What are the classifications for galaxies?

spiral, elliptical, barred spiral, irregular

What is the primeval atom?

The universe at the very beginning, all "crunched up"

Active galaxies emit large amounts of radiation from their core because

massive black holes at the center interact with material

The Andromeda Galaxy is known in the catalogs as M31 *and* as NGC 224. Why does it have 2 names

Two different catalogs by two different people

Herschel and Messier were both known for...

creating catalogs of sky objects and identification numbers

Gamow calculated that ...

the primeval atom was ~10 billion K

What is true, according to the cosmological principle?

There is no center to the universe.

Hubble's law, V=HD, observes that....

galaxies further away from are moving away at higher speeds

What dictates how far we can see in space?

how far light can have traveled (cosmic horizon)

One possible source of the current set of observed galaxy shapes may be....

galaxy collisions rearranging star placements

Why do we see the Milky Way as a band in the sky?

It is a disk and we are inside of it

Why are the spectra of galaxies always red-shifted?

They're always moving away from us

When galaxies collide, which of the following is true?

Larger galaxies will absorb smaller galaxies

WMAP wanted to take a "baby picture" of the universe, so it measured...

the distribution of temperatures across the sky

In Hubble's Law, V=HD, V is the recession velocity. What is this?

how fast a galaxy is moving away from us

A "flat"universe will result in the typical outcomes you've been taught in geometry, which...

means that parallel lines will never meet

Alpher and Herman reasoned that....

there should be leftover radiation from the Big Bang

What is the difference between open and globular clusters?

In open clusters, stars are spread apart.

all of these answers are correct

Shapley was correct that our sun was not at the galaxy center, but Kapteyn was more correct...

about the size of the Milky Way

pushes objects away, speeding universe expansion

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Astronomy Unit 6 Review - Galaxies and Cosmology

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A review of the Astronomy unit about the Milky Way, other galaxies, and cosmology (the beginnings of our universe) #astronomy #cosmology #galaxies #bigbang #hubble

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Questions 60

Answers

1
The disk and arms of a spiral galaxy will typically contain more....
open clusters
globular clusters
rich clusters
poor clusters
2
What does WMAP tell us about the universe?
supports the Big Bang theory (rather than Steady State)
radiation distribution from the Big Bang
the universe is flat
all of these
3
In order for Hubble's law, V=HD, to be true right now, the universe....
has always been in existence
must be be expanding
will eventually die out
may collapse and then reform
4
What are the classifications for galaxies?
spiral, elliptical, barred spiral, irregular
1, 2, 3, 4
spiral, elliptical, circular, triangular
5
What is the primeval atom?
The ideal form of the universe as described by astronomers
The only element that existed before hydrogen
The universe at the very beginning, all "crunched up"
What will exist when all the stars in the universe "die"
6
Active galaxies emit large amounts of radiation from their core because
Hubble's law states that large star clusters will cause this
a pulsar causes local stars to explode
moving magnetic fields pull in matter
massive black holes at the center interact with material
7
Population II stars are...
bluer
smaller
younger
older
8
Irregular galaxies typically contain.....
less gas and dust
more dark matter
Population II stars
Population I stars
9
Who came up with the Primeval Atom theory?
Wilson
Herman
Einstein
Lemaitre
10
The halo and bulge of a spiral galaxy will typically contain more...
poor clusters
open clusters
globular clusters
rich clusters
11
The core of a galaxy, that contains a black hole, is called the....
halo
nucleus
disk
arms
12
The Andromeda Galaxy is known in the catalogs as M31 *and* as NGC 224. Why does it have 2 names
One name is due to shape, the other to composition
One catalog was for galaxies, one for stars
Two different catalogs by two different people
13
Herschel and Messier were both known for...
creating catalogs of sky objects and identification numbers
defining types of active galaxies
classifying galaxies by shape
classifying stars by temperature, spectra, and H line
14
Gamow calculated that ...
the universe is 27.4 billion light-years across
the primeval atom was ~10 billion K
the recession velocity of far-away galaxies
the black hole at the MW center is 100 million solar masses
15
This is a picture of what type of galaxy?
barred spiral
irregular
spiral
elliptical
16
What is true, according to the cosmological principle?
The center is where the primeval atom started.
There is no center to the universe.
The center of the universe is dark matter.
There is a definable center, but we don't know where.
17
Hubble's law, V=HD, observes that....
galaxies further away from are moving away at higher speeds
heavier elements are formed within stars
the universe is flat
all galaxy spectra are blue-shifted
18
What dictates how far we can see in space?
a road block
how far light can have traveled (cosmic horizon)
radio distance
the light from the sun
19
What is the shape/curvature of our universe?
negative
inverse
flat
positive
20
One possible source of the current set of observed galaxy shapes may be....
galaxy collisions rearranging star placements
supernovae pushing systems apart
Seyfert galaxies ejecting hot gas from their cores
stellar nurseries forming new stars
21
"Open" and "globular" refer to
clusters of galaxy clusters
filaments of dark matter
galaxy clusters
star clusters
22
Why do we see the Milky Way as a band in the sky?
It is a disk and we are inside of it
Because it IS a band
What band?
It's spilled milk.
23
Why are the spectra of galaxies always red-shifted?
They're always moving towards us
The Illuminati
They're not moving
They're always moving away from us
24
What is WMAP?
space vessel
standardized test
large telescope array
NASA satellite
25
In a spiral galaxy, Population I stars are typically found in the...
disk and bulge
arms and halo
disk and arms
halo and bulge
26
When galaxies collide, which of the following is true?
Stars collide and explode.
Galaxy shapes are not affected.
Elliptical galaxies turn into irregular galaxies.
Larger galaxies will absorb smaller galaxies
27
WMAP wanted to take a "baby picture" of the universe, so it measured...
the distribution of temperatures across the sky
the distribution of Population II stars across the sky
the distribution of galaxies compared to dark matter
the distribution of galaxy speeds
28
Who thought the Sun was 2/3 of the distance to the edge of the MW, but the MW was ~100,000 pc?
Jacobus Kapteyn
Abbe Lemaitre
Harlow Shapley
Sir William Herschel
29
What types of clusters are associated with galaxies?
rich, poor
open, globular
30
In Hubble's Law, V=HD, V is the recession velocity. What is this?
how fast a galaxy is expanding
how fast the universe is expanding
how fast a star is moving away from us
how fast a galaxy is moving away from us
31
This is a picture of what type of galaxy?
barred spiral
irregular
elliptical
spiral
32
Which type of galaxy ejects hot gas from its core?
Radio
Seyfert
Quasar
none of these
33
A "flat"universe will result in the typical outcomes you've been taught in geometry, which...
none of these choices
means that parallel lines will never meet
means parallel lines do eventually meet
means parallel lines get further away from each other
34
Which of the following are active galaxies?
radio
Seyfert
All of these
Quasars
35
"Rich" and "poor" refer to
galaxy clusters
clusters of galaxy clusters
filaments of dark matter
star clusters
36
Who thought the sun was at the center of the Milky Way, and the MW was ~20,000 pc in diameter?
Jacobus Kapteyn
Charles Messier
Edwin Hubble
Harlow Shapley
37
Alpher and Herman reasoned that....
the Milky Way is actually 30,000 pc in diameter
the universe is flat
there should be leftover radiation from the Big Bang
there must be an edge to the universe
38
Which type of active galaxy is extremely luminous and distant?
Quasar
Radio
None of these
Seyfert
39
This is a picture of what type of galaxy?
elliptical
irregular
barred spiral
spiral
40
What is the difference between open and globular clusters?
In globular clusters, stars are spread apart.
In open clusters, stars are spread apart.
In open clusters, galaxies are spread apart.
In globular clusters, galaxies are spread apart.
41
This is a picture of what type of galaxy?
elliptical
barred spiral
spiral
irregular
42
What holds galaxies together?
Gravity
The Force
Dark matter
Light
43
The primeval atom had....
large mass, low density
large mass, large density
small mass, low density
small mass, large density
44
Dark matter ...
all of these answers are correct
is invisible to us
has gravitational effects
is assumed to exist to account for mass "missing" from calcs
45
Shapley was correct that our sun was not at the galaxy center, but Kapteyn was more correct...
about the shape of the Milky Way
about the number of stars in the Milky Way
about the size of the Milky Way
about the existence of a black hole in the galaxy nucleus
46
Edwin Hubble classified....
Galaxies
Comets
Meteorites
Aliens
47
Galaxy clusters that contain < 100 members are called
poor clusters
rich clusters
globular clusters
open clusters
48
Dark energy...
is made when black holes form
balances gravity
pushes objects away, speeding universe expansion
is slowing the expansion of the universe
49
In a spiral galaxy, Population II stars are typically found in the...
arms and halo
halo and bulge
disk and bulge
disk and arms
50
How old is our universe?
4.6 billion years
10 billion years
25 billion years
13.7 billion years
51
Population I stars are.....
older
younger
larger
redder
52
One of the observable evidences that our universe is expanding is...
the Milky Way is such a large galaxy
almost all galaxy spectra are red-shifted
light bends around stars
the Milky Way will absorb the Magellanic Cloud galaxies
53
We cannot see beyond 13.7 billion light-years from Earth, the cosmic horizon. Why?
The universe is only 27.4 light-years across.
Because that's how far the universe has expanded
Light has not had time to travel any further
That's where the furthest objects are
54
What type of galaxy is the Milky Way?
barred spiral
spiral
it isn't one
spinny thing
55
What is a globular cluster?
massive cluster of 10,000-1 million stars
a small cluster of ~10 stars
small cluster of ~20 galaxies
large cluster of ~300 galaxes
56
How old is the Milky Way galaxy?
1.3 trillion years
13 trillion years
13 billion years
1.3 billion years
57
Elliptical galaxies typically contain more .....
Population II stars
dust and gas
Population I stars
voids
58
How many years does it take for the sun to revolve around the galaxy's center?
23.4 million years
240 million years
365 days
30 million trillion years
59
Penzais and Wilson were the first to show experimental evidence for ......
cosmological principle
the shape of the Milky Way
unexplained signals from intelligent life
cosmic microwave background
60
Why do include dark energy in our cosmological theories?
to explain the expansion of the universe
to explain energy conservation
to account for dark matter
the balance the force

Astronomy Unit 6 Review - Galaxies and Cosmology Flashcards | StudBud