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Astronomy Picture of the Day

Discover the cosmos!Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2025 October 1
A starfield is shown that has a multi-filamentnebula flowing across it horizontally. The most prominent colors are red and blue. Please see the explanation for more detailed information.

NGC 6960: The Witch's Broom Nebula
Image Credit & Copyright:Brian Meyers

Explanation: Ten thousand years ago, before the dawn of recorded human history, a new light would suddenly have appeared in the night sky and faded after a few weeks. Today we know this light was from asupernova,or exploding star,and record the expanding debris cloud as theVeil Nebula, asupernova remnant. This sharp telescopic view is centered on awesternsegment of the Veil Nebula cataloged asNGC 6960 but less formally known as the Witch's Broom Nebula. Blasted out in the cataclysmic explosion, aninterstellar shock wave plowsthrough space sweeping up and exciting interstellar material.Imaged with narrow band filters, theglowing filaments arelike long ripples in a sheet seen almost edge on,remarkably well separated into atomic hydrogen (red)and oxygen (blue-green) gas.The complete supernova remnant lies about 1400light-years away towards theconstellation Cygnus.This Witch'sBroom actually spans about 35 light-years.The bright star in the frame is52 Cygni,visible with the unaided eye from a dark location but unrelated to the ancient supernova remnant.

Tomorrow's picture:the shadowy realm


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