Complex sentence: Willman 1 or SDSS J1049 +5103 is an extreme globular cluster or ultra low-mass dwarf galaxy discovered by a team led by Beth Willman of New York University, using Sloan Digital Sky Survey data.
Split into simpler sentences: Willman 1 or SDSS J1049 +5103 is an extreme globular cluster or ultra low-mass dwarf galaxy. It is named after Beth Willman of New York University, the lead author of a study based on the Sloan Digital Sky Survey data.