The outer layers of the sun have so-called differential rotation. The equator of the surface rotates once every 25.4 days; near the poles it rotates about once every 36 days.
A modern marvel of engineering, the invention of the space shuttle changed America's space program forever. Take a journey through the incredible science of aerospace engineering.
A lot has happened since Laika the Russian dog first took a trip into orbit in 1957. Revisit that milestone—and many others—in this interactive time line.