A reminder that there is more going on in the universe than we ordinarily perceive
Precisely when and where eclipses occur is a complicated business
Probably not, but forthcoming commercial satellite constellations herald a new era for our night skies
Stunning new images of young planetary systems create a profound cosmic perspective
A first look at the foundations of a 40-meter-class telescope
Time to bring the search for extraterrestrial technosignatures all the way in from the cold
The time is ripe for getting really serious about other worlds, and other life
Is a deliberately shining satellite in the sky a cute idea or a menace?
One year, so much science. Here's the first of three spectacular, but less widely seen, images from the near and far universe
Radar maps of asteroids reveal an array of gnarled, bumpy, and bizarre objects
The second-closest, properly sunlike star seems to be at least as interesting as the Alpha Centauri stars
The rare spectacle of a total solar eclipse has given scientists throughout history fleeting opportunities to delve into everything from the sun’s chemistry to Einsteinian relativity to Earth’s place in the solar system...
A remarkable new image reveals the teething pains of an entire planetary system
When is a planet a planet? Always, whether it's a hecto-planet or a milli-planet
Vibrant images of our planet are common now, but it was only 70 years ago when we first caught a glimpse of Earth from a height of more than 100 miles. Watch a history of photographing Earth, from the first captured German rockets to iconic images like Earthrise and the Pale Blue Dot...
18 years of Hubble Telescope data on a star system reveals a surprising phenomenon spanning tens of billions of miles
An extraordinary new image shows a protostellar disk fragmenting into multiple stars
As All Hallow's Eve approaches, take a look at what's brewing in the cosmic night
Astronomers obtain convincing evidence of a potentially habitable world around our nearest neighboring star—this could change everything
What are some of the most intriguing and unexpected puzzles about the universe?