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Artist's conception of a white dwarf, right, accreting hydrogen from the Roche lobe of its larger companion star A nova (pl. novae or novas) is a transient astronomical event that causes the sudden appearance of a bright, apparently "new" star (hence the name "nova", Latin for "new") that slowly fades over weeks or months.
V838 Monocerotis (Nova Monocerotis 2002) is a cataclysmic binary star in the constellation Monoceros about 19,000 light years (6 kpc) from the Sun. The previously unremarked star was observed in early 2002 experiencing a major outburst, and was one of the largest known stars for a short period following the outburst. [ 10 ]
Luminous red nova, an explosion thought to be caused by stellar collision Solar flares are a minor type of stellar explosion [ 1 ] Tidal disruption event , the pulling apart of a star by tidal forces
A luminous red nova (abbr. LRN, pl. luminous red novae, pl.abbr. LRNe) is a stellar explosion thought to be caused by the merging of two stars. They are characterised by a distinct red colour, and a light curve that fades slowly with resurgent brightness in the infrared. Luminous red novae are not related to standard novae, which are explosions ...
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Nova T Pyxidis – remnant. Most novae require a close binary system, with a white dwarf and a main sequence, sub-giant, or red giant star, or the merging of two red dwarfs, so probably all nova remnants must be associated with binaries. [4]
CK Vulpeculae (also Nova Vulpeculae 1670) is an object whose exact nature is unknown. [4] It was once considered to be the oldest reliably-documented nova . It consists of a compact central object surrounded by a bipolar nebula .
In the case of a nova, the infalling matter causes a hydrogen fusion surface explosion that does not disrupt the star. [ 13 ] Type Ia supernovae differ from Type II supernovae , which are caused by the cataclysmic explosion of the outer layers of a massive star as its core collapses, powered by release of gravitational potential energy via ...