The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

Astronomers have discovered a rare planet orbiting at a 90-degree angle around two brown dwarfs—marking the first evidence of a polar planet.

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

The image of Luke Skywalker gazing wistfully across the desert of Tatooine while a pair of “suns” set on the horizon is among ...

These objects were bigger than gas giant planets but too small to be actual stars, according to the European Southern Observatory. The two stars in orbit produced eclipses of one another ...

Scientists examined infrared space surveys to narrow down candidates for Planet 9. Planet 9 would be so far from the Sun that ...

The pre-dawn sky on April 25 will see a conjunction of Venus, Saturn and a waning crescent moon, which will resemble a ...

An exciting first in planetary discoveries!

These planets typically occupy orbits that roughly align with the plane in which their host stars orbit each other. There have previously been hints that planets on perpendicular, or polar ...

Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar system was touted more than a century ago.

NEW YORK — A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Located about 120 light years away, the exoplanet appears to take an ...