Online Exhibit 2 Cosmic Winds and Stellar Chemistry: How Dying Stars Share Life’s Elements

Planetary nebula Messier 76, the Little Dumbbell Nebula, shows the expanding shell of gas and particles expelled by a dying star about 3,400 light‑years away in Perseus. As the star shed its outer layers, it released atoms forged over its lifetime—including oxygen, nitrogen, and heavier elements like iron that play key roles in the chemistry of rocky planets and life on Earth. These enriched gases and particles mix into space, becoming part of new generations of stars and planetary systems. Studying particle flows and spectral fingerprints helps scientists trace how elements essential to human biology circulate through cosmic evolution.