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Science😝 > Astronomy > Flashcards

Astronomy Flashcards

1
Q

Arctic Circle

A

66.5°. North, top of the globe. ( total darkness on December 21)

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2
Q

Tropic of Cancer

A

23.5° north June 21 sun is overhead at noon

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3
Q

Tropic of Capricorn

A

23.5° south December 21 sun over head at noon

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4
Q

Antarctic circle

A

66.5° south bottom of the globe total darkness at noon June 21

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5
Q

What do stars produce?

A

Light
Heat
Ultraviolet radiation

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6
Q

Blue Giants

A

Brightest stars

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7
Q

Red stars

A

Coolest stars

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8
Q

Compared to a red dwarf a white dwarf is…

A

Hot

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9
Q

Compared to a red dwarf a red giant is…

A

Bright

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10
Q

What size star is our sun

A

Average

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11
Q

The planets stay in orbit around the sun because of…

A

Ellipse

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12
Q

Jupiter is a

A

Jovian planet

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13
Q

The moon revolves around the earth every

A

27 and 1/3 days

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14
Q

Most stars appear to

A

Rise in the east and set in the West

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15
Q

Earth rotates every

A

24 hours

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16
Q

Earth revolves around the sun every

A

365 1/4 days

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17
Q

Longitude

A

Up down

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18
Q

Latitude

A

Side to side

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19
Q

In graphing which goes first?

A

Latitude then longitude

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20
Q

When the sun is highest in the sky the shadows are

A

Short

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21
Q

In the winter the shadows are

A

Long

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22
Q

Lights up and then darkens

A

Clockwise

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23
Q

When the moon is in between the sun and the earth the moon phase is a

A

New

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24
Q

What causes the moon to show phases when viewed on earth

A

Revolution on the moon

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25
Q

Waining then waxing

A

Smaller than bigger

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26
Q

The distance between the earth and the moon varies in provided by the apparent change in the moons

A

Diameter

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27
Q

The revolution of the moon around the earth is

A

The motion that causes the moon to show phases

28
Q

The actual orbits of the planets are

A

Elliptical with the sun at one of the foci

29
Q

The moon has a ** force of gravity than the earth

A

Weaker

30
Q

What’s the reason the earth revolves around the sun

A

Gravitational force

31
Q

Cosmetic background information

A

Evidence to prove the Big Bang theory

32
Q

Name the planets

A

MVEMJSUNP

33
Q

Terrestrial planets vs Jovian planets

A

Inner plants are closer to each other
Inner are small dense and rocky
Outer planets are mostly gas
The outer planets are larger

34
Q

Asteroid

A

Small rocky body orbiting the sun

35
Q

Axis of rotation

A

Straight line through all fixed points of a rotating rigid body around which all the other points of the body move in circles

36
Q

Comet

A

A celestial object consisting of a nucleus of ice and dust, when it is near the sun it has a tail that goes away from it

37
Q

Eclipse

A

an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination

38
Q

Equator

A

An imaginary line drawn around the earth

39
Q

Equinox

A

The time or date when the sun crosses the celestial equator when day and night are of equal length (9/22-3/20)

40
Q

Meteoroid

A

A small body moving in the solar system that would become a meteor if it entered earths atmosphere

41
Q

Moon

A

Natural satellite of the earth visible by reflected light of the sun

42
Q

Moon phase

A

The shape of the moon is the shape of the directly sunlit portion of the moon as seen by earth

43
Q

Orbit

A

The curved path of a celestial object of spacecraft around a star planet or moon

44
Q

Revolve

A

Move in a circle on a central axis

45
Q

Rotate

A

Move or cause to move in a circle around an axis or center

46
Q

Solar system

A

The collection of eight planets and their moons in orbit around the sun also including asteroids meteoroids and comets

47
Q

Spherical

A

Shaped like a sphere

48
Q

Star

A

Large ball of gas

49
Q

Summer solstice

A

The solstice that marks the onset of summer

50
Q

Tides

A

The alternative rising and falling of the sea usually twice each lunar day at a particular place

51
Q

Winter solstice

A

The solstice that marks the onset of winter

52
Q

Cosmology

A

The study of the origin and future of the universe

53
Q

Big Bang Theory

A

States that the universe began with a tremendous explosion

54
Q

H-R diagram

A

Graph showing the relationship between a stars surface temperature and its absolute magnitude

55
Q

Main Sequence

A

A diagonal pattern of stars on the H-R diagram

56
Q

White dwarf

A

A small hot star near the end of its life the leftover center of an old star

57
Q

Red giant

A

A star that expands and cools once it is out of hydrogen and fuel

58
Q

Supernova

A

The death of a large star by expansion

59
Q

Neutron star

A

A star in which all the particles have become neurons the collapsed remains of supernova

60
Q

Black hole

A

An object with more than 3 solar masses squeezed into a ball only 10km across, whose gravity is so strong that not even light can escape

61
Q

Astronomical unit

A

The average distance between the earth and the sun, or approximately 150,000,000km

62
Q

Terrestrial planets

A

The small dense rocky planets of the inner solar system

63
Q

Jovian planets

A

Gas giants

The large gaseous planets of the outer solar system

64
Q

Meteorite

A

A very small rocky body that revolves around the sun

65
Q

Meteor

A

A streak of light caused when a meteoroid or comet, dust burns up in the Earths atmosphere before it reaches the ground

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