A recent study has uncovered a dramatic interaction between a planet and its parent star that is reshaping our understanding ...

The clingy planet orbits so close to its star, it triggers powerful explosions of radiation that eat away at its atmosphere.

Stars often whip their planets with solar winds and radiation, pull them ever closer with gravity and sear them with heat.

Scientists Astonished By Discovery of Giant Planet That Doesn't Make Any Sense: 'We Don't Understand' After decades of ...

To their great surprise, the accumulated measurements revealed an extremely low density for the planet. Its mass and its size, they calculated, were about 0.14 and 1.5 that of Jupiter, respectively.

Astronomers have discovered a gas giant planet with the density of a marshmallow orbiting a cool red dwarf star located 580 light-years from Earth. The Jupiter-like exoplanet is the lowest-density ...

Matching the density of the two planets produces a model that has a bit over 10 percent of the planet's mass composed of water. This, however, means that about half the planet's volume is water.

Illustration of WASP-39 b, another low-density, "fluffy" planet. The newly discovered WASP-193b is the second-least dense planet ever found, with a density similar to cotton candy.

This new planet, located 1,200 light-years from Earth, is 50% larger than Jupiter but seven times less massive, giving it an extremely low density comparable to that of cotton candy.

Scientists have discovered a planet that they said could float in a bathtub if you could get one large enough. The planet is about 580 light-years away from us and is orbiting a red dwarf star in ...

Low-density planet presents big challenge WASP-193b, which researchers think is made up of mostly hydrogen and helium, was a huge puzzle for researchers to piece together.