FAST is a new telescope that has panels that can shift position to create smaller curved dishes anywhere on its surface.
Since time slows down the closer you get to the speed of light, if alien spaceships could travel at light speed, wouldn't they take longer to get places?
Have you ever wondered what’s on the other side of the universe? Well, there are two ways to think about that question. Either the universe ends, which means it’s finite, or else it’s infinite. According to Einstein, the universe is finite.