The signal, from two merging black holes 3 billion light-years away, is the most distant observation yet.
Yuen Yiu, Staff Writer
This month's extraterrestrial wonders include a dune-swept Martian beach, a polar view of Jupiter, and a young planetary system that seems to glare like a demonic eye.
Abigail Malate, Staff Illustrator
Scientists test materials to withstand Mars’ surface and space.
Jason Socrates Bardi, Editor
This month's featured images include a commemorative portrait of the spacecraft Cassini and a composite image of dark matter.
A team of scientists develop a model that describes the accelerating expansion of the universe without the need for mysterious dark energy.
Ramin Skibba, Contributor
Saturn's rings, Mars' geology and an artist's depiction of distant new worlds were among this month's most captivating space images.
Access to a dark night sky is a universal human right, says the American Astronomical Society
A stellar explosion in the constellation Cygnus could be visible to the naked eye.
Pioneering astronomer who discovered observational evidence of the existence of mysterious dark matter in the universe dies at 88.
Inside Science is an editorially independent news service of the American Institute of Physics