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test 2 Flashcards

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1
Q

Spectral type of α Andromedae

A

B8IV

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2
Q

Another name for α Andromedae

A

Alpheratz

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3
Q

Spectral type of β Andromedae

A

M0III

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4
Q

Another name for β Andromedae

A

Mirach

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5
Q

Spectral type for γ1 Andromedae

A

K3III

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6
Q

Another name for γ1 Andromedae

A

Almach

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7
Q

Spectral type for δ Andromedae

A

K3III

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8
Q

Spectral type for 51 Andromedae

A

K3III

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9
Q

Another name for 51 Andromedae

A

Nembus

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10
Q

Spectral type for ο Andromedae

A

B6III

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11
Q

Spectral type for λ Andromedae

A

G8III

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12
Q

Spectral type for μ Andromedae

A

A5V

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13
Q

Name bright star, spectral type, and constellation (1)

A

Altair, A7 IV/V, Aquila

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14
Q

Name bright star, spectral type, and constellation (2)

A

Polaris, F7 Ib, Ursa minor

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15
Q

Name bright star, spectral type, and constellation (3)

A

Enif, K2 Ib, Pegasus

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16
Q

Name bright star, spectral type, and constellation (4)

A

Vega, A0 V, Lyra

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17
Q

Name bright star, spectral type, and constellation (5)

A

Deneb, A2 Ia, Cygnus

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18
Q

Name deep sky object in Andromedae (1)

A

M31

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19
Q

Name deep sky object in Andromedae (2)

A

NGC 752

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20
Q

Name deep sky object in Andromedae (3)

A

NGC 7662

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21
Q

Based on its main sequence turnoff point, the age of this cluster is:

A

About 10 billion years

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22
Q

Approximately how far is the Sun from the center of the galaxy?

A

28,000 light-years

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23
Q

Where does most star formation occur in the Milky Way today?

A

In the spiral arms

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24
Q

Why are telescopes sometimes called “time machines”?

A

Because observations of distant objects reveal them as they were in the past

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25
After a supernova type II event, what is left behind?
Always a neutron star
26
Which of the following is the closest in size (r) to a white dwarf?
Earth
27
Which of the following is the closest in size (r) to a neutron star?
A city
28
From the center outward, which of the following lists the "layers" of the sun in the correct order?
Core, Radiation Zone, Convection Zone, Photosphere, Chromosphere, Corona
29
How does the Sun generate energy today?
Nuclear fusion
30
A star's luminosity is the...
Total amount of light that the star radiates each second
31
The spectral sequence in order of decreasing temperature is:
O,B,A,F,G,K,M,
32
Which group represents stars that are cool and dim?
d
33
Which group represents stars that are hot but dim?
b
34
Which group represents stars of the smallest radii?
b
35
Which group represents stars of the largest radii?
e
36
Which group represents stars that are hot and very bright?
c
37
Which group represents hydrogen-burning stars with the shortest lifespan?
c
38
Which group represents hydrogen-burning stars with the longest lifespan?
d
39
Which group includes stars that are burning elements besides hydrogen in their cores?
a
40
What do astronomers mean when they say that we are all "star stuff"?
That the carbon, oxygen, and many elements essential tot life were created by nucleosynthesis in stellar cores
41
Your weird cousin... If he now wants to include tthe name of the galaxy's spiral-structure features in which the Earth is located, how should the address end?
Orion spur
42
A type of star cluster that contains mostly very old stars is...
A globular star cluster
43
In a collapsing star of high mass, when protons and neutrons are squeezed together with enormous force, they turn into a neutron and a:
Neutrino
44
A white dwarf, compared to a main sequence star with the same mass, would always be:
Smaller in diameter
45
What happens as an electron falls from a higher level to a lower level in an atom?
A photon is given off
46
As astronomers use the term- parallax of a star means:
One half the angle that a star shifts when seen from opposite sides of the Earth's orbit
47
The first astronomer who did photometry in a systematic way was:
Hipparctius
48
What happens when an interstellar cloud fragment shrinks?
Density rises, temperature increases, and the mass remains the same
49
What is the temperature rin the core of the Sun where hydrogen is fusing into helium?
10-15 million K
50
What is the typical age for a globular cluster?
~12 billion years
51
Which layer of the Sun do we normally see?
Photosphere
52
Which of the following luminosity classes refers tot the main sequence stars?
V
53
Which is true about globular clusters?
Most stars in the cluster are yellow or reddish in color
54
You are out on the beach enjoying the sunshine. As you glance up at the sun, the part of the Sun you can directly see is its:
Photosphere
55
The hottest zone in the Sun is the:
Core
56
The granulation pattern that astronomers have observed on the surface of the sun tells us that:
Hot material must be rising from the Sun's hotter interior
57
Suppose you put two protons near each other. Because of the electromagnetic force, the two protons will ____ each other
Repel
58
According to modern science, the sun is approximately _____ old
4.6 billion years
59
Sirius A is a main sequence V star and its companion Sirius B is a white dwarf VIII (D) star. The evolutionary theory implies that Sirius A originally was the less _____ of the pair and therefore evolved more rapidly
Hot
60
The central object of a planetary nebula is a _______.
Red giant
61
The shortest-lived main sequence stars are those with the spectral type _____.
O
62
The Sun will exhaust its nuclear fuel in about ______ years.
5 billion
63
Red stars are spectral type _____ and have a surface temperature of approximately ______ K.
M, 3500
64
The Sun's surface has a temperature of about _____ K.
5800
65
Betelgeuse is in the upper most right of the HR diagram, making it a _____.
M2-Iab
66
The central object of the crab nebula is called ____
Crab pulsar
67
Open clusters in the spiral arms contain _____ stars. In contrast, globular clusters of our Milky Way contain ______ stars.
younger, older

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