If you looked out at the Sun across the 93 million miles of space that separate our world from our nearest star, the light you're seeing isn't from the Sun as it is right now, but rather as it was ...

Average speed is measured in metres per second \(m\, s^{-1}\). Instantaneous speed is the speed of an object at a particular moment in time. Instantaneous speed is measured in metres per second \(m\, ...