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Gravitational collapse of a massive star, resulting in a Type II supernova. Gravitational collapse is the contraction of an astronomical object due to the influence of its own gravity, which tends to draw matter inward toward the center of gravity. [1] Gravitational collapse is a fundamental mechanism for structure formation in the universe.
In 1939, it was estimated at 0.7 solar masses, called the TOV limit. In 1996, a different estimate put this upper mass in a range from 1.5 to 3 solar masses. [3] The maximum observed mass of neutron stars is about 2.14 M ☉ for PSR J0740+6620 discovered in September, 2019. [4] In the theory of general relativity, a black hole could exist of ...
Simulated collision of two neutron stars. A stellar collision is the coming together of two stars [1] caused by stellar dynamics within a star cluster, or by the orbital decay of a binary star due to stellar mass loss or gravitational radiation, or by other mechanisms not yet well understood.
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Griffith Observatory is an observatory in Los Angeles, California, on the south-facing slope of Mount Hollywood in Griffith Park.It commands a view of the Los Angeles Basin including Downtown Los Angeles to the southeast, Hollywood to the south, and the Pacific Ocean to the southwest.
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The spacecraft cemetery, known more formally as the South Pacific Ocean(ic) Uninhabited Area, [1] [2] is a region in the southern Pacific Ocean east of New Zealand, [3] where spacecraft that have reached the end of their usefulness are routinely crashed.