In: Physics
We think the universe is expanding like a loaf of raisin bread baking in the oven. This means that (A) some clusters of galaxies are not getting farther away from other clusters of galaxies. (B) the expansion looks di↵erent from each cluster of galaxies. (C) the expansion looks the same from each cluster of galaxies. (D) we should be able to determine the location of the center of the expansion. (E) the universe will eventually collapse.
If big bang cosmology is correct (A) nearby galaxies will appear to have evolved to a more advanced stage than distant galaxies. (B) distant galaxies will appear not to have changed. (C) the universe is not expanding. (D) matter is continually being created in the spaces between the galaxies. (E) all the stars in the universe are approximately the same age.
Which is not evidence for the big bang? (A) nucleosynthesis and the ratio of H to He (B) most galaxies are redshifted (C) distant galaxies are di↵erent from nearby galaxies (D) cosmic microwave background radiation (E) there are black holes at the center of many galaxies