How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

Astronomers using the European Space Agency's Cheops mission have caught an exoplanet that seems to be triggering flares of ...

A new investigation into old Kepler data has revealed that a planetary system once thought to house zero planets actually has ...

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.

The Sun, our life-giving star, is slowly dying. In about 5 billion years, it will exhaust its fuel and transform into a red giant, altering the solar system forever. But long before that, the Sun’s ...

The host star, HIP 67522, is slightly larger and cooler than our Sun. But unlike our middle-aged star, this one is just 17 ...

Planets may begin forming much earlier than scientists once believed during the final stages of a star s birth, not afterward. This bold new model, backed by simulations from researchers at SwRI ...

Some planets take the expression "you're your own worst enemy" to the extreme. At least, that's what astronomers found when ...

This discovery marks the first known case of a compact planetary system with such a noticeable tilt between close planet ...

Earth" that is located about 154 light-years away and is nearly twice as big and four times as massive as our planet.