News

A Galaxy of Options

March 21, 2025

Dyani Sabin ’14

When astronomers assess the ages of galaxies, they look at the glow of the elements created by nuclear fusion. “Our hydrogen gas comes prebaked with the universe,” says Associate Professor of Physics Jillian Scudder. “Anything else has gone through a star, because the only way you get these heavier elements is if a star built them.”

A stylized scientific illustration of a binary star system, featuring labeled diagrams, contour lines, and celestial objects against a dark, starry background.

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