For generations, humanity has stared into the velvet abyss of the night sky, asking the same existential question: are we truly alone? In just a few days, that query may finally move from the realms ...

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 ...

3I/ATLAS captured the world's attention last month as the comet raced past the Earth, but some believed that it could have ...

The rare 3I/ATLAS alignment on Jan. 22 coincides with the 'opposition surge' phenomenon. Learn the mystery of this 13-billion-year-old visitor.

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The solar system suddenly has a new member. A new object ...

Add Yahoo as a preferred source to see more of our stories on Google. Digital art of distant planet - Dottedhippo/Getty Images On August 24, 2006, our solar system lost a planet. It wasn't by ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

Astronomers have revealed new research showing that millions of new solar system objects are likely to be detected by a brand-new facility, which is expected to come online later this year.

Voyager 1, launched in 1977, has traveled farther than any spacecraft in human history. After more than four decades of silent endurance through space, it now sails beyond the orbit of the outer ...