Making the paper: Keivan Stassun.

The article reports that a team led by Keivan Stassun, an astronomer at Vanderbilt University in Nashville, Tennessee, has discovered two newborn twin stars that are not all that identical. The finding suggests that twins may have been born several hundred thousand years apart. The team gathered spectra and took images of two sibling stars, called Par 1802, within the Orion Nebula. The two stars are nearly identical in mass, which qualifies them as identical twins, but one is significantly warmer and brighter than the other, and also potentially bigger in diameter.