How were you taught physics? Were you taught that gravity is based on mass and therefore that light (which has no mass) isn't affected by gravity? I know this all sounds pretty technical, but it's really not. Check out this short video and get some knowledge about the real reality, not the one you thought you knew.
I remember when they told us that you couldn't subtract past zero. Then when we got older, they changed their tune. It blew my mind. This is sort of like that. via YouTube