Cones outnumber rods only in the center of the retina, which is the area of greatest density. It is also the area most heavily used by daytime, direct vision. But rods do fire during the day, ...

Today in the history of astronomy, the most prolific comet-discoverer of all time gets his start.

Several planets stand still in the sky, Titan’s shadow transits Saturn, and Venus gives Taurus a second eye in the sky this ...

Algol, also known as the Demon Star, loses some 70 percent of its light every three days. It's in Perseus the Hero, now ...

At a time of turmoil and competing visions for the agency, NASA will be led by a Trump administration cabinet member.

Quasar 0957+561, the first known gravitationally lensed quasar, lies near NGC 3079 in Ursa Major. Here's how to find and ...

The author of Gemini: Stepping Stone to the Moon, The Untold Story talks about his new book.

Trump’s Big Beautiful Bill adds $9.9 billion to NASA’s budget, reversing plans to cut the Space Launch System and Orion.

Inventor Nikola Tesla was born July 10, 1856, in what is now Croatia (then part of the Austrian Empire). In 1899, Tesla ...

Tonight's Full Moon, called the Bucky Moon, rises in the southeast and sets in the southwest, tracing a low path through the ...

The bright morning star Venus, moving quickly through Taurus, hangs in the predawn sky below the Seven Sisters open cluster.

Climbing to 60° high in the east two hours before sunrise, the constellation Andromeda lies just to the upper right of the easy-to-spot W-shaped constellation Cassiopeia. This morning, let’s enjoy a ...