Just as Sun, Moon, Mercury, Venus and Mars move through the signs of the zodiac as they orbit, so do the outer planets.

Mars, Venus, Jupiter, and Saturn should be visible to the naked eye. The six planets will be visible until February 9. You'll ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Amazing views of Jupiter over the years via the Hubble Space Telescope. The moons of Io, Ganymede and hazy Uranus can be observed. Credit: NASA, ESA, STScI, A. Simon (NASA-GSFC), M. H. Wong (UC ...

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

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

Planetary alignments aren't rare, but they can be when they involve six of the eight planets in our solar system.

While planets circle the sun in what's called and heliocentric orbit, they rarely fall together in what appears to the human ...

Starting at 12:30 p.m. ET (1730 GMT) on Saturday (Jan. 25), astrophysicist Gianluca Masi of the Virtual Telescope Project ...

Mars, Venus, Jupiter, Saturn, Uranus and Neptune will be visible all at once this month. ISTOCK / GETTY IMAGES PLUS The planets in our solar system orbit the sun in roughly the same plane ...

Have you read on social media about the “once in 396 billion years” planetary alignment happening on Jan. 25? Guess what? Social media is not reliable. Here’s what’s really going on — and why you ...

Blue Origin, the space company founded by billionaire Jeff Bezos, launched its massive New Glenn rocket into orbit for the first time early Thursday, marking a new step in the commercial space race.