Five Astronomy ‘Facts’ That the 21st Century Has Already Overturned
A new Big Think roundup underscores how quickly astronomy has rewritten its own rulebook in the 21st century, from the status of Pluto to the scale and composition of the universe itself. The changes are more than academic: they show how better instruments, deeper surveys, and sharper theory are forcing scientists to revise long-held assumptions about what the cosmos is made of and how it evolves.
