A Saturn-sized planet circling a tiny red dwarf is rewriting what scientists thought was possible in planetary systems.

A white dwarf is what remains after a sun-like star swells up to a red giant during the star's evolution. Red giants burn through their hydrogen fuel and expand, consuming any planets near their path.

Astronomers have spotted a giant planet, TOI-6894b, orbiting a tiny red dwarf star, challenging existing planet formation ...

The white dwarf we see today was once a star similar to the sun but eventually ran out of fuel, swelled up into a red giant, a few 100 times the size of the sun.