Astronomy current unit Flashcards

1
Q

Panet:

A

Anything that orbits a star.

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2
Q

Solar system:

A

The sun, planets, & various smaller bodies.

Star with planets

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3
Q

Galaxy:

A

A group of millions, or billions of stars held together by their own gravity.

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4
Q

Universe:

A

Everything-Space & all the matters & energy in it.

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5
Q

Orbit:

A

Path of an object in space as it moves around another object because of gravity.

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6
Q

Constellation:

A

A group of stars that form a patter in the sky.

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7
Q

Electromagnetic Radiation:

A

Energy that travels across distances as certain types of waves/Energy from the sun.

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8
Q

Telescope:

A

A device that gathers electromagnetic radiation.

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9
Q

Reflecting telescope:

A

Uses mirrors

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10
Q

Refracting telescope:

A

Uses lenses

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11
Q

Spectrum:

A

A range of wavelengths.

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12
Q

Wavelength:

A

The distance between two peeks.

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13
Q

Satellite:

A

An object that orbits a more massive object.

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14
Q

International Space Station:

A

Orbits the earth/satellite in which people live & work for long periods of time.

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15
Q

Lander:

A

Lands & collects samples

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16
Q

Probe:

A

Measures atmosphere before it explodes

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17
Q

Orbiter:

A

Maps the surface

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18
Q

Flyby:

A

Flys past planets & takes pictures

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19
Q

Impact crater:

A

A whole in the ground from an exploding space rock.

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20
Q

Axis of rotation:

A

Imaginary line that runs through the N & S pole

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21
Q

Revolution:

A

Orbit

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22
Q

Season:

A

Weather pattern

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23
Q

Equinox:

A

Equal amount of sunlight in each hemisphere

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24
Q

Solstice:

A

Max. & Min. amount of sunlight, one gets max., one gets min.

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25
Mare:
Lava filled crater
26
Impact crater:
Meteor crashes & leaves a hole
27
Eclipse:
One thing blocks another & casts a shadow
28
Umbra:
Dark
29
Penumbra:
Light
30
Solar eclipse:
Suns blocked out
31
Lunar eclipse:
Moons blocked out
32
Waxing:
Growing/right side light up
33
Waning:
Shrinking/left side light up
34
How did the moon form?
Small planet crashed into earth & knocked the top off
35
Spring tide:
Extra high, high tide Extra low, low tide
36
Neap tide:
Not high/not low-even
37
Astronomical unit:
Earths distance from the sun/93 million miles
38
Ellipse:
Flattened circle or oval
39
Terrestrial planet:
Earth like/4 planets closest to the sun
40
Tectonics:
Mantle moves from under the crust
41
Volcanism:
When the mantle goes up onto the surface
42
Gas giant:
Hydrogen & helium
43
Ring:
Ice chunks
44
Asteroid:
Regular/space rock that orbits the sun
45
Comet:
Irregular/made of ice & rock
46
Meteor:
Burning in the atmosphere
47
Meteoroid:
Rock in space
48
Meteorite:
Space rock that landed
49
Why are some space objects potato shaped?
They don't have enough mass for gravity to pull on the edges
50
Fusion:
2 atoms combined to make a new one
51
Convection:
Heat rises, cool sinks
52
Corona:
Outermost layer, hottest layer of the atmosphere
53
Sunspot:
Cooler spots on the photosphere
54
Solar wind:
Stream of electrically charged particles that follows out in all directions
55
Light year:
The distance light travels in 1 year
56
Parallax:
Apparent jump
57
Nebula:
Cloud of gas & dust
58
Main sequence:
Fusing hydrogen into helium
59
Neutron star:
12 miles wide/super dense
60
Black hole:
Collapsed neutron star
61
Quasar:
Seeming like a star, bright center of a distant galaxy
62
Doppler effect:
When wavelengths get stretched or squeezed
63
Big band theory:
When the universe started to expand out of an extremely hot, dense, state
64
Bread dough theory:
As the bread rises, the raisins get further apart