The comet we landed on is singing a haunting song

Are you ready for some pretty amazing science?

The world celebrated the wonderful achievement of landing a spacecraft on a distant comet this week, but the observations it makes there will offer the true scientific value of the mission. And the Rosetta mission's new home, comet 67P, is singing as it spins through space.

You may have heard that sound doesn't travel in the vacuum of space, where there's no air to carry it - or, as the classic space horror film Alien put it, "in space no one can hear you scream".