An article accepted for publication in the journal “The Monthly Notices of the Royal Astronomical Society” reports a study on wide binary stars. A team of researchers led by Keith Hawkins of the University of Texas, Austin, studied 25 pairs of wide binary stars identified using data collected by ESA’s Gaia space probe. Using the Harlan J. Smith telescope at the McDonald Observatory, the researchers examined in depth the chemical composition of the 50 stars, concluding that stars born together show a practically identical chemical composition, much closer than randomly chosen stars of the same type.