Coalsack

American  

[kohl-sak] / ˈkoʊlˌsæk /

Or Coal Sack

noun

Astronomy.

1. a dark nebula in the southern constellation Crux, whose dust particles obscure light from Milky Way stars behind it.

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Etymology

Origin of Coalsack

First recorded in 1625–35; coal + sack ¹

Example Sentences

Just east of Crux lies what appears to be a hole in the sky—a dark region devoid of stars known as the Coalsack Nebula.

From National Geographic • Aug. 23, 2023

But the Coalsack area was a space-mark good for half a sector of the galaxy.

From The Pirates of Ersatz by Freas, Kelly

Well, maybe Bill has been down to th' corner playin' a game iv spoil-five with his old frind Coalsack, an' has paid no attintion to th' Sons iv Rest.

From Mr. Dooley: In the Hearts of His Countrymen by Dunne, Finley Peter

But one knew that it was going on to Lohala and Tralee and Famagusta and the Coalsack Stars.

From The Pirates of Ersatz by Freas, Kelly

They had radio and radar twenty years ago, when Rock Morgan was here in the Coalsack.

From Space Viking by Piper, H. Beam