The spiral arms of NGC 4571 are dotted with pink nebula, heated by searing ultraviolet light from the young stars at their cores ⭐ However, stars are born in very different environments – giant molecular clouds in which the temperature hovers just a few tens of degrees above absolute zero. The transformation from freezing gas cloud to fiery young star happens thanks to gravity, which causes these clouds to collapse and heat up 🌡️ until they are hot enough to spark nuclear fusion and start to sh