One of the great curiosities in solar science is that our Sunт??s outer atmosphere т?? the corona т?? is heated to millions of degrees when its visible surface is "only" about 10,800ТА F (6000ТА C). Even stranger is a curious temperature minimum of 7200ТА F (4000ТА C) lying between the two layers, in the chromosphere. Now, using ESAт??s Herschel space observatory, scientists have made the first discovery of an equivalent cool layer in the atmosphere of the Sun-like star, Alpha Centauri A. // ESA