Learn about the filters you’ll use most often and how they work.

Two newly spotted objects in space are emitting regular pulses of radio waves—unlike anything astronomers have seen before. An extreme type of star called an ultra-long period magnetar may be the ...

Turn your phone into a portable planetarium, map the night sky and discover the best place and time to observe February's solar eclipse, with the best stargazing apps. When you purchase through links ...

Twenty-two pieces of silver bullion, including both raw ingots and flattened Viking arm rings, were discovered in the Galloway Hoard. Arm rings such as these, which are usually found in Ireland and ...