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deck_4403612 Flashcards

1
Q

Why are all modern constellations in the sky

A

our astronomy is based on western civilization, which doesnt include the southern sky

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2
Q

What does the Greek lettering system tell you about a star that the name doesn’t?

A

Significance of the star within the constellation it is in

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3
Q

Where can you not see the pole star?

A

Southern hemisphere

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4
Q

Where can you not see the celestial equator?

A

Nowhere. You can see it everywhere.

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5
Q

If the earth didn’t spin, could you define the ecliptic?

A

Yes… the ecliptic is defined by the earth’s revolution, not its rotation.

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6
Q

How would the seasons change if the earth’s tilt was 90 degrees

A

Only have winter and summer, they’d be super long.

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7
Q

What would change if the earth didn’t have an atmosphere?

A

Stellar scintillaiton & northern lights

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8
Q

Planesphere

A

Plots the stars for any date and time

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9
Q

Companion to Sirius A

A

Sirius B

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10
Q

Optical double in the bears tail

A

Mizar & Alcor

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11
Q

Shoulder of the hunter (Orion)

A

Bellatrix

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12
Q

Position of the star in the sky, not its altitude

A

azimuth

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13
Q

60 ______ per degree

A

minutes of arc

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14
Q

Puffed up old star

A

planetary neblua

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15
Q

Observer looks down

A

nadir

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16
Q

Southern constellation of peace

A

Columba (dove)

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17
Q

The twins of gemini

A

Castor and Pollux

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18
Q

NGC

A

New general catalouge

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19
Q

Compass constellation

A

Pixus

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20
Q

Separates the crab and the bull

A

Gemini

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21
Q

French comet hunter

A

Messier

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22
Q

12 hours of daylight, 12 hours of nightime

A

equinox

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23
Q

Earth’s closest to the sun (perihelion) in..

A

January

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24
Q

Head of the snake

A

Rastaban

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25
Charioteer with kids
Auriga
26
the asses feed on m44
praesepe
27
Heart of the lion
Regulus
28
Virgin's ear of wheat
Spica
29
Heartstrings of Lyra
Double double
30
romulus' view blocked by the moon
libra
31
blows in the wind of spring
coma berenices
32
Points of the summer triangle
Vega, Deneb, Altair
33
diamonds of perseus, recorded by hipparchus
double cluster
34
tail of the goat
deneb algedi
35
young horse of the summer sky
equuleus
36
double star, head of the swan
albireo
37
part of the great square not in the horse
Alpheratz
38
Faintest constellation of the zodiac
Pisces
39
First black hole
Cygnus X-1
40
the fox that hides in the summer triangle
vulpecula
41
britney of the sky
ophiuchus (serpent holder)
42
extremely quiet place by the river
eridanus supervoid
43
bright star of the southern fish
fomalhaut
44
star that drives the bear
arcturus
45
ancient remains of star, swan song
veil nebula
46
rival of mars
Antares
47
galaxies belong to stephan and pegasus
quintet
48
having a whale of a time in fall
cetus
49
Zodiac constellations of the winter
GeminiTaurusCancer
50
Zodiac constellations of the summer
CapricornSagittariusScorpio
51
Zodiac constellations of the spring
VirgoLeoLibra
52
Zodiac signs of the fall sky
PiscesAriesAquarius
53
Stars of Orion's belt
AlnitakAlnilamMintaka
54
Closest star forming region to the earth
Orion nebula
55
Important stars of Taurus
Aldebaran (eye of the bull)Pleiades
56
1st pulsating star
crab nebula
57
What is produced when stars die?
Gold
58
Major Stars in Canis Major
Sirius (brightest star in the winter sky)
59
Sirius means
"scorching"
60
What are the three types of clusters?
1. globular2. open3. associations (dozen stars or less, not enough gravity to hold together)
61
Important stars in Gemini
PolluxCastor
62
Important stars in Cancer
Northern association & Southern association...seperated by the praesepe
63
Important stars in Cygnus
Deneb "tail of the swan"Alberio = double stars orbiting each other
64
First star to have its parallax measured...
Cygni 61
65
Closest black hole to us
Cygnus x-1
66
Escape Velocity
The speed necessary for an object to completely escape the gravity of a large body such as a moon, planet, or star
67
What star will be the pole star in 10,000 years?
Vega
68
Important stars in Lyra
Vega
69
most compact globular cluster
M56
70
Important stars in Aquila
AltairDeneb Okab
71
Oldest constellation of the nightime sky?
Capricorn
72
Luckiest constellation?
Aquarius
73
Furthest thing the eye can see
M31: the andromeda galaxy
74
Important stars in Andromeda
AlpharatzAndromeda galaxy
75
1st star that has a planet orbiting
51 pegasi
76
Eclipsing Binary Stars
two stars orbiting around each other, blocking each other's light every 3&1/2 days
77
important fish in pisces
Alrisharep. the cord holding the two fish together
78
1st star to vary in brightness
Mira
79
Cetus
whale
80
Eridanus
River
81
Eridanus super void
largest known bubble in space with nothing in it & coldest spot in universe
82
major stars in leo
regulus & denebula
83
What is the main star of virgo?
Spica
84
radial component
either moving toward or away from you
85
proper motion
motion directly across your field of view
86
Barnard Star
1.5 parsecs away and moves 10.4 arc seconds per yearcannot be seen by the naked eyeIn constellation of Ophiucus
87
Hercules
1/2 mortal son of Zeus12 labors
88
Corona Borealis
Meaning: Northern CrownMajor Stars: none
89
M51
spiral galaxyfirst fuzzy object in sky people actually thought was a galaxy
90
canes venatici
hunting dogsCharles' heart
91
Corvus
crow
92
earth's true sidereal rate
23 hours 56 minutes
93
stars come up _____ minutes early each day
4
94
precession
is the top spinning motion of the earth
95
it takes _____ years for the earth to precess one revolution
26,000
96
first point of aries shifts
1 degree every 72 years
97
currently in the age of:
Pisces
98
first point of aries spends ___ years in each constellation
2100
99
stellar scintillation
twinkling of the stars
100
why do stars twinkle?
refraction of light through earths atmosphere causes light to appear to move
101
planets do not twinkle because..?
they are close to us that the twinkling is not noticeable
102
higher stars are less twinkly because
light from stars goes through less of earth's atmosphere the higher it is...low stars pass through more atmosphere so they twinkle more
103
Gaia satellite
measure parallax of stars
104
aurora borealis casued by
interaction of charged particles with earth's magnetic field
105
stellar parallax
apparent displacement of a star due to the Earth's motion around the sun
106
1 Parsec
3.26Ly = 205,000 AU
107
galactic year
time taken for the sun to orbit the galactic center = 226 million yearswe are 20 galactic years old
108
Coma Berenices
"Berenice's hair"Main Star: Diadem

Astronomy (6 decks)

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