Dear amartone12:

wrote in message
ups.com...
The collapse of matter towards the formation of a
black hole should

.... appear to ...

slow down indefinitely, observed ""from outside"",
as it comes nearer and nearer to forming a horizon.

Note that the horizon is never visible.

Note that neutron stars have high energy emissions from their
surface as stuff crashes down. That emission should vary in
intensity perhaps, but be of similar energy. Once a neutron star
collapses into a black hole, the energies from the surface should
also shift towards the red, and in a short time, be
indistinguishable from any other image "trapped" above the
horizon.

Note that a neutron star is not compact enough to have a second
einstein ring:
http://antwrp.gsfc.nasa.gov/htmltest...nslens_ns.html
.... where the light from an object aligned directly behind you
appears as a ring of light. (I think this is the second "sky
Einstein ring").

David A. Smith