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An arc second is a measure of angular separation, not of distance. It is therefore an inappropriate unit for measuring the distance to a star.

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Q: How many arc seconds away is Vega?
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What actors and actresses appeared in Arc to Vega - 2008?

The cast of Arc to Vega - 2008 includes: John DeFazio


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60


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which power of a telescope might be expressed as "0.5 seconds of arc"?


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