A region where stars appear to be especially numerous and close together.
- ‘And if you live under deep darkness, you can see vast star clouds of the Milky Way silently boiling up in the south.’
- ‘A trio of massive, young star clusters found embedded in a star cloud may shed light on the formation of super-star clusters and globular clusters.’
- ‘That smudge is the nucleus of another galaxy, at least as large as our own, and two hundred times farther from us than the Sagittarius star cloud.’
We take a look at several popular, though confusing, punctuation marks.