Prof Lewis, lead author of the study published in Nature Astronomy, said: "Looking back to a time when the Universe ... astronomers had confirmed the slow motion Universe back to about half ...

Calculate speed using the speed equation - speed = distance divided by time. The speed equation can ... Let's think now about the concept of motion and in particular, the idea of speed.

Calculate speed using the speed equation - speed = distance divided by time. The speed equation can ... Let's think now about the concept of motion and in particular, the idea of speed.