A pulsar is a rapidly spinning neutron star which is the small, incredibly dense remnant of much more massive star. How dense? A teaspoon of matter from a neutron star weighs as much as Mount Everest. A neutron star containing more matter than our sun would be only about 15 miles across.
from EarthSky http://ift.tt/1H4P4Fl
A pulsar is a rapidly spinning neutron star which is the small, incredibly dense remnant of much more massive star. How dense? A teaspoon of matter from a neutron star weighs as much as Mount Everest. A neutron star containing more matter than our sun would be only about 15 miles across.
from EarthSky http://ift.tt/1H4P4Fl
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