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Chapter 25 & Chapter 26 Astronomy Test

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