A 10-year effort to measure gravity, a fundamental force in the universe, has failed to come up with a conclusive answer.

Add Yahoo as a preferred source to see more of our stories on Google. First Lt. Maurielle Pankau, a 183rd Air Component Operations Squadron intelligence analyst planner, participates in the Shadow ...

Air Force Chief of Staff Gen. Dave Goldfein, left, chats with Air Force Secretary Heather Wilson after flying Textron's AT-6 as part of the service's light-attack experiment, held August 2017 at ...

While the U.S. Air Force hasn't closed the door to a possible light attack program, efforts to procure a new turboprop aircraft for training with allies appear to have lost steam as other priorities ...

The Air Force’s X-37B Orbital Test Vehicle will return to orbit May 16. (Jeremy Webster/ U.S. Air Force) When the secretive X-37B space plane returns to orbit on May 16, it will be carrying more ...

A Textron Scorpion aircraft sits at Holloman Air Force Base, N.M., during the light-attack experiment held in 2017. Since these demonstrations, the Air Force has changed the direction of its effort to ...

This article originally appeared in the March 11, 2019 issue of SpaceNews magazine. The U.S. Global Positioning System — the constellation of military satellites that provides positioning, navigation ...

The universe is generally believed to be expanding at an accelerating rate, thanks to a mysterious force dubbed dark energy. But how exactly does this force work? Researchers in the UK have conducted ...

A team of scientists has for the first time measured the elusive weak interaction between protons and neutrons in the nucleus of an atom. They had chosen the simplest nucleus consisting of one neutron ...

In the late 1980s, the U.S. Air Force faced a serious question — could its famous A-10 Thunderbolt II, nicknamed the “Warthog,” survive in modern combat? The A-10 was a slow and heavily armed aircraft ...