Solar Seystem Flashcards

1
Q

Orbit

A

repeating path that one object in space takes around another one

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2
Q

Crescent moon

A

a curved shape that is wider in the middle than at its ends

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3
Q

Revolution

A

a complete, 360-degree turn or rotation

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4
Q

Gravity

A

A body that attracts other ones

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5
Q

Wanning

A

Unnaturally pale

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6
Q

Meteor

A

A streak of light

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7
Q

Quarter moon

A

The moon is a quarter lit

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8
Q

Comet

A

a celestial object consisting of a nucleus of ice and dust

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9
Q

Galaxy

A

a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity

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10
Q

Season

A

a single, dominant repeating pattern of fixed frequency

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11
Q

Heliocentric

A

having or representing the sun as the center, as in the accepted astronomical model of the solar system

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12
Q

terrestrial planet

A

Earth-like planets made up of rocks or metals with a hard surface

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13
Q

Meteor

A

a small body of matter from outer space that enters the earth’s atmosphere, becoming incandescent as a result of friction and appearing as a streak of light

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14
Q

Equinox

A

the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length

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15
Q

Geocentric

A

having or representing the earth as the center, as in former astronomical systems

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16
Q

Astronomical Unit

A

a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun

17
Q

Full Moon

A

an object that orbits a planet or another celestial body that is not a star

18
Q

Eclipse

A

occurs when one heavenly body such as a moon or planet moves into the shadow of another heavenly body

19
Q

Tide

A

very long-period waves that move through the ocean in response to the forces exerted by the moon and sun

20
Q

Asteroid

A

a small rocky body orbiting the sun. Large numbers of these, ranging in size from nearly 600 miles

21
Q

Waxing

A

increasing, or becoming larger in size

22
Q

Quarter Moon

A

When half of the Moon’s disc is illuminated

23
Q

Umbra

A

that part of a shadow in which all light from a given source is excluded

24
Q

Penumbra

A

space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light

25
Q

Solstice

A

the time or date (twice each year) at which the sun reaches its maximum or minimum declination, marked by the longest and shortest days

26
Q

New Moon

A

the phase of the moon when it is in conjunction with the sun and invisible from earth, or shortly thereafter when it appears as a slender crescent

27
Q

Meteorite

A

a streak of light in the sky caused by a meteoroid crashing through Earth’s atmosphere

28
Q

Impact Crater

A

a crater on a planet or moon caused by the impact of a meteorite or other object, typically circular with a raised rim

29
Q

Satellite

A

an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication

30
Q

Gibbous Moon

A

Waxing Gibbous: The waxing gibbous phase is between a half moon and full moon

31
Q

Crescent Moon

A

the shape of a moon that is less than half-illuminated

32
Q

Mare

A

the female of a horse or other equine animal

33
Q

Universe

A

all existing matter and space considered as a whole; the cosmos. The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies

34
Q

Orbit

A

the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution