Stars And Stellar Phenomena
32 entries in the Stars And Stellar Phenomena compendium.
AcruxThe southernmost first-magnitude star, a multiple system at the foot of the Southern CrossAlgolThe Demon Star: a triple-star eclipsing variable in Perseus.AsteroseismologyThe study of stellar oscillations to probe internal structure.B(e) starB-type stars with forbidden emission lines and infrared excessBe starNon-supergiant B stars with Balmer emission lines, often surrounded by a gaseous disk.Beta CentauriTriple star system and pointer to the Southern Cross.Beta PictorisA young, luminous star with a debris disk and three directly imaged planets.Black dwarfTheoretical stellar remnant: a white dwarf that has cooled to emit no significant heat or Blue giantHot, evolved stars in the blue giant region of the HR diagramBlue stragglerStars that defy standard stellar evolution in clusters.Blue supergiantHot, luminous stars often evolving from high-mass main-sequence stars.Carbon starA luminous red giant with a carbon-rich, sooty atmosphere and a strikingly ruby red appearCastor (star)The second-brightest star in Gemini, a sextuple system of three binary pairs.Cassiopeia AThe brightest extrasolar radio source below 1 GHz, a supernova remnant in Cassiopeia.Classical Cepheid variableClassical Cepheids are standard candles for measuring cosmic distances.Crab PulsarThe Crab Pulsar: a young neutron star at the heart of the Crab Nebula, discovered in 1968 CW LeonisA variable carbon star embedded in a thick dust envelope, discovered in 1969 by Becklin anDouble starA double star is a pair of stars that appear close together as viewed from Earth, either aEffective temperatureBlack-body temperature matching a star or planet's radiated energy.Epsilon Canis MajorisThe second-brightest star in Canis Major, a blue-white binary that was once the brightest Flare starA variable star that undergoes unpredictable dramatic increases in brightness, powered by Gamma CassiopeiaeA multiple star system and prototype Be star at the heart of Cassiopeia's W.Hayashi trackThe nearly vertical path of infant stars on the HR diagram.Helium flashA brief, intense runaway fusion of helium in the degenerate core of low-mass stars.Herbig Ae/Be starPre-main-sequence stars of spectral types A or B, still embedded in gas and dust.Herbig–Haro objectBright patches of nebulosity associated with newborn stars, formed by high-speed jets collHorizontal branchA stage of stellar evolution powered by core helium fusion, following the helium flash at HypergiantThe rarest and most luminous stars, teetering on the edge of stability.Instability stripA region of the Hertzsprung–Russell diagram where pulsating variable stars are found, drivLBV 1806−20A candidate luminous blue variable and likely binary star.Light curveGraph of celestial light intensity over time.Luminous blue variableRare, massive, evolved stars with unpredictable brightness variations.
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