[bryan1276]

1) how long ago did SN1987a occur, and Hmmm, probably about 14 years, but that's just my guess. Maybe later, maybe earlier. 2) how fast was the speed of light at that time. This has more to do with how far away it is. But I'd say lightspeed was pretty fast back then too. Hasn't changed measurably I'm sure. As "Physicist" has stated, ballpark figures will suffice, you needn't strain yourself trying to come up with answers down to the last decimal place. I agree cause you wouldn't be able to check out the answers to see if they were correct anyway.

[Physicist]

how long ago did SN1987a occur, and Hmmm, probably about 14 years, but that's just my guess.

Ridiculous. It's 150,000 light years away, and we saw its first light only 14 years ago. If it happened not long before we saw it, that either means that it could only be a tiny fraction of a lightyear away, or that the light travelled instantaneously only 14 years ago. You don't believe any of that, do you? Try again.

[longshadow]

1) how long ago did SN1987a occur, and Hmmm, probably about 14 years, but that's just my guess. Maybe later, maybe earlier.

Well, considering that we first observed SN1987a 14 years ago, you'd have to assert that either the speed of light was instantaneous, or the LMC is perched atop the Milky Way. But according to your sources, the speed of light has never been measured to be anywhere near instantaneous in the past few hundred years, so the instantaneous speed of light in recent time seems to go out the window.

That leaves the LMC hunched over the Milky Way. Do you have any evidence of this? Can you explain how the Cephied variable data can indicate that we are 150,000 light years away from the LMC when it is about to pounce on us? What about the gravitational effects of the LMC being as close as you suggest, why haven't we seen any evidence of that?

By the way, since you have now responded to "Physicist's" questions, you can now respond to the rest of mine in my previous post.