Distinguishing between brown dwarfs and giant planets has confused astronomers, but a clear separating factor has finally been identified.

New observations of "forbidden" planet TOI5205-b reveal surprising details about it its atmospheric chemistry.

Aging stars can completely destroy their planets. When a star reaches the end of its life on the main sequence, it goes through dramatic changes. And those changes don't just dictate the star's fate; ...

Binary stars are known to transfer mass to one another. In extreme cases, mass transfer can even cause a supernova explosion.

Gas giants—the species of planets to which our solar system neighbors Jupiter and Saturn belong—are truly fascinating. The largest of them, in fact, often evade easy categorization, as their size ...

Hydrogen sulfide is what makes rotten eggs stink. But the discovery of this gas in the atmospheres of four distant, Jupiter-like planets is turning heads for a pleasant reason: It solves the mystery ...