A thin crescent Moon, Venus, and the Hyades star cluster lined up over Saint-Rémy on July 22, 1889, closely matching the ...

Bright Venus sits close to Virgo’s luminary, Spica, in the predawn sky. A lovely crescent Moon also joins the scene.

NASA has awarded a contract to execute a high-stakes orbital maneuver, racing against time and atmospheric drag to prevent a critical science asset from tumbling back to Earth. The target of this ...

Earth's satellite sits close to the Red Planet in the predawn sky, before passing both Mars and Jupiter later in the day.

Our satellite passes several planets while Venus meets Spica in a close conjunction and spooky season culminates in the sky ...

Now deeper in Leo, our satellite skims close to the bright star Regulus, standing east of Jupiter and Mars in the morning sky.

The event horizon of a nonspinning billion-solar-mass back hole has a radius of 1.8 billion miles — the distance of Uranus from the Sun.

This crescent-shaped cluster shines in northern Cassiopeia, visible all night long as the stars wheel around the North ...

Saturn is visible as darkness falls with Neptune nearby, the Full Moon crosses the Pleiades, and Mars and Jupiter dominate before dawn.

Venus’ reign is coming to an end as Mars and Jupiter enter the scene and the Moon occults Regulus in the southern sky this ...

Stunning face-on spiral M74 is visible after dark this evening, showing off its bright nucleus and fainter asymmetrical arms ...

October’s bright Full Moon offers an excellent observing target, allowing you to trace the rays thrown out by ancient impacts ...