coalsack
/ˈkoʊlˌsæk/
noun
- A large sack or bag used for carrying or storing coal.
- The coalsack was left by the back door for the delivery.
- She sewed a new coalsack from sturdy canvas.
- He heaved the heavy coalsack onto his shoulder.
- A dark area in the Milky Way galaxy that looks like a hole or sack, caused by a cloud of dust that blocks starlight.
- Astronomers study the Coalsack to learn about interstellar dust.
- Using a telescope, you can see the Coalsack as a dark patch among the stars.
- The Coalsack Nebula is visible in the southern sky on a clear night.