Einstein’s Theory of Gravity Holds Up on Test of a Three-Star System

Scientists understand gravity pretty well when it comes to two objects, but add a third, and you’ve got chaos—a system that’s impossible to explain with our simplest equations. But you also have a way to test the limits of Einstein’s theory of gravity. Read More >>

NASA’s New Interplanetary GPS Is More Old School Than It Sounds

Here's a space-age idea if you've ever heard one: NASA is building a galactic GPS system that will provide astronauts a better, more accurate map through our solar system. This is obviously an ambitious undertaking, one that will take generations, not years, to complete. Read More >>