Collapse

Collapse
An evolved, average-size star will now shed its outer layers as a planetary nebula. If what remains after the outer atmosphere has been shed is less than 1.4 solar masses, it shrinks to a relatively tiny object (about the size of Earth) that is not massive enough for further compression to take place, known as a white dwarf.[71] The electron-degenerate matter inside a white dwarf is no longer a plasma, even though stars are generally referred to as being spheres of plasma. White dwarfs will eventually fade into black dwarfs over a very long stretch of time.


The Crab Nebula, remnants of a supernova that was first observed around 1050 AD
In larger stars, fusion continues until the iron core has grown so large (more than 1.4 solar masses) that it can no longer support its own mass. This core will suddenly collapse as its electrons are driven into its protons, forming neutrons and neutrinos in a burst of inverse beta decay, or electron capture. The shockwave formed by this sudden collapse causes the rest of the star to explode in a supernova. Supernovae are so bright that they may briefly outshine the star's entire home galaxy. When they occur within the Milky Way, supernovae have historically been observed by naked-eye observers as "new stars" where none existed before.[72]
Most of the matter in the star is blown away by the supernova explosion (forming nebulae such as the Crab Nebula[72]) and what remains will be a neutron star (which sometimes manifests itself as a pulsar or X-ray burster) or, in the case of the largest stars (large enough to leave a stellar remnant greater than roughly 4 solar masses), a black hole.[73] In a neutron star the matter is in a state known as neutron-degenerate matter, with a more exotic form of degenerate matter, QCD matter, possibly present in the core. Within a black hole the matter is in a state that is not currently understood.
The blown-off outer layers of dying stars include heavy elements which may be recycled during new star formation. These heavy elements allow the formation of rocky planets. The outflow from supernovae and the stellar wind of large stars play an important part in shaping the interstellar






Data Recovery
bathroom remodel orange county

Holland America Cruise

The Holland America also offers cruises from san diego with some as long as a full month or as short as seven days. You have the choice of a Hawaii cruise, Polynesian, Panama Canal, and Mexican Riviera. All offer their own uniqueness and various lengths of cruises. The longest cruise aboard the Holland is 31-days which sails to Hawaii, Tahiti, and Marquesas. Truly, this would be a cruise to remember!

Holland America offers different cruise liners depending on where you are heading. For instance, on their longer cruises, the ship is the HAL Rotterdam, which carries 1300 passengers and offers 10 decks, with 658 cabins and 600 crew members. Their RCL Radiance of the Seas is a larger ship with a capacity to carry 2500 passengers and offers 11 decks and over 1000 cabins.


Tattoo Removal London
vending machine parts