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Unformatted text preview: art as possible. They accomplish this by observing the apparent
displacement of a star against the background of more distant stars
resulting from the change of the Earth’s position in orbit. The
parallax angle is exaggerated in the picture below. ≅ θ θ θ Parallax and Depth Perception (cont.)
The picture is not to scale. The diameter of Earth’s orbit is very small
compared to the distance of the star being measured, which in turn
is very small compared to the distance of the background stars. For
this reason the angular displacement of points A and B, as seen
from Earth at any point in its orbit, is almost exactly the same as the
Problem: Back on Earth Schmedrick attempts to figure out how far
away a certain distant star is. He figures out a 2 degree parallax
angle from two different observations made during the earth’s
period. How far away is the star? (Earth 93 million miles from the
sun.) Solution on next slide. A 2o B Parallax and Depth Perception (cont.)...
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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