Telescopes

Astronomers have identified a rare triple supermassive black hole system in the nearby galaxy NGC 6240, revealing three nuclei packed inside a kiloparsec and offering a new route … Dec 31, 2025

Comets Lemmon (C/2025 A6) and SWAN (C/2025 R2) are visible after sunset in the Northern Hemisphere on Oct. 23, 2025. Binoculars will help reveal their tails; this is a last good v… Nov 12, 2025