh. 1 - Prob. 18QPCh. 1 - Prob. 19QPCh. 1 - Prob. 20QPCh. 1 - Prob. 21QPCh. 1 - Prob. 22QPCh. 1 - Prob. 23QPCh. 1 - Prob. 24QPCh. 1 - Prob. 25QPCh. 1 - Prob. 26QPCh. 1 - Prob. 27QPCh. 1 - Prob. 28QPCh. 1 - Prob. 29QPCh. 1 - Prob. 30QPCh. 1 - Prob. 31QPCh. 1 - Prob. 32QPCh. 1 - Prob. 33QPCh. 1 - Prob. 34QPCh. 1 - Prob. 35QPCh. 1 - Prob. 36QPCh. 1 - Prob. 37QPCh. 1 - Prob. 38QPCh. 1 - Prob. 39QPCh. 1 - Prob. 40QPCh. 1 - Prob. 41QPCh. 1 - Prob. 42QPCh. 1 - Prob. 43QPCh. 1 - Prob. 44QPCh. 1 - Prob. 45QP
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- What is the approximate temperature of the universe that we currently observe? a. 0 K b. 2.7 K c. 273 K d. 3000 K e. 6000 Karrow_forwardEarly astronomers thought that galaxies were single stars. Why was this mistake easy to make? A. Galaxies are so far away that they look like a single star. B. Galaxies are made of stars that you can only see one at a time. C. Light from galaxies collects into a single beam. D. Earth is small and galaxies are much larger.arrow_forward1. Which of these is true about the Big Bang model? a. The singularity is an established, well-defined part of the model. b. Cosmic expansion stopped at some point in time. c. Part of its proof is the amounts of H and He we have in the universe today. d. The Big Bang was a big explosion that threw matter into many different directionsarrow_forward
- The first evidence for the dark energy was that: a. the cosmic microwave background spectrum was a perfect black body. b. Einstein’s theory of gravity predicted that the Universe should collapse. c. Type Ia supernovae appeared dimmer than predicted by Hubble’s law. d. Cepheid variable stars showed that galaxies were farther away that thought. e. galaxies in clusters are moving too rapidly for the clusters to be bound.arrow_forwardHow does the age of the universe relate to the Hubble constant? a. The smaller the constant, the older the universe. b. The larger the constant, the older the universe. c. The Hubble constant is the age of the universe. d. The Hubble constant is the square of the universe. e. It is impossible to tell the age of the universe from the Hubble constant.arrow_forwardIn an open universe, the overall geometry of the Universe would be a. flat b. spherical c. hyperbolicarrow_forward
- The type of universe in which the average density is predicted to be greatest is the a. open universe. b. flat universe. c. closed universe. d. negatively curved universe.arrow_forwardSuppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In this case, A. Galaxy 1 must be twice as big as Galaxy 2. B. we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than Galaxy 2. C. we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2. D. Galaxy 2 must be twice as old as Galaxy 1.arrow_forwardREVIEW atch the terms with the definitions. E astronomy .1) A. characterized by a completed round of events 2) star B. the theory that the Earth is the center of our universe 3) planet C. a large solid body in space that revolves about a star 4) geocentric D. a gaseous body that shines by its own light and emits heat A E. the science that investigates motions, physical make-up, distances, and other characteristics of all objects in space, including Earth 5) cyclical Il in the blanks. .6) "Star law" is the literal meaning of the word 1.7) Astronomy made gains as recognized science during Europe's or revival of learning. 1.8) Sumerian observers plotted the movements of our Sun, Moon, and other planets by dividing the sky into and made planets reverse 1.9) Ptolemy's theory that the existence of themselves at certain points on their journeys around Earth was incorrect. Choose the best answers. 1.10) A D Which two ways haye people found astronomy to be useful to their lives? A. navigationarrow_forward
- The cosmic background radiation comes from a time in the evolution of the universe a. when protons and neutrons were first formed. b. when the big bang first began to expand. c. that is known as the inflationary period. d. when gamma rays had enough energy to destroy nuclei. e. when electrons began to recombine with nuclei to form atoms.arrow_forwardThe resolution of Olbers’s paradox suggests that it gets dark at night because a. the universe is not infinite in age. b. the universe is static. c. the universe is closed. d. a and b are true. e. all of the above are true.arrow_forwardWhich statement best describes the Big Bang Theory? O Galaxies within the universe collided about 13.5 billion years ago forming the present objects in the universe. O Existing objects in the universe move randomly with the potential of colliding in about 13.5 billion years. O Galaxies throughout the universe moved toward each other after an event that occurred about 13.5 billion years ago O Most objects in the universe are moving away from each other as a result of an event that occurred about 13.5 billion years ago. 21 22 23 24 25 26 27 28 Support | Schoology Blog | PRIVACY POLICYarrow_forward
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