In a dance of light and gravity, a lemon-shaped planet reveals a secret never before disclosed.

There is a world out there, about 750 light-years away from us, that seems to have come out of a stellar fairy tale: PSR J2322-2650b, an exoplanet whose shape resembles a lemon suspended in the infinite sky. This planet is not round as we would expect — it has been deformed by the titanic forces of a dying star, a pulsar that squeezes it [...]