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.

2024 June 25
A busy starfield is shown which an elongated brown 
nebula running diagonally from the lower left to the 
upper right. A bright blue star and a star cluster 
appear above the nebula. 
Please see the explanation for more detailed information.

The Dark Doodad Nebula
Image Credit & Copyright: Martin Pugh & Rocco Sung

Explanation: What is that strange brown ribbon on the sky? When observing the star cluster NGC 4372, observers frequently take note of an unusual dark streak nearby running about three degrees in length. The streak, actually a long molecular cloud, has become known as the Dark Doodad Nebula. (Doodad is slang for a thingy or a whatchamacallit.) Pictured here, the Dark Doodad Nebula sweeps across the centre of a rich and colourful starfield. Its dark colour comes from a high concentration of interstellar dust that preferentially scatters visible light. The globular star cluster NGC 4372 is visible as the fuzzy white spot on the far left, while the bright blue star gamma Muscae is seen to the cluster's upper right. The Dark Doodad Nebula can be found with strong binoculars toward the southern constellation of the Fly (Musca).

Tomorrow's picture: sky show


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