Space Flashcards

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1
Q

Solar system

A

The sun and its family of orbiting planets, moons, and other objects.

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2
Q

Galaxy

A

Billions of stars held together in a group by their gravity.

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3
Q

Universe

A

Space and all the matter and energy in it.

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4
Q

Satellite

A

An object that orbits a more massive object.

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5
Q

Impact crater

A

A round pit left behind on the surface of a planet or other body in space after a smaller object strikes it surface.

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6
Q

Axis of rotation

A

An imaginary line which a turning body, such as earth rotates

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7
Q

Revolution

A

The motion of one body around another, such as earth in its orbit around the sun. The time it takes an object to go around once.

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8
Q

Season

A

A part of a pattern of temperatures changes and other weather trends over the year. They are caused by the position of the earth to the sun.

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9
Q

Equinox

A

In an orbit, a position and time in which sunlight shines equally on the Northern and Southern Hemisphere. A time of the year when daylight and darkness are nearly equal for most of the earth.

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10
Q

Solstice

A

In an orbit, a position and time which one hemisphere has maximum light and the other has minimum amount.

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11
Q

Mare

A

A large dark plain of solidified lava on the moon

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12
Q

Eclipse

A

An event during which one object in space casts a shadow on another

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13
Q

Umbra

A

The dark central region of a shadow, such as the cone of the complete complete shadow cast of an object

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14
Q

Penumbra

A

A region of lighter shadow that may surround an umbra

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15
Q

Astronomical unit (AU)

A

Earths average distance from the sun which is 150 million kilometers

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16
Q

Ellipse

A

An oval or flattened circle

17
Q

Terrestrial planet

A

Earth or a planet similar to earth that has a rocky surface. Mercury, Venus, Mars and earth are examples

18
Q

Gas giant

A

A large planet that consists of mostly gases in a dense form. Jupiter, Saturn, Uranus, and Neptune are examples.

19
Q

Asteroid

A

A small rock that orbits the sun.

20
Q

Geocentric

A

Earth centered solar system

21
Q

Heliocentric

A

Sun centered solar system. Us.

22
Q

Comet

A

A small, icy body that orbits the earth that produces a coma of gas and dust.

23
Q

Meteor

A

A brief streak of light produced by a small particle

24
Q

Meteorite

A

A small object from space that passes through earths atmosphere

25
Q

Gravity

A

The force that objects exert on each other because of there mass

26
Q

Tides

A

The rising and fallen of the waves because of the moon.

27
Q

Waxing

A

The moon phases that are closer to the new moon and full moon. They are gradually increasing

28
Q

Waning

A

The moon phases closer to the full moon and new moon. There are gradually decreasing

29
Q

Gibbous moon

A

The moon phases before and after the full moon.

30
Q

Crescent moon

A

The phases before and after the new moon

31
Q

Full moon

A

The phase when you can see the moon completely

32
Q

New moon

A

The phase when you can barely see the moon because it’s completely black

33
Q

Quarter moon

A

The phases that are half way to and from the full moon and the new moon.

34
Q

Orbit

A

The path of an object in space as it around another object due to gravity. Example: the Moon and Earth.