Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Astromy 104 > Final > Flashcards

Final Flashcards

1
Q

Which planet shows the widest range of surface temperatures between day and night?

A

Mercury

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which planet planet has the densest atmosphere?

A

Venus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the chief component of the Venusian atmosphere?

A

Carbon dioxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Mercuries surface mostly resembles what?

A

The lunar far side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

That the tharsis region on Mars has so few craters suggests what?

A

It is the youngest side on the planet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which of the Galilean moons is the densest and has the most geologically active?

A

Io

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The atmospheric pressure on Venus is what?

A

Much higher than on earth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Small deviations in a planets orbital motion imply what?

A

The nearby presence of a massive body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is true of Mars?

A

Iron oxide on the surface is responsible for its reddish color

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In terms of axial tilt which of the Jovians show us the largest inclination?

A

Uranus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which 3 bodies have almost identical densities?

A

Mercury, Venus and earth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

If you found a bathtub big enough to hold Saturn what would happen?

A

It would float

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Our most detailed information of the Jovian planets comes from what?

A

Spacecraft exploration.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Jupiter and other Jovian planets are noticeably oblate because

A

They are fluid bodies that are spinning rapidly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is true about the seasons of Uranus

A

It’s strange tilt produces extreme seasonal variations especially at the poles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What would Jupiter have needed to become a star?

A

Enough additional mass to make the planet hotter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is thought to lie at the center of Jupiter?

A

A massive core of rocky materials with some iron mixed in it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Essentially the Great Red Spot is what?

A

A large cyclonic storm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is thought to cause io’s volcanism?

A

Tidal stresses from. Both Jupiter and Europa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What are the four moons of Jupiter?

A

Io, Europa, Ganymede Callisto

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

A moon with a smooth uncratered Surface would imply what?

A

The surface is very young

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Inside the Roche limit what happens?

A

Large moons are torn apart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

The largest moon in The solar system bigger than but not as massive as Mercury is what?

A

Ganymede

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

The Suns average density is almost exactly the same as what?

A

Jupiter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

The temperature of the Suns photosphere is what?

A

5800 kelvin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Typically a granule in the photosphere is about the size of what?

A

Texas 1000km across

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What two energy sources energy transport mechanisms, in order from outside the core to the surface are found in the sun?

A

Radiative diffusion, convection.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

The outward pressure of hot gas in the sun

A

Is balanced by the inward gravitational pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

The solar winds blow outward from where?

A

The coronal holes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

How long does the sunspot cycle last?

A

11 years

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What do sunspots do

A

They come in pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

The most striking example of of sunspot variability was when?

A

Maunder Minimum from 1645-1715

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Today the primary source of the Suns energy is what?

A

The strong force fusing hydrogen into helium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

In the proton- proton cycle the positron is what?

A

An anti electron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

A star is 10 parsecs from earth is what?

A

The star is about 33 Lightyears away

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

A stars absolute magnitude is its apparent brightness as seen from what?

A

33 Lightyears distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

The stars a Cygni and B Cygni are constellations in Cygnus which star is brighter?

A

a Cygni appears brighter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

If vega is apparent magnitude zero,and Deneb first magnitude then?

A

Deneb must be a main sequence and vega a giant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Rigel has an apparent magnitude of +0.18 and Betelgeuse an apparent magnitude of +0.45. What does this conclude?

A

Rigel is brighter than Betelgeuse.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

The spectral type of a star measures its what?

A

Temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

What can be said with certainty about a red and blue star?

A

The blue star is hotter than the red star

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

The H-R diagram can plot what?

A

Temperature versus luminosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

In general what is true about the alpha Star in a constellation?

A

It is the brightest in the constellation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

What are constellations?

A

Groups of stars making an apparent pattern in the celestial sphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

The 26000 year cycle that changes the poles and equinoxes is called what?

A

Precession

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

From the horizon to the observers zenith directly overhead is an angle of what?

A

90 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

When the moon is directly opposite the Sun in the sky its phase is what?

A

Full moon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

If you are in the moons umbral shadow then you will witness what?

A

A total solar eclipse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

That Polaris will not always be the North Star is due to what?

A

Precession shifting the celestial pole

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

What is not a form of electromagnetic radiation?

A

Direct current from your car battery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

Relative to the comet the direction of the ion tail tells us what?

A

The direction of the sun

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

A waves velocity is the product of what?

A

Frequency times the wavelength of the wave.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

What is emitted when an electron falls from a higher to lower orbital?

A

A photon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

If a source of light is approaching us at 3000 km/sec then all its waves are what?

A

Blue shifted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

Electromagnetic radiation can do what?

A

Behave both as a wave and a packet of energy ( photons)

56
Q

As the solar nebula contracts it does what?

A

Spins faster due to the conservation of angular momentum

57
Q

What is true about the black body curve?

A

If it’s temperature is doubled the peak in it’s curve would be doubled in wavelength

58
Q

In the Kelvin scale, absolute zero lies at what temperature?

A

Zero K

59
Q

The Manicouagan reservoir near Quebec is an example of what?

A

A large meteorite impact

60
Q

A circular orbit would have the eccentricity of what?

A

0

61
Q

The Jovian planets do what?

A

All spin slower than the earth

62
Q

What is not a telescopic discovery of Galileo?

A

The rings of Saturn

63
Q

When a planets orbit takes it closer to the sun its called what?

A

Perihelion peri= towards Helion= sun

64
Q

The star wolf 1061 has a parallax of 2.34 arc seconds , while the star Ross 652 has a parallax of 1.70 as which star is closer to earth?

A

Ross 652

65
Q

The primary purpose of a telescope is to do what?

A

Collect a large amount of light and bring it into focus

66
Q

A fatal flaw with the the ptolmeys model is it inability to predict the phases of what?

A

Venus

67
Q

What is true about solar system densities?

A

The denser planets lie closer to the sun.

68
Q

Planetary orbits are what?

A

Almost circular with low eccentricities

69
Q

Earth’s magnetic field does what?

A

Prevents charged particles in the solar wind from reaching the surface.

70
Q

What theory best explains the moons Origin?

A

Impact theory

71
Q

What is the resolution of a telescope

A

It’s ability to distinguish two adjacent objects close together In the sky

72
Q

The moons near side always faces earth due to what?

A

Earths tidal force

73
Q

Which portion of our atmosphere blocks ultra violet radiation the best?

A

The ozone layer

74
Q

At what phase would you expect to find extremely high and low tides?

A

Both new and full moons

75
Q

The tail of a comet always points to where?

A

Away from the sun and becomes the brightest at perihelion.

76
Q

When strong solar winds are displaced toward earths magnetic poles we get what?

A

Intense aurora displays

77
Q

The atmospheric gases primarily responsible for our green house effect are what?

A

Water vapor and carbon dioxide

78
Q

The Kuiper belt is found where in the solar system?

A

Beyond the orbit of Neptune

79
Q

Density is defined as what?

A

Mass per unit volume

80
Q

What has replaced photographic film in astronomical imaging?

A

CCD

81
Q

What is the apparent path the sun takes though the sky?

A

Ecliptic

82
Q

Our seasons are a consequence of what?

A

The earths 23.5 degree tilt

83
Q

The only planet with no atmosphere of consequence is what?

A

Mercury

84
Q

The ozone layer blocks out what?

A

The Suns uv radiation

85
Q

All planets lie in orbit close to what?

A

The ecliptic plane

86
Q

Interstellar gas is mainly composed of what?

A

90% hydrogen and 9% helium

87
Q

What affect does even thin clouds of dust have on light passing through them?

A

It dims and reddens them

88
Q

Some regions along the Milky Way are dark because of what?

A

Stars in that region are hidden by dark dust particles

89
Q

Due to absorption of shorter wavelength by interstellar dust clouds distant stars appear what?

A

Redder

90
Q

When a stars inward gravity and outward pressure are balanced the star is said to be in what?

A

Hydrostatic equilibrium

91
Q

The single most important determinant of the temperature, density, radius luminosity and pace of a protostar is what?

A

The mass

92
Q

What temperature is needed to fuze helium into carbon?

A

100m kelvin

93
Q

The helium flash converts helium nuclei into what?

A

Carbon

94
Q

Can a star become a red giant more than once?

A

Yes before and after the the helium flash

95
Q

Why can’t a iron core support a giant star?

A

Iron cannot fuze with other elements and produce additional energy in fusion.

96
Q

A surface explosion when a companion spills hydrogen onto it’s close white dwarf companion creates what?

A

A nova

97
Q

Type II supernova occur when their cores start making what?

A

Iron

98
Q

Neuron stars have what?

A

Very strong magnetic fields

99
Q

In the lighthouse models of pulsars

A

If the beam sweeps across us, we will detect a pulse of radiation

100
Q

In a neutron star the core is

A

Electrons and protons packed so tightly they are in contact.

101
Q

Most pulsars are observed only as what type of source?

A

A radio source

102
Q

In a hypernova, very energetic supernova creates what?

A

A blackhole

103
Q

A blackholes escape velocity is equal to what?

A

The speed of light

104
Q

What explanation does general relativity provide for Gravity?

A

Gravity is the result of curved space time

105
Q

As a spaceship nears an event horizon a clock on the spaceship will be seen by an outsider observer to what?

A

Run slowly

106
Q

If light from a distant star passes close to a massive body the beam of light will do what?

A

Bend towards the massive body due to gravity

107
Q

As a spaceships velocity gets closer to the speed of light what will happen?

A

It’s length will decrease and its clock will run more slowly

108
Q

What can we detect from matter that has crossed an event horizon?

A

Nothing

109
Q

An observer on a planet sees a spaceship approaching at 0.5c. A Beam of light project by the ship would be measured by this observer at what?

A

C the speed of light.

110
Q

ALL RR lyrae stars have about the same what?

A

Luminosity

111
Q

A method for identifying a blackhole is to do what?

A

Look for their effects on nearby companions

112
Q

Why was herschels strategy for mapping our galaxy flawed?

A

He relied on visual wavelengths which are obscured by dust

113
Q

The period-luminosity relation is critical in finding the distance with what?

A

Cepheid variables

114
Q

Where is the sun located in our galaxy?

A

In the disk, and about halfway away from the center

115
Q

Detailed measurements of the disk suggest our Milky Way is what type of galaxy?

A

Barred spiral galaxy (SBB)

116
Q

What is true about the stellar populations in the galaxy?

A

Only old stars are found in the halo

117
Q

Density waves may explain what?

A

The spiral arm structure of the galaxy

118
Q

According to hubble’s law, the greater a galaxies redshift the what?

A

Farther away from us it is

119
Q

The flattest of the elliptical galaxies are what?

A

E7

120
Q

The astronomer who originally classified galaxies into S, E, and Irr was who?

A

Edwin Hubble

121
Q

The Tully-Fisher Relation exists between the galaxy’s luminosity and its what?

A

Rotation

122
Q

The Milky Way is often considered to be a intermediary wound, barred spiral, which would be what classification?

A

SBb

123
Q

While examining the spectrum of a galaxy you find all the hydrogen lines are shifted to longer wavelengths this galaxy is what?

A

Moving away from us

124
Q

Collisions between galaxies is thought to what?

A

Be commonplace

125
Q

Where on the H-R diagram a stars position on the main sequence depends on what?

A

The mass

126
Q

Variable stars are ones whose what changes over time?

A

Luminosity

127
Q

What type of supernova produce no neuron stars, only ejected debris?

A

Type 1 supernova

128
Q

Which of these are not associated with the active sun?

A

Winter storms

129
Q

As we look at larger and larger scales in the universe we find what?

A

A larger and larger percentage of the matter is dark

130
Q

If the merger theory is correct , the bright active galaxy nuclei should what?

A

Contain super massive blackholes

131
Q

Homogeneity and isotropy, taken as assumptions regarding the structure and evolution of the universe are knows as what?

A

The cosmological perspective

132
Q

The redshift of galaxies is correctly interpreted as what?

A

Space itself is expanding with time so the photons are stretched while they travel through space

133
Q

The concept that on the grandest scales the universe is similar in appearance everywhere is what?

A

Homogeneity

134
Q

The concept that the direction of observation does not matter overall is what?

A

Isotropy

135
Q

What organism can live in extreme environments?

A

Extremephelis

Astromy 104 (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions