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

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

Seven planets will line up for a rare "planetary parade" today (Feb. 28) and you can watch it live online, beginning at 12:00 p.m. ET (1700 GMT).

The seven other planets in our solar system can be seen in the sky at once through Friday, forming a planet parade. But two ...

IT’S been nearly 40 years since the first planet outside of our Solar System was discovered. Since then, more than 5,800 weird and wonderful worlds across 4,300 planetary systems have been ...

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

Seven planets are on display in the night sky at the end of February, but some will be harder to spot than others. Here’s ...

Like the planets in our solar system orbit the sun, most exoplanets also ... Variation (TTV), uses the movement of planets around their stars, which can affect the signal for the star's brightness.

The planets orbit the sun continuously ... Pluto isn't part of any planet parades For those people still scratching their heads, trying to figure out why the solar system has fewer planets ...

And some experts believe planets should be defined by their intrinsic properties, not just their ability to clear their orbit. While the IAU hasn’t reversed its decision, the debate continues ...

Such an alignment happens when the planets orbit the sun on a relatively flat ... Voyager 1 & 2 deep space probes nearly 50 years after their missions launched to extend them further.