🚀 go-pugleaf

In article <SRCTRAN.92Nov19111841@world.std.com> srctran@world.std.com (Gregory
Aharonian) writes:
>   I just finished reading a science fiction (actually with an Islamic
>setting, a rarity in the field), which had as one of the main points of
>the story that if you built a spaceship and continually accelerated,
>eventually you relativistic mass, for the size of the spaceship, would
>be large enough to cause collapse into a blackhole.  Not being good with
>keeping track of boosts, I wonder if in a large enough universe, with
>enough energy, if this is possible or meaningful. And if so, what do you
>feel in the rest frame of the spaceship when collapse occurs?
>
>It's the first time I ever seen this scenario suggested in a sci or sci-fi
>book, and it seems an interesting one to explore.

Of course it's based upon an absurdity - that a black hole could be observed as
such in one inertial frame and not in another, at the same time. (The phrase
"at the same time" is appropriate here, since the spacecraft is at one place.)
A black hole forms if the *proper* mass and radius are critical.

"Black holiness" is a relativistically invariant quantity, if a binary one.

Leigh