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

Mercury is the closest planet to the sun, followed by Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Mercury orbits ...

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

Mercury joins the night sky to complete a 7-planet alignment just after sunset for the end of February. Saturn leaves our ...

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

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 parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

Have you ever wondered why the planets in our solar system align along a flat plane? Discover the science behind this cosmic arrangement, from the formation of the protoplanetary disk to the forces ...

Tonight and throughout January, stargazers can see a planetary alignment in the night sky or what some are calling a ...

Although it's being mistakenly promoted as a "rare planetary alignment," one of the best "planet parades" in half a century ...