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Science😝 > Astronomy > Flashcards

Astronomy Flashcards

(65 cards)

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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
Waining then waxing
Smaller than bigger
26
The distance between the earth and the moon varies in provided by the apparent change in the moons
Diameter
27
The revolution of the moon around the earth is
The motion that causes the moon to show phases
28
The actual orbits of the planets are
Elliptical with the sun at one of the foci
29
The moon has a ******** force of gravity than the earth
Weaker
30
What’s the reason the earth revolves around the sun
Gravitational force
31
Cosmetic background information
Evidence to prove the Big Bang theory
32
Name the planets
MVEMJSUNP
33
Terrestrial planets vs Jovian planets
Inner plants are closer to each other Inner are small dense and rocky Outer planets are mostly gas The outer planets are larger
34
Asteroid
Small rocky body orbiting the sun
35
Axis of rotation
Straight line through all fixed points of a rotating rigid body around which all the other points of the body move in circles
36
Comet
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
Eclipse
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
Equator
An imaginary line drawn around the earth
39
Equinox
The time or date when the sun crosses the celestial equator when day and night are of equal length (9/22-3/20)
40
Meteoroid
A small body moving in the solar system that would become a meteor if it entered earths atmosphere
41
Moon
Natural satellite of the earth visible by reflected light of the sun
42
Moon phase
The shape of the moon is the shape of the directly sunlit portion of the moon as seen by earth
43
Orbit
The curved path of a celestial object of spacecraft around a star planet or moon
44
Revolve
Move in a circle on a central axis
45
Rotate
Move or cause to move in a circle around an axis or center
46
Solar system
The collection of eight planets and their moons in orbit around the sun also including asteroids meteoroids and comets
47
Spherical
Shaped like a sphere
48
Star
Large ball of gas
49
Summer solstice
The solstice that marks the onset of summer
50
Tides
The alternative rising and falling of the sea usually twice each lunar day at a particular place
51
Winter solstice
The solstice that marks the onset of winter
52
Cosmology
The study of the origin and future of the universe
53
Big Bang Theory
States that the universe began with a tremendous explosion
54
H-R diagram
Graph showing the relationship between a stars surface temperature and its absolute magnitude
55
Main Sequence
A diagonal pattern of stars on the H-R diagram
56
White dwarf
A small hot star near the end of its life the leftover center of an old star
57
Red giant
A star that expands and cools once it is out of hydrogen and fuel
58
Supernova
The death of a large star by expansion
59
Neutron star
A star in which all the particles have become neurons the collapsed remains of supernova
60
Black hole
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
Astronomical unit
The average distance between the earth and the sun, or approximately 150,000,000km
62
Terrestrial planets
The small dense rocky planets of the inner solar system
63
Jovian planets
Gas giants | The large gaseous planets of the outer solar system
64
Meteorite
A very small rocky body that revolves around the sun
65
Meteor
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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