Nebulae are the birthplaces of the stars, so that each nebula consists of stars born and stars not yet born.
The Universe Around Us, Chapter I (p. 67), The Macmillan Company. 1929
Nebulae are the birthplaces of the stars, so that each nebula consists of stars born and stars not yet born.
The Universe Around Us, Chapter I (p. 67), The Macmillan Company. 1929