On July 13, 1969, the Soviet Union launched Luna 15, an unmanned spacecraft seen as a rival to the American Apollo 11 mission ...

Venus is notably brighter — magnitude –4.1, far outshining magnitude 0.9 Aldebaran, the brightest star in the Taurus and ...

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

Earth’s companion has allowed astronomers to define lunar cycles, navigate without technology, and understand celestial movements.

Sweeping views of nebulae and dancing galaxies prove the telescope’s enormous field of view and ultra-high-res capabilities.

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

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

Cones outnumber rods only in the center of the retina, which is the area of greatest density. It is also the area most ...

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

Globular cluster M56 is a gorgeous object in Lyra the Lyre that anyone can observe with binoculars or a telescope.

On his first trip to the Grand Canyon Star Party, Dave Eicher joins thousands for a week of lectures, observing, and cosmic wonder.

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