Word: kirshners
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...Here's the tricky part. There's not anything they've measured that tells you that there's a black hole, Kirshner says. "What the measurement tells you is that it's a large mass in a small space...
Since black holes do not emit or reflect light by definition, and therefore cannot be seen, their existence is based on indirect evidence, say Kirshner...
Knowing the velocity of the gas, which was calculated to be about 1.2 million miles per hour, Kirshner says simple Newtonian physics was used to compute the mass necessary to provide sufficient gravity to keep the disk of gases from flying apart...
...There's a very sharp concentration of light in a small place in the center of the galaxy as if there was some object there keeping stars in a close orbit," Kirshner says...
Like Narayan, Kirshner has doubts about the finality of the Hubble findings...