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Flashcards in SPACE Deck (34):
1

Orbit

The path of an object in space as it moves around object due to gravity

2

Solar system

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

3

Galaxy

Millions and billions of stars held together in a group by their own gravity

4

Universe

Space and all the matter and energy in it

5

Tide

The rise and fall of the oceans caused by gravitational pull of the moon and sun

6

Satellite

An object that orbits a more massive object

7

Impact crater

A round pit left behind on the surface of a planet after a smaller object strikes the surface

8

Axis of rotation

An imaginary line about which a turning body such as Earth rotates

9

Revolution

The motion of one body around, such as the Earth in its orbit around the sun

10

Season

One of a pattern of temperature changes and other weather trends over the course of a year

11

Equinox

In an orbit a position and time in which sun shines equally on both hemispheres

12

Solstice

In orbit, a position and time during which one hemisphere receives the maximum sunlight

13

Mari

A large dark plain of solidified lava on the moon

14

An event during which one object in space caste a shadow onto another

Eclipse

15

Umbra

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

16

A region of lighter shadow that may surround a dark central region

Pinumbra

17

AU astronomical

Average distance from the sun which is 93,000,000

18

An oval or flattened circle

Olips

19

Terrestrial planet

A planet that has a rocky surface

20

Gas giant

A large planet that consist mostly of gases in a dense form

21

Asteroid

Small rocky body that orbits the sun

22

Comit

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

23

Meteor

A brief streak of light produced by a particle entering Earths atmosphere at high speed

24

Meteorite

A small object from outer space that passes through Earths atmosphere and reaches the surface

25

Geocentric

Earth centered theory of the solar system

26

A sun centered theory of the universe

Heliocentric

27

The force that objects exert on one another because of their mass

Gravity

28

Waxing

The gradual increase of the illumination surface of the moon

29

Waning

The gradual decrease in the illuminated surface of the moon

30

Gibbous

More than half but less than fully illuminated

31

Crescent

The illuminated surface is less than half

32

Full moon

The entire suface is illuminated

33

New moon

The entire suface of the moon is not illuminated

34

Half moon

Half of the moon is illuminated