Digital illustration of the Solar system. Sun, Earth and planetary Moon, Mars, Jupiter, Saturn, Uranus, Neptune and the dwarf Pluto. A row of planets and a stellar nebula in outer space These ...

Planetary alignments occur when multiple planets from our solar system appear together in the night sky. There are four major categories of planetary alignments: mini (3 planets), small (4), large ...

The year also features prime aurora viewing in January and two supermoons.

The summer months offer a great time to view the night sky. Starting this weekend and into next week, there is a great opportunity to view a nighttime double-header, the unique alignment of six ...

Did you miss the start of the planetary alignment last week? Well, don't worry, you'll still have a few more days to see it before the month is up. But this will be your last chance for the year.

The internet has been abuzz with the possibility of sky watchers seeing a “smiley face” in the eastern sky above the horizon on Friday morning before dawn. Just so you know, some of the graphics used ...

The “planet parade” happening all week will enter its most photogenic phase on Tuesday, Aug. 19, as Mercury becomes more prominent and the moon wanes to a slim crescent. All this week, four planets ...

Amateur astronomers (who're you calling amateur?) and casual skywatchers alike are in for a treat this month as the night sky transforms into a pretty busy playground. From a rare six-planet alignment ...

Astronomers studying the outer solar system say the unusual alignment of distant objects points to the influence of Planet 9.

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...