Neutron stars are extremely dense objects -- a teaspoon would weigh about a billion tons, or as much as a mountain.
Their gravity pulls surrounding material from companion stars onto them, and as this material is tugged on, it heats up and glows with X-rays.
But as the neutron stars "feed" on the matter, there comes a time when the resulting X-ray light pushes the matter away.
Astronomers call this point -- when the objects cannot accumulate matter any faster and give off any more X-rays -- the Eddington limit..."
Read on!
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