Light travels at almost 190,000 MPH per second. Light is a particle just like dust or any other thing. What is making it travel that fast? How does light travel threw space if theres nothing to travel threw? Shouldn't that mean that sound can travel threw everything too? If light can travel threw everything except for solids then why can sound travel threw solids? To Dave: how is it massless if everything has mass? blackholes are so strong they can pull light in so it can't be massless, Thanks for informing me! That anwsers aloooooot of my questions!