Astronomy Vocabulary Set #1

14 terms by RJRogers

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astronomy

the study of the universe

day

time for Earth to make a complete rotation on its axis

eclipse

an event in which the shadow of one celestial body falls on another

electromagnetic spectrum

all of the frequencies or wavelengths of electromagnetic radiation; all of the forms of energy released from the sun

month

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

orbit

the path that a body follows as it travels around another body in space

phase

the change in the sunlit or illuminated area of one celestial body as seen from another celestial body

reflecting telescope

a telescope that uses a curved mirror to gather and focus light from distant objects

refracting telescope

a telescope that uses a set of lenses to gather and focus light from distant objects

revolution

the motion of a body that travels around another body in space; one complete trip along an orbit

rotation

the spin of a body on its axis

satellite

a natural or artificial body that revolves around a planet

telescope

an instrument that collects electromagnetic radiation from the sky and concentrates it for better observation

year

the time required for Earth to revolve once around the sun

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