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.

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 ...

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

SpaceX flies a national security mission, South Korea's defense agency attempts a demonstration flight, and China lines up four launches.

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

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

The Red Planet reaches the border of Cancer and Leo; tomorrow it will have crossed the line into the Lion, sharing it with ...

This small martian satellite, the mission target for MMX, is destined to be shredded, changing the Red Planet forever.