A conjunction is an astronomical event in which at least two planets – or, in this case, other celestial bodies – appear to our vantage from Earth to be close together in the sky. The trio of ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...

What could we choose as the seven most remarkable celestial objects visible either with our eyes or with a small telescope? "The Seven Wonders of the Ancient World" is the first known list of the most ...

The moon and Venus will shine vividly alongside a bright star in the early morning in a striking celestial rendezvous that should be visible across the U.S. But unless you're willing to wake up before ...