You are browsing the archive for 23 October 2009 - Dan's Wild Wild Science Journal.

23 October 2009

Ancient Light Into The Shiny Bucket

Astronomers call telescopes light buckets. This is because they are really just buckets that catch photons of light. Your backyard telescope catches photons that have mostly been travelling through space for a short time. Photons from the moon have only been travelling for 1.5 seconds. The photons from the Sun about 8 minutes. Mars is about 15 light minutes away and Pluto is just under 6 light hours away. So …


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