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Old 30-08-2010, 10:43 PM
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Blue Skies (Jacquie)
It's about time

Blue Skies is offline
 
Join Date: Nov 2005
Location: Melbourne
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Quote:
Originally Posted by mikemasey View Post
So '0' is the bench mark, is that corect and what is the mark. Not the moon as that is far to bright?
Yes, although it is an open-ended scale. If you read the article that Andrew links to above it mentions Vega as the benchmark star - it was considered as such about 150 years ago or so when they decided on this scale but in our modern times Vega is considered a little bit off 0.0 I wouldn't use the Moon, it varies too much!
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