universetoday.com
Superbubble Complex N44 - Universe Today
The powerful Gemini telescope produced this amazing photograph of the N44 superbubble complex (also known to astronomers as NGC 1929). A cluster of hot, young stars have pushed out a cavernous bubble in this nebula 325 by 250 light-years across. Additional smaller bubbles can be seen inside the nebula, which could have been formed by collapsing gas and dust.