News

Astronomer solves mystery of ‘born again’ stars with Hubble

7 December 2015 Astronomy Now

University of Texas astronomer Natalie Gosnell has used the Hubble Space Telescope to better understand why some stars aren’t evolving as predicted. These so-called “blue stragglers” look hotter and bluer than they should for their advanced age. It’s almost as it they were somehow reinvigorated to look much younger than they really are.

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The lives of sibling stars in open cluster IC 4651

19 August 2015 Astronomy Now

Most stars form within clusters and these clusters can be used by astronomers as laboratories to study how stars evolve and die. The cluster captured here by the Wide Field Imager (WFI) at ESO’s La Silla Observatory is known as IC 4651, and the stars born within it now display a wide variety of characteristics.