Pasadena, CAJohn Mulchaey has been appointed the new Crawford H. Greenewalt Director of the Carnegie Observatories. He is the eleventh director of the historic department, which was founded in 1904. He follows in the footsteps of such astronomical giants as George Ellery Hale and Horace Babcock. Mulchaey was appointed acting director in 2014.

Pasadena, CA— A Carnegie-based search of nearby galaxies for their oldest stars has uncovered two stars in the Sculptor dwarf galaxy that were born shortly after the galaxy formed, approximately 13 billion years ago. The unusual chemical content of the stars may have originated in a single supernova explosion from the first generation of Sculptor stars. The team, which includes Carnegie’s Josh Simon, Ian Thompson, and Stephen Shectman, will publish their work in The Astrophysical Journal on Thursday.