Apparently the youngest known pulsing neutron star (called a pulsar) has been letting out powerful bursts of X-rays. According to NASA, this occurance offers insight into the life cycle of these stars as they are watching them "literally change into another right before [their] very eyes". Neutron stars have extremely strong magnetic fields (by Earth standards) and there are almost 1,800 known pulsars in the galaxy. Neutron stars are formed when an huge star explodes as a supernova and leaves behind an "ultradense core". Check it out:
http://www.astronomy.com/asy/default.aspx?c=a&id=6651
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