Okay. I need answers. Cosmology (for me) is an interesting topic and it explains things through the universe, in theories.
Alright. I need some nerds of cosmology to answer me a couple of questions that I'm kind of curious as to know, and then there is a bonus question of personal opinion. I was watching a documentary on dark matter and dark energy, so this has prompted my questions.
1. How is the universe expanding when there is nothing beyond the universe? I don't get it. It's not like a mountain, made by atoms, to fill in space of other atoms. How can something expand into nothing? I thought about it, and I decided that the universe must expand by dark matter and dark energy to expand away, and then other dark matter and dark energy to fill in the space that previous dark matter and dark energy once had. Would this be correct, or have scientists of cosmology not reached a theory for that? It's interesting as to how something grows into nothing beyond.
2. How is a moon formed? I don't know, I've never been taught it, and I'm too lazy to look it up on the interwebs. I know that stars, planets and suns are formed in nebulae (please correct me if I'm wrong), but I don't know how moons, like Luna, are formed. Are they just large asteroids caught in the gravitational pull of a planet, or they tiny planets?
3. What is your view on dark matter and dark energy? What's your view on the graph which some cosmologists have made up of things that make up the universe? 5% atoms, which we can see, 25% (or 20%) dark matter, which we can't see, and dark energy which makes up 70% (or 75%) which is just a theory.
Thanks.
