The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

Six planets are lining up in a row from our Earthly view of the cosmos, in a spectacle that'll be visible in January through ...

Reaching Mercury is such a challenge because “the gravitational pull of the Sun is very strong near Mercury, which makes it ...

BepiColombo passed a mere 295 kilometers above Mercury's surface at 6:59 CET on Jan. 9. The flyby began on the planet's ...

The joint European-Japanese mission is only the second survey of Mercury, the least explored planet in the inner solar system ...

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

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

You aren't too late to catch a glimpse of a so-called 'planet parade' in the night sky, although to see them all, you might want to grab a telescope.

It will be "a celestial event where multiple planets in our solar system appear close together in the night sky." ...

A rare parade of planets will light up the night sky throughout January. Six planets will be in alignment for the rest of the ...

The close-up images reveal craters, the floors of which are in permanent shadow, and vast sunlit northern plains.