Astronomers observed a star wobbling around a spinning black hole, revealing rare evidence of Einstein’s frame-dragging ...

Quantum communication has quietly crossed a new threshold, with researchers now showing that fragile quantum states can be ...

Planetary scientists have proposed a solution to the centuries-old problem of why the Moon’s far side bulges at its equator. Ian Garrick-Bethell and colleagues at the Massachusetts Institute of ...

The first spacecraft to orbit Mercury began circling the solar system’s smallest and least-understood planet early this morning, in what mission scientists hailed as the “historic” conclusion to a six ...

In our Solar System, the planetary orbits all have a similar orientation. Their orbital planes vary by a few degrees, but roughly the planets all orbit in the same direction. This invariable plane, as ...

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Note: The following article contains spoilers about the Netflix series 3 Body Problem. I first encountered the three-body problem 60 years ago, in a short story called “Placet is a Crazy Place” by ...