Hands-on astronomy

The Presolar Grain Workshop that gathers scientists who study tiny bits of stars that were born and died billions of years ago — before the formation of the solar system — is returning to Washington University in St. Louis this year. Sessions begins at 8:30 a.m. Saturday, Jan. 28, and continue through the weekend in Crow and Compton halls. Attendees will include 45 astrophysicists from WUSTL’s Laboratory for Space Sciences and other research institutions in the United States as well as from Australia, Brazil and Italy.