Do antistars absorb photons? I read Feynman's Book, "QED - The Strange Theory of Light and Matter", there a while back. With reference to Feynman's book, "QED", He said,... "Every particle in Nature has an amplitude to move backwards in time, and therefore has an anti-particle." So, from this I think an anti-photon would look like a photon, but a photon is traveling forward in time, whereas an anti-photon is like a photon traveling backwards in time. Just wondering, althought an antistar may not exist. And the CP violation sure does seem to put a spanner in the works for time reversal symmetry... If an anti-star did exist, would it be emitting anti-photons. As far as I know, an anti-photon is like a photon going backwards in time. Therefore, I reckon, from our perspective the anti-matter star, would seem to be absorbing photons. If this is so then an anti-star would be a bit similar to a blackhole in the sense that they are not directly visible. However a blackhole is different as it is the result of the collapse of regular matter due to its gravity. What do you's reckon? When viewed with time moving forward as we experience it, would the antistar seem be absorbing photons? I haven't a clue is there any known anti-matter star, or if such a thing as an anti-supernova has ever occurred (like a supernova happening backwards in time). Probably unlikely because of the CP violation.