What does "the universe is flat" mean?
Why is the universe flat?
What is the shape of the universe? How could the universe have formed from nothing? Is there empty space outside the universe? What's outside the universe? Before the BIG-BANG the Universe was condensed in just one point. Where was that point in, since the Universe was all there in that point? What lies at the "edge" of our universe? Is space and the galaxy actually empty? If everything in the universe doubled in size overnight, would one be able to figure it out? What is the shape of the universe, conical or spherical? How vast is the universe? According to mainstream physics, what is there outside the Universe? How in the world did Flat Earth become a theory again? If the earth is round and we live on the surface (keeping in mind the law of gravity) why doesn't anybody fall off? Given that the reality of the molecular state of all matter is mostly empty space, why does matter feel solid? What lies outside of our universe? Why we are here in the universe? How was the Universe formed? How was Universe formed? What is the thing outside universe? What is at the edge of the observable universe? Why is flat better than nested? What is beyond the observable universe? If there are multiple universes, could they be connected by the Zero Point Field? What is there outside of the Universe? Are parallel universes real? How can the universe just start from nothing? Is the universe infinitely large? Does absolute rest or motion exist in the universe? Is Ω < 1 = The shape of the Universe? What is the size of the universe?