An Asteroid Will Block Our Brightest Star on Monday, And Astronomers Need Your Help - 02-17


Sirius, a double-star system and the brightest object in the night sky, will briefly blink out of existence for parts of Earth on Monday evening. In an event called an occultation – when one object in space blocks the light of another behind it – a small asteroid known as (4388) Jürgenstock will slip in front of the star for a fraction of a second and, like an eclipse, cause it to briefly dim or even disappear.