What Do We Really Know About Our Universe?

In October alone, scientists published papers in reputable journals questioning what we think we know about the expansion of the universe, galaxy formation, the number of galaxies in the universe, and the number of planets in our solar system. Among other data, scientists used the galaxies visible in the Great Observatories Origins Deep Survey (GOODS) to recalculate the total number of galaxies in the observable Universe. The image was taken by the NASA/ESA Hubble Space Telescope and covers a po...