I was reading today this article on space.com about the discovery of a Neuron star which is formed when a star burn out and collapses into itself but somehow it does not become a black hole as previously thought stars always did.

Let me give you some numbers: Our beloved Sun is huge. “The Sun’s radius (the distance from its center to its surface) is 695,508 km (432,169 mi), 109 times as large as Earth’s radius. If the Sun were hollow, a million Earths could fit inside it. The Sun is 333,000 times as massive as Earth is .“ (data by Encarta )

Now imagine a star 40 times bigger than the Sun that has imploded into a ball about 12 miles in diameter. According to space.com, a teaspoon of the dense stuff would weigh about a billion tons on Earth.
Isn’t this amazing?