Fluffy strands of cosmic gas and dust illuminated by bright young stars form a beautiful cloudscape in a neighboring nebula. Young stars enveloped in a transformative cocoon of gas shine brightly ...

121, No. 878, 2009 April The Origin and Shaping of Planetary Nebu... ABSTRACT.Planetary nebulae (PNs) are circumstellar gas ejected during an intense mass-losing phase in the lives of asymptotic giant ...