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Astronomy > Exam 2 > Flashcards

Exam 2 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
Q

Charioteer with kids

A

Auriga

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26
Q

the asses feed on m44

A

praesepe

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27
Q

Heart of the lion

A

Regulus

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28
Q

Virgin’s ear of wheat

A

Spica

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29
Q

Heartstrings of Lyra

A

Double double

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30
Q

romulus’ view blocked by the moon

A

libra

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31
Q

blows in the wind of spring

A

coma berenices

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32
Q

Points of the summer triangle

A

Vega, Deneb, Altair

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33
Q

diamonds of perseus, recorded by hipparchus

A

double cluster

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34
Q

tail of the goat

A

deneb algedi

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35
Q

young horse of the summer sky

A

equuleus

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36
Q

double star, head of the swan

A

albireo

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37
Q

part of the great square not in the horse

A

Alpheratz

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38
Q

Faintest constellation of the zodiac

A

Pisces

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39
Q

First black hole

A

Cygnus X-1

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40
Q

the fox that hides in the summer triangle

A

vulpecula

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41
Q

britney of the sky

A

ophiuchus (serpent holder)

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42
Q

extremely quiet place by the river

A

eridanus supervoid

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43
Q

bright star of the southern fish

A

fomalhaut

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44
Q

star that drives the bear

A

arcturus

45
Q

ancient remains of star, swan song

A

veil nebula

46
Q

rival of mars

A

Antares

47
Q

galaxies belong to stephan and pegasus

A

quintet

48
Q

having a whale of a time in fall

A

cetus

49
Q

Zodiac constellations of the winter

A

(GOT CCC)GeminiOrionTaurusCancerCanis MajorCanis Minor

50
Q

Zodiac constellations of the summer

A

(CALC SSS)CygnusLyraAquilaCapricornSagittariusScorpioSummer Triangle

51
Q

Zodiac constellations of the spring

A

(CVC HOLL CBCB)LeoVirgoBootesOphiocusHerculesCorona BorealisLibraCanes VenaticiComa BerenicesCorvus

52
Q

Zodiac signs of the fall sky

A

(PAPA ACE)PegasusAndromedaPiscesAriesAquariusCetusEridanus

53
Q

Stars of Orion’s belt

A

AlnitakAlnilamMintaka

54
Q

Closest star forming region to the earth

A

Orion nebula

55
Q

Important stars of Taurus

A

Aldebaran (eye of the bull)Pleiades

56
Q

1st pulsating star

A

crab nebula

57
Q

What is produced when stars die?

A

Gold

58
Q

Major Stars in Canis Major

A

Sirius (brightest star in the winter sky)

59
Q

Sirius means

A

“scorching”

60
Q

What are the three types of clusters?

A
  1. globular2. open3. associations (dozen stars or less, not enough gravity to hold together)
61
Q

Important stars in Gemini

A

PolluxCastor

62
Q

Important stars in Cancer

A

Northern association & Southern association…seperated by the praesepe

63
Q

Important stars in Cygnus

A

Deneb “tail of the swan”Alberio = double stars orbiting each other

64
Q

First star to have its parallax measured…

A

Cygni 61

65
Q

Closest black hole to us

A

Cygnus x-1

66
Q

Escape Velocity

A

The speed necessary for an object to completely escape the gravity of a large body such as a moon, planet, or star

67
Q

What star will be the pole star in 10,000 years?

A

Vega

68
Q

Important stars in Lyra

A

Vega

69
Q

most compact globular cluster

A

M56

70
Q

Important stars in Aquila

A

AltairDeneb Okab

71
Q

Oldest constellation of the nightime sky?

A

Capricorn

72
Q

Luckiest constellation?

A

Aquarius

73
Q

Furthest thing the eye can see

A

M31: the andromeda galaxy

74
Q

Important stars in Andromeda

A

AlpharatzAndromeda galaxy

75
Q

1st star that has a planet orbiting

A

51 pegasi

76
Q

Eclipsing Binary Stars

A

two stars orbiting around each other, blocking each other’s light every 3&1/2 days

77
Q

important fish in pisces

A

Alrisharep. the cord holding the two fish together

78
Q

1st star to vary in brightness

A

Mira

79
Q

Cetus

A

whale

80
Q

Eridanus

A

River

81
Q

Eridanus super void

A

largest known bubble in space with nothing in it & coldest spot in universe

82
Q

major stars in leo

A

regulus & denebula

83
Q

What is the main star of virgo?

A

Spica

84
Q

radial component

A

either moving toward or away from you

85
Q

proper motion

A

motion directly across your field of view

86
Q

Barnard Star

A

1.5 parsecs away and moves 10.4 arc seconds per yearcannot be seen by the naked eyeIn constellation of Ophiucus

87
Q

Hercules

A

1/2 mortal son of Zeus12 labors

88
Q

Corona Borealis

A

Meaning: Northern CrownMajor Stars: none

89
Q

M51

A

spiral galaxyfirst fuzzy object in sky people actually thought was a galaxy

90
Q

canes venatici

A

hunting dogsCharles’ heart

91
Q

Corvus

A

crow

92
Q

earth’s true sidereal rate

A

23 hours 56 minutes

93
Q

stars come up _____ minutes early each day

A

4

94
Q

precession

A

is the top spinning motion of the earth

95
Q

it takes _____ years for the earth to precess one revolution

A

26,000

96
Q

first point of aries shifts

A

1 degree every 72 years

97
Q

currently in the age of:

A

Pisces

98
Q

first point of aries spends ___ years in each constellation

A

2100

99
Q

stellar scintillation

A

twinkling of the stars

100
Q

why do stars twinkle?

A

refraction of light through earths atmosphere causes light to appear to move

101
Q

planets do not twinkle because..?

A

they are close to us that the twinkling is not noticeable

102
Q

higher stars are less twinkly because

A

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
Q

Gaia satellite

A

measure parallax of stars

104
Q

aurora borealis casued by

A

interaction of charged particles with earth’s magnetic field

105
Q

stellar parallax

A

apparent displacement of a star due to the Earth’s motion around the sun

106
Q

1 Parsec

A

3.26Ly = 205,000 AU

107
Q

galactic year

A

time taken for the sun to orbit the galactic center = 226 million yearswe are 20 galactic years old

108
Q

Coma Berenices

A

“Berenice’s hair”Main Star: Diadem

Astronomy (6 decks)

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