Earth Science terms to know
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- Who was the first astronomer to build a telescope for viewing the heavens?
- Galileo.
- What does the word "refract" mean?
- to bend
- What are three functions of a telescope?
- light gathering, magnification, and resolution
- What does a refractor telescope use to accomplish these three functions?
- lenses.
- What is the color distortion caused by lenses called?
- chromatic abberation
- Name a common type of nonoptical telescope in use on the earth today.
- radio telescope (x-ray telescope)
- How can nonoptical telescope detect the kind of radiation that is filtered out by the atmosphere?
- nonoptical telescopes can detect radiation that is filtered out by the atmosphere because they are placed above the atmosphere by ballons, rockets, or airplanes.
- LIst two types of telescope mounts.
- equatorial and altazimuth
- How are images from optical telescopes recorded?
- on photographic film
- How are images from nonoptical telescopes usually recorded?
- on magnetic tape or strip charts
- What two methods do astronomers have for describing where in the sky an object may be found.
- using constellations; using coordinates
- An area in the sky with imaginary boundaries running north, south, east, and west is called by what name?
- a constellation
- Who introduced an orderly system for identifying particular stars within a constellation?
- John Bayer
- How many constellations are there?
- eighty-eight
- How did Bayer generally designate the brightest star in a constellation?
- by assigning the greek letter Alpha the the Latan name of the constellation.