One of the most subtle effects predicted by general relativity is a phenomenon known as rotational frame-dragging. This is caused by a massive spinning body, such as a planet, dragging space-time with ...

Called LARES, this tiny — but remarkably heavy — satellite both looks and acts like a disco ball. By bouncing lasers off its reflectors, Italian researchers are hoping to prove Einstein’s conjecture ...

A spin measured by an observer in a rotating frame appears to precess faster or slower depending on Ω, the rotational angular frequency of the frame. This can be thought of as arising from an ...