A Space Whale has been traveling from point A (let it be Sirius) to point B (let it be Vega) faster than light (FTL). Did it emit Cherenkov radiation while traveling?
Cherenkov radiation is radiation emitted when some particles travel faster than the speed of light of the medium in which they travel. It can be seen sometimes at submerged nuclear reactors and has a beautiful blue color.
Before you say it I ALREADY KNOW that currently we think (from what empiric results tell us) that nothing can go faster than the speed of light in a vacuum, just answer the question and don't come at me with the 'nothing can go faster than light'.