In what could be a spooky preview of Earth's fate, some dead planets are broadcasting radio waves long after their demise and scientists are hoping to tune into the strange zombie sounds. The planets, which have been stripped to their cores by the stars they orbit, can form a circuit with the star that has destroyed them, creating radio waves that can be picked up on Earth, new research published in the Monthly Notices of the Royal Astronomical Society explains. In an incredibly violent process, when some stars reach the end of their lifespan, they can expand and burn all nearby planets, leaving them as orbiting metallic cores, before shedding their own outer layers and turning into a white dwarf. The white dwarf and the remaining cores of its surrounding planets can form a circuit and start emitting radio waves, as radiation emitted from the circuit can be picked up by radio telescopes on Earth. Scientists now plan to find these communicating dead planets by detecting their zombie