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Ch 18 Vocab
Astromomy
| Term | Definition |
|---|---|
| Astronomy | the study of the universe |
| Year | the time required for the Earth to Orbit once around the sun |
| Month | a division of the year that is based on orbit of the moon around the earth |
| Day | the time required for Earth to rotate once on its axis |
| Telescope | an instrument that collects electromagnetic radiation from the sky and concentrates it for better observation |
| Refracting telescope | a telescope that uses a set of lenses to gather and focus light from distant objects |
| Reflecting telescope | a telescope that uses a curved mirror to gather and focus light from distant objects |
| Electromagnetic spectrum | all of the frequencies or wavelengths of electromagnetic radiation |
| Constellation | a region of the sky that contains a recognizable star pattern and that is used to describe the location of objects in space |
| Zenith | the point in the sky directly above an observer on Earth |
| Altitude | the angle between an object in the sky and the horizon |
| Horizon | the line where the sky and the Earth appear to meet |
| Light year | the distance that light travels in one year; about 9.46 trillion kilometers |
Created by:
Cody J
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