5 Mar
2015
5 Mar
'15
3:34 p.m.
The NY Times story included mention of the "Einstein halo" — a ring seen when a supernova, a large amount of mass, and an earthling eye are lined up. Is a circle an odd number? --Dan
On Mar 5, 2015, at 2:29 PM, rcs@xmission.com wrote:
I read somewhere that "Einstein lensing" should always produce an odd number of images(?)