What is the approximate mass density implied by a teaspoon measurement of neutron star material?
Answer
Billions of tons.
The extreme density achieved during the collapse of a massive stellar core leads to material unlike anything experienced in normal astrophysical contexts. When matter is compressed to form a neutron star, it reaches densities where a very small volume weighs an immense amount. Specifically, the text indicates that just a single teaspoon of this ultra-compressed neutron star material would weigh billions of tons, reflecting the compression of matter to incredible levels.

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