"Cortisol face is a made-up term from the media. What is real is moon facies, a condition in which the face appears round, puffy and moon-like," Bala told CNET. "This can be secondary to disorders ...

So that determines a white dwarf's minimum size, while their maximum size depends on their mass (the more massive, the larger they are) and their temperature.

True “moon face” is brought on by a “buildup of fat deposits throughout the face and it’s usually due to excessive cortisol production,” said Rocco.

However, Cushing Syndrome is very rare, and while stress can contribute to inflammation, health experts say it’s likely not the only culprit if you feel your face is appearing swollen and bloated.

Astronomers just took a big step toward a better understanding of white dwarfs, a discovery that could shed light on mysterious dark matter.

Astronomers just took a big step toward a better understanding of white dwarfs, a discovery that could shed light on mysterious dark matter.