Thread: Comet Halley spotted at 4200 million km
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Old 05-September-2003, 02:00 AM
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Quote:
Originally Posted by The Bad Astronomer
The STIS Deep Field (and the other ones too!) were made up of hundreds of separate exposures, which were added together after they were made. This hugely increases the amount of light you can detect.
So is it cumulative, then? Can you add together 10 1-day exposures and have a 10-day exposure?
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