An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

While the planets are technically always "aligned" along the same plane in our sky, seeing so many at once is a special ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

Four planets will be in the parade in January, while seven will align in February. Here's how to see the events.

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This may explain the strange properties of the orbits of our solar system's planets, which are not quite perfectly circular, and all lie on slightly different planes. NASA artist’s conception of ...

SCIENTISTS have discovered a new super-Earth with an ‘eccentric’ orbit that swings it in-and-out of its star’s habitable zone ...

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

Mars, Jupiter, Saturn, Venus, Uranus and Neptune will be visible in the sky at the same time, with tonight’s new moon ...

Here’s how it works. A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets ...