The hudf was a million second exposure. It would take 6 billion years to complete a sky survey at this resolution. Bill B. p.s. Don't know how many mac users there are on this list, but I found a good calculator program called Longhand which is great for this kind of stuff. http://longhand.pansophists.net/ 6 years = 189345600 seconds 1 square degree = 60^4 arc seconds = 12960000 square arc minutes 360^2 square degrees of sky = 129600 square degrees of sky = 1679616000000 square arc minutes of sky 9 square arc minutes per field = 186624000000 fields The answer to the original question One year is 3.15576e7 seconds On Mar 29, 2005, at 8:03 PM, Patrick Wiggins wrote:
Given that the Hubble Ultra Deep Field measures 3 arc minutes on a side how many HUDFs would it take to cover the entire sky?
Thanks,
Patrick
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