From Wikipedia on superconductivity of metallic hydrogen:
In 1968, Neil Ashcroft put forward that metallic hydrogen may be a superconductor, up to room temperature (~290 K), far higher than any other known candidate material. This stems from its extremely high speed of sound and the expected strong coupling between the conduction electrons and the lattice vibrations.
If a planet like Jupiter has lots of hydrogen, is it likely it could be a giant superconductor? What effects could this have & how can we look for or detect such a thing?