By imagining Earth at the center of a celestial sphere, ... oldest evidence for stellar coordinates from Hipparchus was an 8th-century A.D. Latin translation of a poem about the constellations ...

There's no shortage of round celestial objects in our universe. Planets, moons and stars all exhibit lovely spherical shapes. But astronomers recently spotted a mysteriously circular orb deep in the ...

The first videos released by the Vera C. Rubin Observatory reveal thousands of drifting asteroids, hundreds of thousands of ...

In just over 10 hours of test observations, the Vera C. Rubin Observatory captured millions of celestial objects, opening the ...

Shining brighter than magnitude –4.0 this month, Venus outshines every other celestial object except for the Sun and Moon. The planet moves eastward relative to the background stars during June.

Moscow has also warned it could begin shooting down American satellites aiding Ukraine, including SpaceX’s broadband-beaming sats, extending its military belligerence into the celestial sphere.

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It had not been thought possible that such tiny, weak stars could provide the conditions needed to form and host huge planets ...

From Mars & Regulus to Saturn near the Moon and Venus at dawn, the night sky dazzles June 13-19, 2025. Spot deep-sky gems and ...

Scientists have uncovered ancient secrets buried deep beneath the surface of the moon, thanks to China’s Chang’e-4 mission.

An accidental discovery might change how we think about one of the most mysterious structures in our solar system. The Oort ...