Category Archives: NGC6397

Globular cluster NGC6397

ESO Press release: “Stars Too Old to be Trusted?”

NGC 6397 :: ESO Press Release

Stars Too Old to be Trusted?

A possible Stellar Solution to the Cosmological Lithium Problem

Analysing a set of stars in a globular cluster with ESO’s Very Large Telescope, astronomers may have found the solution to a critical cosmological and stellar riddle. Until now, an embarrassing question was why the abundance of lithium produced in the Big Bang is a factor 2 to 3 times higher than the value measured in the atmospheres of old stars. The answer, the researchers say, lies in the fact that the abundances of elements measured in a star’s atmosphere decrease with time…