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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.
The model for the formation of this category of supernova is a close binary star system. The larger of the two stars is the first to evolve off the main sequence, and it expands to form a red giant. The two stars now share a common envelope, causing their mutual orbit to shrink.
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]
Researchers have discovered a white dwarf (a dead star), with an oxygen atmosphere surrounding it -- the first of its kind. Astronomers managed to pick up the star from spectral lines: colored ...
The Crab Nebula is a pulsar wind nebula associated with the 1054 supernova.It is located about 6,500 light-years from the Earth. [1]A near-Earth supernova is an explosion resulting from the death of a star that occurs close enough to the Earth (less than roughly 10 to 300 parsecs [33 to 978 light-years] away [2]) to have noticeable effects on Earth's biosphere.
If the secondary star in the system overflows its Roche lobe, it loses mass to the primary, greatly altering their evolution. If the primary star is a white dwarf, the system rapidly develops into a Type-Ia supernova. [5] Another alternate scenario for the same system is the formation of a cataclysmic variable or a 'Nova'.
After a supernova explosion of a supergiant star, neutron stars are born from the remnants. A neutron star is composed mostly of neutrons (neutral particles) and contains a small fraction of protons (positively charged particles) and electrons (negatively charged particles), as well as nuclei. In the extreme density of a neutron star, many ...
It may not be the most appealing feature of a cruise, but ships have strict and discreet procedures to follow if someone dies on board. If you ever hear crew discussing Operation Bright Star, that ...