How heavy elements come about in the universe

Heavy elements are produced during stellar explosion or on the surfaces of neutron stars through the capture of hydrogen nuclei (protons). This occurs at extremely high temperatures, but at relatively low energies. An international ...

Astronomers find one of the first stars formed in the Milky Way

Researchers at the Instituto de Astrofísica de Canarias (IAC) have identified a star that is a key to the formation of the first chemical elements in the galaxy. The results of this research are published today in The Astrophysical ...

The universe has a lithium problem

Over the past decades, scientists have wrestled with a problem involving the Big Bang Theory. The Big Bang Theory suggests that there should be three times as much lithium as we can observe. Why is there such a discrepancy ...

How heavier elements are formed in star interiors

When the renowned cosmologist Carl Sagan declared that "we are made of starstuff," he wasn't speaking metaphorically. As Sagan said in the TV series "Cosmos," many of the elements in our bodies - "the nitrogen in our DNA, ...