> This is because its impossible to bend light beams in free space. This isn't strictly true, depending on how you define "free space." In fact, you can bend l

> This is because its impossible to bend light beams in free space. This isn't strictly true, depending on how you define "free space." In fact, you can bend light at will if you can control gravity. Gravitational lensing is the basis for measuring the mass of distant planets and other such astronomical things. So, all you need to do is curve space-time. Thanks Einstein.