White dwarfs

Sirius is the brightest star in the night sky, located in the southern constellation of Canis Major. Its name is derived from the Greek word (Latin script: ; ). The star is designated  Canis Majoris, Latinized to Alpha Canis Majoris, and abbreviated  CMa or Alpha CMa. With a visual apparent magnitude of −1.46, Sirius is almost twice as bright as Canopus, the next brightest star. Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B. The distance betw

type of stellar remnant composed mostly of electron-degenerate matter

Procyon () is the brightest star in the constellation of Canis Minor and usually the eighth-brightest star in the night sky, with an apparent visual magnitude of 0.34. It has the Bayer designation α Canis Minoris, which is Latinized to Alpha Canis Minoris, and abbreviated α CMi or Alpha CMi, respectively. As determined by the European Space Agency Hipparcos astrometry satellite, this system lies at a distance of just , and is therefore one of Earth's nearest stellar neighbors. A binary star system, Procyon consists of a white-hued main-sequence star of spectral type F5 IV–V, designated co

Regulus is the brightest object in the constellation Leo and one of the brightest stars in the night sky. It has the Bayer designation designated α Leonis, which is Latinized to Alpha Leonis, and abbreviated Alpha Leo or α Leo. Regulus appears single, but is actually a quadruple star system composed of four stars that are organized into two pairs. The system lies approximately 79 light years from the Solar System.

stellar remnant; white dwarf that has cooled sufficiently that it no longer emits significant light

maximum mass of a stable white dwarf star, approximately 1.4 solar masses

contraction of an astronomical object due to the influence of its own gravity

star

star in constellation Fornax

triple star system in the constellation Eridanus

recurring nova in the constellation Corona Borealis

variable star in the constellation Pegasus

planetary nebula

binary star

star in the constellation Cygnus

binary star system in the constellation Capricornus

binary star system in the constellation Reticulum

planetary nebula

binary star system in the constellation Eridanus

star in the constellation Musca

phenomenon in astroparticle physics

astronomic object class

star in the constellation Aquarius

binary star system in the constelaltion Hydra

binary star system in the constellation Aries

star

star system in the constellation Auriga

binary star in the constellation Cancer

star in the constellation Andromeda

binary star

star in the constellation Hydra

exoplanet

violent reignition of thermonuclear fusion in a white dwarf star

star in the constellation Ursa Major

star in the constellation Serpens

star in the constellation Canes Venatici

White dwarf

star in the constellation Virgo

star

binary star

binary star system in the constellation Carina

star in the constellation Sagitta

star in the constellation Draco

repulsive force in quantum mechanics

star in the constellation Cetus

star in the constellation Aquarius

double star in Scorpius

star

star in the constellation Leo

star in the constellation Ara

KOI-256 is a double star located in the constellation Draco approximately from Earth. While observations by the Kepler spacecraft suggested the system contained a gas giant exoplanet orbiting a red dwarf, later studies determined that KOI-256 was a binary system composed of the red dwarf orbiting a white dwarf.

extrasolar planet

white dwarf in the constellation Virgo

spectroscopic binary star system in the constellation Carina

star

thumb|Collapsar type based on initial mass and metallicity A collapsar is a type of black hole formed inside of a massive star that rotates at a sufficient rate to create a disk around the hole. The model for collapsars was originally developed to explain gamma-ray burst events accompanying supernovas, but the model now includes other forms. Type I collapsars form an initial neutron star but fail to go supernovae, and after a one-second delay, collapse into black holes. Type II collapsars explode, but not enough mass is ejected, and the neutron star falls back into a black hole. Type III colla

star in the constellation Virgo

star in the constellation Vulpecula

star in the constellation Hercules

star in the constellation Orion