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Astronomy and Cosmology
Cosmology
Clarification about the size of the Universe
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[QUOTE="amorphos_b, post: 6815779, member: 515127"] Clarification upon size of universe when we look at distant galaxies we are looking back in time to an ever shrinking universe. Which I would visualise as conical. If then, we could see all the galaxies as they really are right now, then surely those cones would all disappear, and the universe would be vastly bigger? e.g. by the same degree as the cones reduce over time, the universe would be at least that much greater in size. The cones in every direction would be straight instead. Secondly some galaxies crash into others, and maybe as a result some perhaps split off – if e.g. a galaxy was traveling in a different direction, some of the velocity would push or pull some stars away from others. Even if we don’t ever get more galaxies, we would get less from collisions. So how can we know how big the universe is now, and how many galaxies it is composed of? [/QUOTE]
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Cosmology
Clarification about the size of the Universe
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