Recent content by ojbway

I recently watched a video by SpaceRip on YouTube addressing whether or not the Universe is infinite. They mentioned an example as to why it isn't briefly, but didn't expand on it. I kept thinking that its a good reason and I want your opinion on it. Since Newton's law of universal gravition...

Most of us know that Einstein came up with the theory that superluminal speed was impossible. And most physicists nowadays believe that and have accepted that as fact. I just want to know if this is a technically correct way of stating this: Light travels at approx. 299,800 km/s in a vacuum...