NASA and ESA are celebrating the Hubble Space Telescope's silver anniversary of 25 years in space by unveiling some of nature's own fireworks a giant cluster of about 3,000 stars called Westerlund 2. The cluster resides inside a vibrant stellar breeding ground known as Gum 29, located 20,000 light-years away in the constellation Carina. The comparatively young, 2-million-year-old star cluster contains some of our galaxy's hottest, brightest, and most massive stars. The largest stars are unleashing a torrent of ultraviolet light and hurricane-force winds that etch away the enveloping hydrogen gas cloud. This creates a fantasy celestial landscape of pillars, ridges, and valleys.
Climate scientists join search for alien Earths
Nature 520, 7548 (2015). http://www.nature.com/doifinder/10.1038/520420a
Author: Jeff Tollefson
NASA initiative seeks to bolster interdisciplinary science in hunt for extraterrestrial life.
Astrophysics: Many flavours of supernova
Nature 520, 7548 (2015). doi:10.1038/520411d
Exploding stars grouped in one family because of their similarities actually form two distinct groups. This may have important cosmic implications because the explosions, called supernovae, are the primary evidence that the Universe's expansion is accelerating.Half of type Ia supernovae seem to have similar