Atom & Cosmos

Ancient galaxies found full-grown, plus stellar hearts and Mars’ rocky past in this week’s news

Straight from the stellar heart
Astronomers studying elderly stars called red giants have discovered acoustic oscillations that travel all the way to the hearts of the stars, providing a new tool to study the deep interiors of these bodies. An international team of scientists made the discovery by analyzing data on red giants recorded with NASA’s orbiting Kepler telescope.