🚀 go-pugleaf

The idea of increasing mass with increasing velocity is one of the more 
common fallacies.  Consider the following:  There are some quasars in the
universe whose redshifts indicate they are moving away from us at .99c
due to the expansion of the universe.  It follows that earth, and the solar
system, and the local galaxy, are going .99c in their rest frame.

Since our mass must be the same in our reference frame or theirs, and we've
not turned into a black hole in either case, it follows that we are not 
in danger of turning into a black hole through excess velocity.

The actual process of making a black hole involves general relativity
with which I am not too familiar, but I think it's clear that speed alone
will not do it.

Steve Timm