What are the classifications for galaxies?

spiral, elliptical, barred spiral, irregular

all of these answers are correct

What is true, according to the cosmological principle?

There is no center to the universe.

When galaxies collide, which of the following is true?

Larger galaxies will absorb smaller galaxies

Why do include dark energy in our cosmological theories?

to explain the expansion of the universe

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

the distribution of temperatures across the sky

We cannot see beyond 13.7 billion light-years from Earth, the cosmic horizon. Why?

Light has not had time to travel any further

pushes objects away, speeding universe expansion

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

means that parallel lines will never meet

What is a globular cluster?

massive cluster of 10,000-1 million stars

Why are the spectra of galaxies always red-shifted?

They're always moving away from us

One of the observable evidences that our universe is expanding is...

almost all galaxy spectra are red-shifted

What is the primeval atom?

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

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

It is a disk and we are inside of it

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Duplicate of 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)

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Questions 30

Answers

1
This is a picture of what type of galaxy?
elliptical
spiral
barred spiral
irregular
2
What are the classifications for galaxies?
spiral, elliptical, barred spiral, irregular
spiral, elliptical, circular, triangular
1, 2, 3, 4
3
What is WMAP?
large telescope array
NASA satellite
space vessel
standardized test
4
Dark matter ...
all of these answers are correct
is assumed to exist to account for mass "missing" from calcs
is invisible to us
has gravitational effects
5
What is true, according to the cosmological principle?
The center is where the primeval atom started.
There is a definable center, but we don't know where.
The center of the universe is dark matter.
There is no center to the universe.
6
When galaxies collide, which of the following is true?
Galaxy shapes are not affected.
Larger galaxies will absorb smaller galaxies
Stars collide and explode.
Elliptical galaxies turn into irregular galaxies.
7
Why do include dark energy in our cosmological theories?
the balance the force
to explain energy conservation
to explain the expansion of the universe
to account for dark matter
8
WMAP wanted to take a "baby picture" of the universe, so it measured...
the distribution of Population II stars across the sky
the distribution of temperatures across the sky
the distribution of galaxies compared to dark matter
the distribution of galaxy speeds
9
How old is our universe?
4.6 billion years
10 billion years
13.7 billion years
25 billion years
10
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
That's where the furthest objects are
Light has not had time to travel any further
11
The halo and bulge of a spiral galaxy will typically contain more...
open clusters
rich clusters
globular clusters
poor clusters
12
Galaxy clusters that contain < 100 members are called
poor clusters
open clusters
globular clusters
rich clusters
13
This is a picture of what type of galaxy?
barred spiral
irregular
spiral
elliptical
14
"Open" and "globular" refer to
star clusters
galaxy clusters
clusters of galaxy clusters
filaments of dark matter
15
Which type of active galaxy is extremely luminous and distant?
Quasar
Seyfert
None of these
Radio
16
Dark energy...
is made when black holes form
is slowing the expansion of the universe
pushes objects away, speeding universe expansion
balances gravity
17
How many years does it take for the sun to revolve around the galaxy's center?
365 days
240 million years
23.4 million years
30 million trillion years
18
The core of a galaxy, that contains a black hole, is called the....
nucleus
disk
arms
halo
19
This is a picture of what type of galaxy?
spiral
elliptical
barred spiral
irregular
20
A "flat"universe will result in the typical outcomes you've been taught in geometry, which...
means parallel lines do eventually meet
none of these choices
means that parallel lines will never meet
means parallel lines get further away from each other
21
What is a globular cluster?
massive cluster of 10,000-1 million stars
small cluster of ~20 galaxies
large cluster of ~300 galaxes
a small cluster of ~10 stars
22
What types of clusters are associated with galaxies?
open, globular
rich, poor
23
Why are the spectra of galaxies always red-shifted?
They're always moving towards us
The Illuminati
They're always moving away from us
They're not moving
24
One of the observable evidences that our universe is expanding is...
the Milky Way will absorb the Magellanic Cloud galaxies
light bends around stars
the Milky Way is such a large galaxy
almost all galaxy spectra are red-shifted
25
This is a picture of what type of galaxy?
irregular
barred spiral
elliptical
spiral
26
What holds galaxies together?
Gravity
The Force
Dark matter
Light
27
What is the primeval atom?
The universe at the very beginning, all "crunched up"
The ideal form of the universe as described by astronomers
The only element that existed before hydrogen
What will exist when all the stars in the universe "die"
28
The disk and arms of a spiral galaxy will typically contain more....
rich clusters
globular clusters
open clusters
poor clusters
29
Edwin Hubble classified....
Aliens
Comets
Galaxies
Meteorites
30
Why do we see the Milky Way as a band in the sky?
Because it IS a band
It's spilled milk.
It is a disk and we are inside of it
What band?

Duplicate of Astronomy Unit 6 Review - Galaxies and Cosmology Flashcards | StudBud