Black star may refer to:

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In astronomy

• Saturn, is referred to as "Black Star" in ancient Judaeic beliefs
• Dark star, a theoretical star that has a surface escape velocity that equals or exceeds the speed of light
• Black hole, any region of space time where escape to the outside universe is impossible
• Black dwarf, a type of degenerate dwarf star, specifically, a cold white dwarf.

In entertainment

• Blackstar (TV series) , a 1981 fantasy/sci-fi cartoon by Filmation
• Black Star (Babylon 5 ), a ship in the Babylon 5 science fiction universe
• Sendit.com, a UK-based online DVD and video sales company whose former name is "Blackstar"
• Black Star (Soul Eater), a Meister ninja of the Star Clan in the manga/anime Soul Eater

In music

• Blackstar (band), a heavy metal band formed by former members of Carcass
• Black Star, the initial name of Bahraini thrash metal band Motör Militia
• Black Star (hip hop group), a hip hop group formed by rappers Mos Def and Talib Kweli
• *Black Star (album), an album by the above group
• Black Star (Timati album), an album by Russian rapper Timati
• "Black Star", a song from Radiohead's album The Bends
• "Black Star", a song from Carcass' album Swansong
• "Black Star", an instrumental track from Yngwie Malmsteen's album Rising Force
• Strange Attractor/Black Star , an album by dark ambient giant Lustmord
• Black Star Deceiver, song from Soilwork's Natural Born Chaos album
• Blackstar amplification, a UK-based manufacturer of guitar amplification and effects pedals.

Other

• Black Star Line, a shipping line created by Marcus Garvey to repatriate African-Americans to Africa
• Black Star (photo agency), a New York-based photo agency founded in 1935
• Blackstar (spaceplane), a rumoured United States Air Force spaceplane
• Black Star (anarchist group), a Greek terrorist group, also known as Mavro Asteri
• Ghana national football team, whose nickname is "The Black Stars"
• Black Sex Link, a breed of poultry also known as "Black Star"
• The Chinese Type 54 pistol, also known as the "Black Star pistol"
• Black Star (perfume), the new perfume by Avril Lavigne
• Black Sun