Send to a Friend

6rant6's avatar

How do we know that distant galaxies are not made up of antimatter?

Asked by 6rant6 (13700points) July 1st, 2011

Is it possible that distant galaxies are made up of antihydrogen and antihelium, etc.? The evidence we have of their existence is electromagnetic radiation. Would it look any different if they were made of antimatter?

Using Fluther

or

Using Email

Separate multiple emails with commas.
We’ll only use these emails for this message.