The firmament is like a gigantic nest, in which lies the egg containing the yolk of the future

https://www.spaceanswers.com/news/new-component-of-milky-way-discovered/

When fates among the stars do grow,

Thou into the close nests of time dost peep;

And there, with piercing eye,

Through the firm shell and the thick white dost spy

Years to come a-forming lie,

Close in their sacred fecundine asleep.

-- Abraham Cowley (1618-1667)