Astrnomy Flashcards

(21 cards)

1
Q

Axis

A

An imaginary line running through the centre of the Earth from north to south about which the Earth rotates

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2
Q

Eclipse

A

An eclipse occurs when a body in space blocks the light of the sun for a short while.

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3
Q

Far side

A

The far side of the moon. It is never seen from Earth because the moon takes about the same time to spin around once as it does to orbit the earth

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4
Q

Full moon

A

The view of the moon seen from the Earth when the whole of its near side is in sunlight

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5
Q

Galaxy

A

A very large group of stars held together as a system by gravity

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6
Q

Gravitational attraction

A

An attraction that exists between any two bodies in the universe that have mass

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7
Q

Gravity

A

The force of attraction that exists between any two bodies in the universe that have mass

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8
Q

Lunar eclipse

A

When the Earth passes between the sun and the moon

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9
Q

Mass

A

The quantity of matter in an object (often measured in kilograms).

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10
Q

Near side

A

The near side of the moon which is the side we always see form Earth

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11
Q

New Moon

A

A phase of the moon that occurs when the part facing the Earth is facing away from the sun.

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12
Q

Penumbra

A

The lighter part of a shadow

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13
Q

Phases of the moon

A

Eight different shapes the moon seems to have(when viewed from Earth) while it completes one orbit of the Earth

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14
Q

Revolution

A

One complete orbit of a body around another body

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15
Q

Revolves

A

What a body (e.g. the Moon) does when it moves right around, or orbits, another body (e.g. the Earth and Sun).

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16
Q

Rotation

A

One complete turn by a body around its imaginary axis. Such a body (e.g. the Earth) is said to rotate on its axis

17
Q

Season

A

One of four equal periods into which a year is, resulting from the apparent movement of the sun north and south of the equator during a he courageous of the earth’s orbit around it.

18
Q

Solar eclipse

A

A solar eclipse occurs when the moon passes between the sun and earth

19
Q

Umbra

A

The darker central part of a shadow

20
Q

Orbit

A

The movement of an object following a curved path around another object. For example, the Moon orbits the Earth

21
Q

Heliocentric

A

A model of the solar system where the Sun is at the centre