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A comment on A Binary Star Is About to Go Supernova and Could Produce a Gamma-Ray Burst. Parent comment

Re:A Binary Star Is About to Go Supernova and Could Produce ... by dotancohen on Tuesday November 20, 2018 @04:44PM (#18498053)
You are right about everything except the t. When we observe the supernova, we will call that moment t=0.
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Re:A Binary Star Is About to Go Supernova and Could Produce ... by AnimalMuppet on Tuesday November 20, 2018 @04:47PM (#18498098)
If we call the moment at which the light reaches us t=0, then we will say that the supernova occurred at t=-8000, because we know where it occurred, and we know what the speed of light is.
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