Exoplanet HIP 67522 b, fluffed up to the size of Jupiter, circles so close to its star that it’s triggering violent flares — ...

Even though it is one of the smallest planets spotted around such a star, HD 56414 b— spotted by NASA's TESS mission as it transited the face of its star — is still 3.7 times the size of Earth.

When we gaze into the night sky, we see a tiny fraction of what lies beyond our Solar System. In the vastness of space, our Sun and its planets are but a speck of dust. There are thousands of stars ...

Since its debut in 2021, the James Webb Space Telescope has dazzled viewers with its infrared images of galaxies, nebulae, ...

Many of these worlds are closer in size to the largest planets in our solar system, like Jupiter or Neptune, and orbit very close to their host stars. But rogue planets are likely much smaller. As ...

Earthlike planets orbiting some configurations of binary stars can stay in stable orbits for at least a billion years, researchers reported January 11 at the American Astronomical Society meeting ...

The ages of planets and stars helps scientists understand how they change – and, in for planets, if life has had time to have evolve. Skip to main content Open menu Close menu ...

Astronomers have used the ALMA radio telescope to investigate how planets grow in protoplanetary disks of gas and dust around young stars.

Given that there are about 9,000 stars visible to the naked eye, the fraction of them known to host planets is surprisingly small. A lot of this may be because of how we find planets, however.

Measuring the ages of planets and stars is tricky. An observational astrophysicist describes the subtle clues that provide good estimates for how old different space objects are.

When the skies darken during the total solar eclipse on April 8, colors will change, and some stars and planets will be visible in the daytime. Here's what to look for, and where.