At just 25, Cecilia Payne-Gaposchkin applied quantum physics to a treasure trove of astronomical observations to show that stars are mostly hydrogen and helium.

Center Line Public Library • Baby and toddler play group 11 a.m. Tuesdays. Children up to 36 months and their caregivers participate in stories, songs and play. • Storytime at 11 a.m. Wednesdays or 5 ...