Researchers from Skoltech, the University of Warsaw, and the University of Iceland have demonstrated that by optical means it is possible to excite and stir an exciton-polariton condensate, which ...

Polaris's proximity to the North Celestial Pole varies due to Earth's precessional wobble, a cyclical shift of its rotational axis. This precession, caused by gravitational forces from the Sun and ...

Earth's axial precession, a slow wobble of its rotational axis, is analogous to the gyroscopic motion of a spinning top. The primary cause of Earth's precession is the gravitational influence of the ...

Astronomers have made the first direct observation of a spinning black hole twisting the very fabric of spacetime, a ...