[thedrake]

Franson's arguments are based on observations made of the supernova SN 1987A–it exploded in February 1987

If its 168,000 light years away, then doesn't that mean that it exploded 168,000 years before we became aware of it?

This is making my head hurt.

[alancarp]

It’s worse than that: the 168,000 light years distance estimate is based on... yep: light.

[353FMG]

Not only that, but how do they know the exact moment, where time = 0, that the explosion occurred? Saying that it took place in February 1987 doesn’t cut it.