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

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

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds silently loop around their stars. Some drift as far as 10,000 times the distance ...

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...

But an international team of astronomers have detected the unmistakable signature of a gas giant planet orbiting the ...

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

The space-based observatory has revolutionized the way we see space, and it can now add another remarkable accomplishment to ...