The shape of a planet's orbit is one of its fundamental properties, along with its size and distance from its host star.

Planets change orbit shape around Neptune’s size. Metal-rich stars help giant planets form. Eccentric orbits suggest chaotic planet formation.

Astronomers have identified a quartet of small rocky planets orbiting Barnard's star - one of our closest stellar neighbors - ...

Not that it was a competition, but Saturn surpassed Jupiter in known moons a few years ago. Now the giant planet may never ...

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar ...

Considered a solitary star for its lack of stellar companions, Barnard's Star is notoriously lonely—signs of any exoplanets ...

UCLA astrophysicists have now measured the shape of the orbits of exoplanets — from the size of Jupiter down to the size of Mars — and shown that small planets have nearly circular orbits ...

Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard's Star, the second-nearest star system to Earth.

Observers could see up to seven planets line up in the sky after sunset on Friday, but you may need a telescope to see them ...