The bright morning star Venus crosses from Aries into Taurus, closing in on Uranus for a conjunction later this week.

Felton Davis offered thousands of strangers a close-up view of the Moon and planets orbiting New York City. Now he’s passing ...

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

The Axiom Mission 4 launch sent an international crew to the ISS, advancing commercial spaceflight and preparing for the ...

Machine learning can help tighten constraints on the overarchingFor almost as long as humans have existed, we have been trying to make sense of the cosmos. What started as philosophical musing has, ...

Friday, July 4 Mercury reaches its greatest eastern elongation from the Sun, standing 26° from our star at 1 A.M. EDT. We’ll ...

The star Polaris marks the North Celestial Pole in our sky, around which all other objects in the heavens appear to rotate.

Humanity’s need to track the Moon’s changing phases and motions is ancient. Mammoth hunters used the Moon as a timekeeper, carving crescent-shaped notches into bone and tusk.

Mercury hovers above the horizon near a four-percent-illuminated Moon, whose darkened face may be lit by earthshine.

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

The breathtaking celestial displays known as the aurorae — the aurora borealis in the Northern Hemisphere and the aurora ...

Keenan’s System is a faint pair of interacting galaxies in Ursa Major, joined by a 22,000-light-year bridge of glowing ...