Physicists have identified possible remnants of two exploded stars, or supernovas, that were once paired before they each blew up. The discovery was made in part by using data from the Fermi Large Area Telescope.
After years of construction and months of testing, the Chilean mountaintop telescope is nearly ready to begin the most ambitious astronomical survey ever attempted.
Imagine a universe devoid of all elements apart from hydrogen, helium, and lithium. That was the state of the Universe until the formation of the first stars, around a hundred million years after the Big Bang. These stars began to forge the elements we see today through nuclear fusion and dispersed them via supernovae explosions in a process known as enrichment. Relic second-generation stars preserve the elements produced by the first stars. They allow us to study initial enrichment in detail.
