Gravitational Waves: Ripples in spacetime caused by massive objects moving, though these are incredibly hard to detect from distant binary black holes. Orbital Motion: Observing how the black holes ...

The Methuselah Star, also known asHD 140283, has long been a subject of fascination among astronomers. Its age, initially ...

My son is overseeing preparations at the National Cathedral in Washington, D.C., for the funeral of anthropologist Jane ...