But that includes exoplanets, alien worlds that orbit alien suns. Only eight planets call our solar system home. Or there might still be nine if some astronomers are correct about an as-yet ...

The eight planets in our solar system orbit the sun in roughly the same plane, because they all originally formed from the same disc of debris around the sun. The line the sun traces across the ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

Uranus and Neptune are there too, technically, but they don't appear as 'bright planets'," NASA's Preston Dyches explained in a stargazing video guide. Stock illustration of all the solar system's ...

17 and 18. Timing: Dusk after sunset, but before 9 p.m. local time There are eight planets in our solar system and one dwarf planet (Pluto). Because we live on Earth, the most we could see is a ...

When to look: Mid and late January, but best visibility may be the night of Jan. 17 and 18. Timing: Dusk after sunset, but before 9 p.m. local time There are eight planets in our solar system and one ...

Planetary alignments aren't rare, but they can be when they involve six of the eight planets in our solar system. Look for a planetary parade that includes Mars, Jupiter, Uranus, Neptune ...