Brian Cox - Light Doesn't Travel Fast But Why

Watch Prof. Brian Cox as he talks about why light doesn't travel fast in the vast universe over cosmological distances. In addition to that, he also explains how light travels at 186,000 miles per second. Moreover, he adds that only the nearby object, the Andromeda Galaxy, is the closest object we can see with the naked eye, which is about 2 million miles away. Finally, he discusses how we have detected the most distant light, which was discovered in the 1960s and is called “COSMIC MICROWAVE BACKGROUND RADIATION.“ This light, known as CMB, marks a time 380,000 years after the universe's birth or the Big Bang. #bigbang #briancox #universe #speedoflight #cosmicmicrowavebackground #cosmology