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Unformatted text preview: aves and little is known
about them other than they are very harmful to living cells and are used
by doctors to kill certain cells and for other operations. They are
produced in nuclear explosions. Like other high energy rays, our
atmosphere protects us from gamma rays.
Astronomers have many different types of telescopes at their disposal to
observe the universe in all parts of electromagnetic spectrum. Some
Arecibo Spitzer Hubble Keck Compton Parallax and Depth Perception Parallax is any alteration in the apparent position of an object due to
a change in the position of the observer. A simple demonstration of
this effect can be seen by extending your thumb at arm’s length.
Then close one eye at a time and note how your thumb appears to
jump left and right relative to the background. Now move your
thumb closer and note how the jump is greater. This technique can
be used in astronomy to find a star’s distance from Earth. For
distant objects like stars, astronomers must move their “eyes” as far
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This note was uploaded on 11/17/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.
- Fall '11