Chapter 25 & Chapter 26 Astronomy Test

33 Questions  I  By Kaysday
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Astronomy Quizzes & Trivia
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1.  ______ is the concept that all large samples of the universe are alike in appearance everywhere in the universe.
A.
B.
2.  While yet unseen, some gravitational evidence suggests the existence of dark gallaxies
A.
B.
3.  The Black hole at the center of active galaxie or quasar requires ______ to radiate massive amounts of energy
A.
B.
C.
4.  In the critical universe now proposed, the ration of matter / energy is about
A.
B.
5.  What is the effect on individual stars when galaxies collide?
A.
B.
6.  What is the meaning of a "closed universe"?
A.
B.
7.  While a variety of factors can reduce red shifts in the spectrum the red shift associated with the expansion of the universe is called
A.
B.
C.
8.  A billion solar mass black hole has a radius of only _____ (in A.U)
A.
B.
C.
9.  The satellite most responsible for studying the microwave universe and the nature of the cosmic background radiation
A.
B.
C.
10.  Which type of galaxy is rare in the center of clusters?
A.
B.
C.
11.  The best method of determining the mass of nearby spiral galaxies is by:
A.
B.
C.
12.  Recent work with Type I supernovae at great distances suggests the universe may in face be accelerating its expansion, a discovery attributed the newly found ______
A.
B.
C.
13.  According to their H-R diagrams turn off points, how old are the oldest globular clusters?
A.
B.
C.
14.  In their most energetic phase, a quasar can probably only last
A.
B.
C.
15.  Why are super-massive galaxies often found at the cores of rich galaxy clusters?
A.
B.
C.
16.  The last quasar probably died out a billion years ago, for none lie within a billion light years of us
A.
B.
17.  We now believe the majority of mass for most galaxies lies in their dark halos
A.
B.
18.  ________ Galaxies may bridge the gap between spiral galaxies and quasars.
A.
B.
C.
19.  Collisions between galaxies have a larger effect on the individual stars
A.
B.
20.  What determines whether colliding gallaxies will stick and merge or simply pass through eachother?
A.
B.
C.
21.  About how many galaxies are estimated to be in the observable universe?
A.
B.
C.
22.  Collisions between galaxies are rare, just as in case with stars.
A.
B.
23.  In our best current theory, how long ago did the first quasars form?
A.
B.
C.
24.  Dark matter is ____ %  of the matter in the universe
25.  What does the hubble law imply about the history of the universe?
A.
B.
26.  Why is it not correct to think of everything moving away from a central point in the universe?
A.
B.
27.  The central regions of active galaxies are fed by ____
A.
B.
C.
28.  A galaxy is at a distance of one billion light years. What is true about the way we see that galaxy?
A.
B.
C.
29.  Collisions between galaxies result in
A.
B.
C.
30.  Quasars end in a massive explosion as a gamma ray burst.
A.
B.
31.  If the density of the universe is less than critical we will experience a ________.
32.  What is the meaning of isotropic?
A.
B.
33.  The most massive galaxies have _____ of times more stars than the milky way.
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