Euclid is on a quest to unravel one of the universe’s greatest mysteries: why it's expanding faster and faster. With help ...

With meteor showers and other celestial events lighting up the sky throughout April, astronomers predict an exciting month of ...

A dazzling celestial display is set to light up the night sky this April as Earth drifts through a dusty trail left by an ...

Rocket launches can create eerie patterns in the sky, from undulating bright-blue spirals to glowing “jellyfish” blobs.

A waxing Moon brightens the sky as we catch our last looks at Uranus and view Venus, Mercury, Jupiter, and Mars in the sky ...

Californians can glimpse up to 15 meteors each hour under cloudless skies while the Lyrid meteor shower is underway. The ...

There are plenty of planets to spot during April, too. Mars, for example, will be high overhead in the south each evening. You can identify it by its salmon-pink color, and when you do, ponder for a ...

April skies feature close planet pairings, a bright meteor shower, and stunning views of the ancient star cluster M3.

Anna Levin offers a fascinating read about our place in a mysterious world and a connection to something bigger than ...

New observations of the cosmos show that the dark energy, a mysterious force that accelerates the expansion of the universe, is evolving.

For Palo Alto's conservationists, the adoption of a "dark sky" law is a bright idea that is long overdue. But as the City ...