Explore the 25 strangest scientific theories ever proposed, from phlogiston to the hollow Earth. Discover how bizarre ideas ...

Under police escort in the early hours of Friday, the Bayeux Tapestry arrived back in Britain after an absence of almost 1,000 years.

It was a matter of simple arithmetic: "Solar eclipses only happen at new moon and lunar eclipses only at full moon, and there ...

This real-photo postcard view looks east on Oak Street and was probably taken around 1910. It has been over-printed with a comet, moon, and stars. They were artistically added to ...

Halley’s Comet has returned for generations, linking ancient observers with future skies. Its 76-year orbit, 1986 spacecraft encounters, 2061 return, and meteor showers reveal how one comet became ...

Comet 10P/Tempel 2 is set to be visible from Earth for the first time in years. Here's what to know about it.

Overhead in the weeks leading up to the battle was an amazing celestial spectacle: Halley’s Comet. The comet did not receive ...

Comet 10P/Tempel 2 is currently offering skywatchers a rare opportunity to observe its unique dust trail, described as resembling Saturn's rings seen edge-on. This ancient ribbon of larger particles, ...

Now is your chance to see a comet that takes more than five years to return to Earth's cosmic neighborhood. Here's what to ...