The six planets were visible in the days immediately leading up to Jan. 21, and for about four weeks afterward. Mars, Venus, ...

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

In Earth's upper atmosphere, a fast-moving band of air called the jet stream blows with winds of more than 275 miles (442 km) per hour, but they are not the strongest in our solar system. The ...

While four members of this 'parade' can be easily spotted in a clear dark sky, finding the final two can be something of a ...

"A parade of planets, also sometimes referred to as a planetary alignment, is when several planets in our solar system appear to line up in the sky from our perspective here on Earth," John Conafay, ...

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...

Observations of WASP-127b, a giant gas exoplanet more than 500 light years from Earth, suggest it has phenomenally high wind ...

Especially since all seven of the other planets in our solar system are about to become visible at once in a great planetary ...

This alignment will give people an opportunity to see multiple planets at once, but the difference will not necessarily be ...

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 ...

Witness a rare celestial spectacle! Seven planets, including Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune, will ...

The seven planets will not be perfectly aligned, but will appear in an arc across the sky due to their orbital plane in the ...