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Undeleted > Astronomy current unit > Flashcards

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
Q

Mare:

A

Lava filled crater

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26
Q

Impact crater:

A

Meteor crashes & leaves a hole

27
Q

Eclipse:

A

One thing blocks another & casts a shadow

28
Q

Umbra:

29
Q

Penumbra:

30
Q

Solar eclipse:

A

Suns blocked out

31
Q

Lunar eclipse:

A

Moons blocked out

32
Q

Waxing:

A

Growing/right side light up

33
Q

Waning:

A

Shrinking/left side light up

34
Q

How did the moon form?

A

Small planet crashed into earth & knocked the top off

35
Q

Spring tide:

A

Extra high, high tide

Extra low, low tide

36
Q

Neap tide:

A

Not high/not low-even

37
Q

Astronomical unit:

A

Earths distance from the sun/93 million miles

38
Q

Ellipse:

A

Flattened circle or oval

39
Q

Terrestrial planet:

A

Earth like/4 planets closest to the sun

40
Q

Tectonics:

A

Mantle moves from under the crust

41
Q

Volcanism:

A

When the mantle goes up onto the surface

42
Q

Gas giant:

A

Hydrogen & helium

43
Q

Ring:

A

Ice chunks

44
Q

Asteroid:

A

Regular/space rock that orbits the sun

45
Q

Comet:

A

Irregular/made of ice & rock

46
Q

Meteor:

A

Burning in the atmosphere

47
Q

Meteoroid:

A

Rock in space

48
Q

Meteorite:

A

Space rock that landed

49
Q

Why are some space objects potato shaped?

A

They don’t have enough mass for gravity to pull on the edges

50
Q

Fusion:

A

2 atoms combined to make a new one

51
Q

Convection:

A

Heat rises, cool sinks

52
Q

Corona:

A

Outermost layer, hottest layer of the atmosphere

53
Q

Sunspot:

A

Cooler spots on the photosphere

54
Q

Solar wind:

A

Stream of electrically charged particles that follows out in all directions

55
Q

Light year:

A

The distance light travels in 1 year

56
Q

Parallax:

A

Apparent jump

57
Q

Nebula:

A

Cloud of gas & dust

58
Q

Main sequence:

A

Fusing hydrogen into helium

59
Q

Neutron star:

A

12 miles wide/super dense

60
Q

Black hole:

A

Collapsed neutron star

61
Q

Quasar:

A

Seeming like a star, bright center of a distant galaxy

62
Q

Doppler effect:

A

When wavelengths get stretched or squeezed

63
Q

Big band theory:

A

When the universe started to expand out of an extremely hot, dense, state

64
Q

Bread dough theory:

A

As the bread rises, the raisins get further apart

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