Mars is home to perhaps the greatest mystery of the Solar System: the so-called Martian dichotomy, which has baffled ...

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 ...

NASA’s Voyager mission completed humankind’s first close-up exploration of the four giant outer planets of our solar system.

Sunspots, which are temporarily darkened areas on the surface of the sun ... this solar weather. Recently, however, astronomers have been keeping track of starspot activity on a red giant star ...

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

An object eight times the mass of Jupiter may have swooped around the sun ... solar system, the researchers found that in approximately 1% of the simulations, the visitor's passage altered the ...