The Incredible Types of Novae in Our Universe !! #viralvideo #nova #trending #universe #facts #space

Novae are astronomical events that can emit gamma-rays due to the decay of radioactive nuclei synthesized during the explosion.

These explosions release prompt gamma-ray emission consisting of a 511 keV line and a continuum between 20 and 511 keV before the maximum visual luminosity of the nova is observed.

Classical nova eruptions are the most common type. This type is usually created in a close binary star system consisting of a white dwarf and either a main sequence, subgiant, or red giant star. If the orbital period of the system is a few days or less, the white dwarf is close enough to its companion star to draw accreted matter onto its surface, creating a dense but shallow atmosphere. This atmosphere, mostly consisting of hydrogen, is heated by the hot white dwarf and eventually reaches a critical temperature, causing ignition of rapid runaway fusion. The sudden increase in energy expels the atmosphere into interstellar space, creating the envelope seen as visible light during the nova event. In past centuries such an event was thought to be a new star. A few novae produce short-lived nova remnants, lasting for perhaps several centuries.
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