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astronomy > quiz 1 > Flashcards

quiz 1 Flashcards

1
Q

astronomical unit

A

avg distance between earth and sun

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2
Q

how big is an astronomical unit

A

150B km or 93M mi

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3
Q

light year

A

the distance light travels in one year

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4
Q

Olaus Roemer

A

Danish astronomer that first measured the speed of light based on observations of eclipses of the moons of jupiter

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5
Q

how big is a light year

A

5.88T mi/yr or 10T km/yr

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6
Q

how many times does light go around earth on 1s

A

7.5x

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7
Q

diameter of earth

A

8k mi

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8
Q

circumference of earth

A

40k km or 25k mi

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9
Q

North star name

A

polaris

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10
Q

how far away is Polaris

A

400ly

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11
Q

parsec

A

describes distances between galaxies

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12
Q

how big is a parsec

A

3.26ly

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13
Q

what is the universe made of (4)

A

matter space energy time

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14
Q

constellation

A

an apparent arrangement of stars that make recognizable patterns

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15
Q

galaxy

A

a gravitational bound collection of a ginormous number of stars planets and natural satellites

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16
Q

astrology

A

a method to determine one’s destiny

17
Q

degrees of hand outstretched

A

20

18
Q

degrees of pointer to pinky

A

15

19
Q

degrees of fist

A

10

20
Q

degree of thumb

A

1

21
Q

how many degrees is the full moon and sun

A

.5

22
Q

angular distance

A

apparent angular spacing between 2 objects in the sky

23
Q

zenith

A

point on celestial sphere located directly above the observer

24
Q

latitude directions

A

n and s

25
Q

longitude directions

A

e and w

26
Q

how many degrees is earth tilted on axis

A

23.5

27
Q

how many miles away from sun is earth in winter

A

91.3M

28
Q

how many miles away from sun is earth in summer

A

94.5M

29
Q

Vernal equinox

A

March 21

30
Q

summer solstice

A

June 21

31
Q

autumnal equinox

A

September 21

32
Q

winter solstice

A

December 21

33
Q

Tropic of Capricorn degrees

A

23.5 S

34
Q

Tropic of cancer degrees

A

23.5 N

astronomy (12 decks)

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