Semi-OT: We will go to Stars.

[Suicide Junkie]

Originally posted by Yimboli:
Correct me if I am mistaken: You cannot go faster than the speed of light through a *vacuum*. You can, however, go faster than the speed of light through a different medium, such as water. Water slows the speed of light significantly, and you can make a particle go faster than how fast light goes through water - and weird things happen.

Yes? No?

The speed of light waves in water is about 2/3 c.
When you have radioactive materials in the water, and they emit subatomic particles at above 2/3 c, then they produce Cherenkov radiation, which is the equivalent of a sonic boom.

However, relativistic effects are relative to c, not the speed of light in a local medium.