What is the densest substance in the universe?
osmium
diamond
core of the Sun
neutron star
A neutron star is a stellar remnant of a supernova. Neutron stars are very small, but extremely dense - with a radius of only about 12–13 km (7 mi), they can have a mass of about two Suns.
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Answers by country
osmium
diamond
core of the Sun
neutron star
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