A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on?

A mysterious "rogue" planet has been observed gobbling six billion tonnes of gas and dust a second -- an unprecedented rate ...

Astronomers are investigating a strange class of exoplanets known as eccentric warm Jupiters — massive gas giants that orbit their stars in unexpected, elongated paths. Unlike their close-orbiting ...

It's 'spoke season' on Saturn when strange features appear in the planet's rings. The Hubble Space Telescope continues to ...

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

The newly identified world, named TOI-4507 b, is located around 578 light-years away and orbits a remarkably young star ...

A strange 200 million-year-old object with the mass of a planet has been discovered 20 light-years from Earth, outside our solar system. The "rogue," as it's referred to by researchers, is producing ...

Astronomers have discovered an alien world that defies every planetary rule with its massive size, low density, and tilted ...

Our Solar System contains eight planets (sorry, Pluto) orbiting around the Sun. But while all planets are important members of the club, if we’re being honest, we know there’s a crown jewel of our ...

It’s especially puzzling since Venus is a terrestrial world much like Earth, so much so that it’s considered to be our planet ...

For years, scientists staring at Mars through the eyes of orbiting spacecraft noticed something strange: a mysterious signal ...