New research shows that most of the element ytterbium in our universe was created in supernovae. The rest of ytterbium atoms comes from the last phases of evolution of stars similar to the Sun.
Supernova remnant E0102
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Astronomers led by Byeong-Cheol Lee have made a groundbreaking discovery, detecting a brown dwarf orbiting the red giant HD 18438. With a radius of 89 times that of the Sun, HD 18438 is now the largest known star to be orbited by an exoplanet or brown dwarf.