[yor_on]

Take a look at this Gravitational Redshift

[Robro]

Interesting. More interesting is the fact that nothing, neither matter nor light can travel faster than light! At least this has never been prooven to happen! I wonder just exactly what it is that matter is made of that cannot travel FASTER than light? All things being equal...

[JP]

Mass is a property of matter.  I think you mean to say that matter can't travel faster than light (nothing can), and matter with non-zero mass requires infinite energy to even travel at the speed of light, which is physically impossible.

[Robro]

Mass is a property of matter.  I think you mean to say that matter can't travel faster than light (nothing can), and matter with non-zero mass requires infinite energy to even travel at the speed of light, which is physically impossible.

Yes, corrections made