Have you ever wondered how astronomers measure the distance to other objects in the universe? How do they make claims that this nebula is 1,500 light years distance or that galaxy is 2.5 million light ...

It was a cool, crisp autumn day in Pennsylvania in 1966, and I remember it well. There I sat in Mrs. Moyer’s 10th- grade geometry class daydreaming out the window, as I often did, and pondering ...

NARRATOR: I see, you hired a go-kart from the intergalactic market. NARRATOR: I’ve got an idea, you can estimate the length in steps. The go-kart is ten steps in length and the limousine is 30 steps ...