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A comment on With Help From Jodie Foster, SETI Resumes Search for Alien Life. Parent comment

Re:With Help From Jodie Foster, SETI Resumes Search for Alie... by ceejayoz on Tuesday August 16, 2011 @06:59PM (#2893255)
Considering we can detect radio sources more than 10 billion light years away, I suspect ours can probably be spotted a few tens of thousands away.
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Re:With Help From Jodie Foster, SETI Resumes Search for Alie... by tedunangst on Tuesday August 16, 2011 @09:51PM (#2893692)
I can see the sun from more than 90 million miles away, but that does not mean I can see your flashlight from a few tens of miles away.
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Re:With Help From Jodie Foster, SETI Resumes Search for Alie... by ceejayoz on Tuesday August 16, 2011 @10:34PM (#2893801)
With good optics and a vacuum in between, sure you can.
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