Hello, i am relatively new to Physics and find the subject fascinating, really seems to give insights into the unvierse like religion/spirituality does. I was reading "A brief history of time" by Stephen Hawking and in the chapter "Space and time" he discusses Ether and how it was disproved. For any who has read that book, could you explain to me how it was disproved? It talks about relative speeds and how at right angles to this ether it SHOULD go at the speed of light, i have no idea what this means and whether it means the earths orbit of the sun or the earth spinning. I would really appreciate a baby step explanation of this as i would really like to get my head around the topic.