Hubble Reveals Small Galaxies Expel Majority of Their Oxygen

New Hubble Space Telescope research indicates small galaxies retain only about 11% of the oxygen produced by their stars, with some holding as little as 4%. This contrasts significantly with larger galaxies, which typically retain three to four times more oxygen. The study, published in The Astrophysical Journal, suggests exploding stars likely expelled most oxygen into intergalactic space, though its ultimate fate remains unknown.