Rule of Thumb

RULE OF SIX

A six-inch telescope looking at a sixth magnitude star will receive 10^6 (i.e. 1 million) photons per second. – David ...

A six-inch telescope looking at a sixth magnitude star will receive 10^6 (i.e. 1 million) photons per second. – David Palmer, Astrophysicist

12/21/13

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