30 Jun
2010
30 Jun
'10
1:07 p.m.
On Wed, Jun 30, 2010 at 11:27 AM, Henry Baker <hbaker1@pipeline.com> wrote:
"How do we know whether something we're looking at in a telescope is matter or anti-matter?"
I think the main answer is that space isn't empty, and if there were a boundary between matter and antimatter anywhere we would see all the gamma rays coming from the annihilations at the boundary. There aren't many other asymmetries! --Josh