system
Given the following post, respond as if you're commenting on Reddit:
human
How do different anti particles interact? This post is going to have a bunch of different questions, so sorry for the confusion


1) is it possible for there to be, somewhere in the universe, planets made of antiparticles? I know that theoretically half matter half antimatter was created, but since our solar system exists, could there are ossicle be an “inverse” with antimatter?

2) I recently read an article about neutrinos which said  that neutrinos might be their own anti particles. If (hypothetically) that was the case, could you create energy by only making neutrinos and making them collide?

3) what are the “unwanted emissions” when matter and anti matter collide ( the equivalent of radiation for nuclear fusion, CO2 for fossil fuels, etc...)? 

4) I saw a video about strange quarks and strange matter and how( in theory) everything it  comes in contact with also turns to strange matter. How does that process work?

Sorry that I have so many questions!
gpt
1) Yes, but we don't believe that to be the case.  There is a fundamental matter/anti-matter asymmetry, which meant that slightly more matter than anti-matter was made in the early Universe, hence why we don't see equal parts anti-matter and matter.

2) When a particle and its anti-particle meet they annihilate to create energy, so yes, in that model, two neutrinos could annihilate to create energy.  However you wouldn't get any energy for free, since you'd still need energy to create the neutrinos.

3) Usually when particles and anti-particles collide and annihilate they will become photons.  At higher energy collisions they could also create other particles, according to the rules of the Standard Model.

4) This is a model where particles with large numbers of strange quarks are more stable than "normal" particles.  So when it impacts a normal atom, it will convert some of that atoms quarks to strange quarks and continue to grow.