An astronaut can hold a tool in space, loosen their fingers, and watch it stay put. Nothing drops. Nothing tugs downward. Yet ...
When astronaut Alexander Gerst squeezed a specially designed instrument aboard the International Space Station in 2018, his ...
Measuring the strength of gravity is extraordinarily difficult, and different experiments have always disagreed – but a new ...
Gravity, electromagnetism, the strong nuclear force, the weak nuclear force. For decades, physicists have recognized exactly ...