This is what it sounds like inside a neutron star

The sound from inside a neutron star has been recreated by scientists.

Researchers from MIT listened to sound waves moving through a “perfect fluid”. For physicists, this means a fluid that flows with the smallest amount of friction that is allowable by the laws of quantum mechanics.

Such fluids are rare in nature, but are believed to occur in the heart of neutron stars - dense clusters of material that are remnants of a star going supernova and exploding.

The scientists took an unusual method to recreate the liquid, as they used a gas instead. Researchers sent the sound waves through a gas of lithium-6 atoms - elementary particles known as fermions - and continuously increased the pitch of the sound while it was being played.