Tag - Cosmic

Star Found Orbiting Within Another in Astonishing Cosmic First

(NASA's Goddard Space Flight Center/Chris Smith)Binary star systems—two stars gravitationally bound and circling a shared center—are far from unusual, with over half the stars in our galaxy belonging to such pairs or multi-star groups.Diverse Duos with Dramatic InteractionsThese stellar duos often differ significantly in mass, luminosity, and size, and the gravitational dynamics between them...