Circumstellar disks

theoretical cloud of planetesimals at the far edge of the solar system

Vega is the brightest star in the northern constellation of Lyra. It has the Bayer designation α Lyrae, which is Latinised to Alpha Lyrae and abbreviated Alpha Lyr or α Lyr. This star is relatively close at only from the Sun, and one of the most luminous stars in the Sun's neighborhood, being intrinsically brighter than any star nearer to the sun. It is the fifth-brightest star in the night sky, and the second-brightest star in the northern celestial hemisphere, after Arcturus.

Fomalhaut (, ) is the brightest star in the southern constellation of Piscis Austrinus, the Southern Fish, and one of the brightest stars in the night sky. It has the Bayer designation Alpha Piscis Austrini, which is an alternative form of α Piscis Austrini, and is abbreviated Alpha PsA or α PsA. This is a class A star on the main sequence approximately from the Sun as measured by the Hipparcos astrometry satellite. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.

structure formed by diffuse material in orbital motion around a massive central body

thumb|300px|right|Debris disks detected in HST archival images of young stars, HD 141943 and HD 191089, using improved imaging processes (24 April 2014). thumb|486958 Arrokoth, the first pristine planetesimal visited by a spacecraft.

rotating circumstellar disk of dense gas surrounding a young newly formed star

Red dwarf star in the constellation Libra

star in the constellation Cetus

star in the southern constellation Eridanus

astronomical theory that the Solar System formed from nebulous material

Denebola is the second-brightest star in the zodiac constellation of Leo. It is the easternmost of the bright stars of Leo. It has the Bayer designation Beta Leonis or β Leonis, which are abbreviated Beta Leo or β Leo. Denebola is an A-type main sequence star with 75% more mass than the Sun and 15 times the Sun's luminosity. Based on parallax measurements from the Hipparcos astrometry satellite, the star is at a distance of from the Sun. Its apparent visual magnitude is 2.14, making it readily visible to the naked eye. Denebola is a Delta Scuti type variable star, meaning its luminosity varies

torus, pancake or ring-shaped accumulation of matter in orbit around a star

binary star system

star in the constellation Pegasus

star in the northern constellation of Auriga

star in the constellation Pictor

star in constellation Fornax

location in the extreme Solar System

circumstellar disk of dust and debris in orbit around a star

brown dwarf

star in the constellation Triangulum Australe

star in the constellation Boötes

star in the constellation Virgo

star in the constellation Eridanus

star in the constellation Triangulum Australe

star in the constellation Draco

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star in the southern constellation of Puppis

star in the constellation Hydra

star in the constellation Microscopium

star and planetary system in the Milky Way galaxy

star in the constellation of Corvus

star in the constellation Capricornus

star in the constellation Crater

star in the constellation Tucana

star in the constellation Taurus

pre-main-sequence star surrounded by a dense protoplanetary disk

star in the constellation Serpens

T Tauri-type star

star in the constellation Lepus

star in the constellation Boötes

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variable star in the constellation Dorado

star in the constellation Ursa Minor

star in the constellation Ursa Major

star in the constellation Ophiuchus

star in the constellation Andromeda

star in the constellation Auriga

star in the constellation Octans

star in the constellation Dorado

star in the constellation Coma Berenices

BD+20°307 is a close binary star system approximately 300 light-years away in the constellation Aries. The system is surrounded by a dusty ring, and probably orbited by a 0.48 white dwarf on a wide (980 AU) orbit.

nearby star in the constellation Lupus

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star in the constellation Eridanus

star in the constellation Ursa Major

star in a binary system in the constellation Pavo

star in the constellation Piscis Austrinus