astronomy Flashcards

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1
Q

astronomy

A

study the space

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2
Q

year

A

thee time required for the earth to orbit once around the sun

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3
Q

month

A

a division of the year that is based on the orbit of the moon around the earth

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4
Q

day

A

the time required for the earth to rotate once on its axis

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5
Q

telescope

A

an instrument that collects electromagnetic radiation

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6
Q

refracting telescope

A

a telescope that uses a set of lens

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7
Q

reflecting telescope

A

a telescope that uses a curved mirror to gather and

focus light

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8
Q

electromagnetic spectrum

A

all of the frequencies or wavelengths

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9
Q

constellation

A

a region of the sky that contains a recognizable star pattern and that is used to describe the location of
objects in space.

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10
Q

zenith

A

the point in the sky directly above an observer on earth

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11
Q

altitude

A

the angle between an object in sky and the horizon

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12
Q

horizon

A

the line where the sky and the earth appear to meet

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