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I was reading in a book about cosmology. It said that the universe was expanding and we all know that.. But the proof it gave was that scientists discovered that stars and galaxies were moving away. This kind of confused me. Because if we consider universe as a room and stars as people in the room. If the people(stars) are moving away from a center does not mean that the room is expanding. Its just the people that are moving towards the boundaries of the room. Help me on this one.
rosalind dna your statements are not clear and appear to be very mis informed and your web reference does not work.
yes Dick- that's why this whole science thing is so brilliant!
I have heard it said that dark matter must exist because there is a shortfall in the combined mass of everything visible in space. How is this measured?