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Q & A: Light from a moving star?

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Most recent answer: 04/02/2012
Q:
I don't even know if I can ask this question correctly however I'm going to give it a go. If I am looking at any particular star in the night sky, is that the actual position of said star, or am I only seeing the position of the star at which time the light left it and depending on how long it took that light to reach earth is that star somewhere else entirely than when I am viewing it?
- Daniel Brown (age 45)
Decatur, Il. USA
A:
The second of your suggestions is the correct one.    It's similar to the effect when a fast jet passes nearby and the sound seems to come from behind its visual position. 

LeeH

(published on 04/02/2012)

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