Astronomers using the Event Horizon Telescope (EHT) have uncovered a major clue in the mystery of how black holes produce immense cosmic jets. A new study, published in Astronomy & Astrophysics on ...
Over 20 years after construction began, and over six months after its dedication, the Hale Telescope saw first light on Jan. 26, 1949. It was the largest telescope in the world, employing a 200-inch ...