Space exploration and travel
A new study suggests also looking for "bioessential" elements when searching for alien life.
Just as sailors can look to constellations for their bearings, interplanetary travelers could use pulsars to navigate the universe.
Enjoy a rainbow of pictures this month, featuring Hubble's 28th anniversary image and the richest image of the Milky Way Galaxy yet.
On an April weekend, engineers, designers and astronauts-in-training met to test suits for commercial, suborbital spaceflight.
We explore how powerful your laser needs to be to get noticed on Mars and beyond.
We start the year with a selection of images that look toward distant stars.
Strange alien sights from our solar system and beyond.
A round-up of the latest astronomical illustrations and a salute to Cassini.
There’s a bunch of space trash floating around Earth, it’s moving superfast, and now we have lasers to help keep an eye on it.