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Unformatted text preview: degrees in a year). What is happening in space is shown in Figure 2. Seen against a background of 7 distant stars, the near star is first at point P, aligned with star 2, then at later time (years later) at point Q, aligned with star 6. The stars that exhibit proper motion are always those that are relatively near to us, and their motion seen relative to distant stars. "Near" in this context means from a few light years out to a few tens of light years. The distant stars may be millions of light years away. Great patience and diligence is required to study this motion. One must be assured that the telescope is in exactly the same position and orientation consistently over a period of years, even decades....
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- Fall '10
- Astronomy, Planet, proper motion