Mysterious ‘yellowballs’ littering the Milky Way are clusters of newborn stars
The cosmic objects were thought to be gas bubbles blown by supermassive baby stars
!['yellowballs' in Milky Way, circled](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/04/041621_lg_yellowballs_feat.jpg?fit=1030%2C580&ssl=1)
The Milky Way is strewn with ‘yellowballs’ (circled in this false-color infrared panorama from the Spitzer Space Telescope), regions of ionized gas bubbles where baby stars are born.
Charles Kerton/Iowa State University, Spitzer/NASA