Astronomy & Space

Astronomy may well be the oldest science of all, seeking answers to questions such as: "Where did it all come from?" and "Are we alone?" But, today's astronomers are focusing on phenomena our forbearers never imagined—planets orbiting other stars, for example; black holes the size of our solar system; galaxies being driven apart by invisible "dark energy"; ripples in the fabric of space and time; and of course the big bang, where time itself began.

Is the universe infinite and will it last forever?

Is the universe infinite and will it last forever? Saul Perlmutter, a professor of physics at the University of California, Berkeley, answers your question in this special "Mysteries of the Cosmos" edition of Ask a Scientist

Ripples of gravity, flashes of light

On Aug. 17, 2017, the Laser Interferometer Gravitational-wave Observatory (LIGO) and Virgo detected, for the first time, gravitational waves from the collision of two neutron stars

LIGO Detection

LIGO Detection reveals what unfolded behind the scenes between the detection of merging black holes on 14 September 2015, and five months later when LIGO announced it to the world.

NSF Science Now: Episode 50

In this week's episode, we learn how AI uncovers insights into cancer, how loops give toughness to spider silk, a newly released database of stars and finally, we investigate a novel water testing technique. Check it out!

Women engineers discuss ‘Hidden Figures’ and lingering challenges

The nonfiction book and its film counterpart "Hidden Figures" revealed the genius behind the American space race in the 1960s: a cohort of black women who, despite segregation and discrimination, applied their genius in math and engineering to help send our rockets and astronauts into space and bring them back safely.