Blue star or bluestar may refer to: *

O-type star An O-type star is a hot, blue-white star of spectral type O in the Yerkes classification system employed by astronomers. They have temperatures in excess of 30,000 kelvin (K). Stars of this type have strong absorption lines of ionised helium, ...

(a.k.a. blue star), a stellar classification

Animals

* ''

Linckia laevigata ''Linckia laevigata'' (sometimes called the "blue ''Linckia''" or blue star) is a species of sea star in the shallow waters of tropical Indo-Pacific. Description and characteristics The variation ("polymorphism", in this case, a "color morph ...

'', a sea star from the Indian and West Pacific Oceans * '' Phataria unifascialis'', a sea star from the East Pacific

Businesses

Blue Star (company) Blue Star Ltd is an Indian multinational home appliances company, headquartered in Mumbai. It specializes in air conditioning, commercial refrigeration and MEP (mechanical, electrical, plumbing and firefighting). It is the country's second l ...

, an Indian Air conditioning company *

Blue Star Ferries Blue Star Ferries is a brand name of Blue Star Maritime S.A. The company operates ferry services from the Greek mainland to the Aegean Islands. Blue Star Ferries is the biggest ferry company in Greece, serving more than 20 destinations. Their f ...

, a Greek ferry company * Blue Star Infotech, Indian company *

Blue Star Line The Blue Star Line was a British passenger and cargo shipping company formed in 1911, being in operation until 1998. Formation Blue Star Line was formed as an initiative by the Vestey Brothers, a Liverpool-based butchers company, who had f ...

, a former British shipping company * Blue Star Productions, a publishing imprint and a division of Book World, Inc * Bluestar (bus company), based in Southampton, England * Bluestar Company, a predecessor of

ChemChina China National Chemical Corporation, commonly known as ChemChina, is a Chinese state-owned chemical company in the product segments of agrochemicals, rubber products, chemical materials and specialty chemicals, industrial equipment, and petroch ...

Military

Operation Blue Star Operation Blue Star was the codename of a military operation which was carried out by Indian security forces between 1 and 10 June 1984 in order to remove Damdami Taksal leader Jarnail Singh Bhindranwale and his followers from the building ...

, a 1984 Indian military operation * Blue stars used on

service flag A service flag or service banner is a banner that family members of those serving in the United States Armed Forces can display. The flag or banner is officially defined as a white field with a red border, with a blue star for each family member s ...

s denote a United States service member fighting in a war **

Blue Star Memorial Highway Blue Star Memorial Highways are highways in the United States that are marked to pay tribute to the U.S. armed forces. The National Council of State Garden Clubs, now known as National Garden Clubs, Inc., started the program in 1945 after World W ...

, a system of highway markers honoring veterans ** Blue Star Mothers Club, a non-profit military support group

Music

* "Blue Star" (song), first recorded 1955 * ''Blue Star'' (album), is an album by Levinhurst

Plants

* ''

Amsonia ''Amsonia'' is a genus of flowering plants in the dogbane family, Apocynaceae, first described as a genus in 1788. It is native primarily to North America with one species in East Asia and another in the eastern Mediterranean The Mediterra ...

'', plant species also named "bluestar" ** Hubricht's Bluestar (''Amsonia hubrichtii''), plant * ''

Isotoma axillaris ''Isotoma axillaris'', commonly known as rock isotome or showy isotome, is a small herbaceous perennial in the family Campanulaceae. It usually has blue or mauve star-shaped flowers from September to May. It may also be called blue star, star flo ...

Others

* ''The Blue Star'' (novel), a 1952 fantasy novel by Fletcher Pratt * Newcastle Blue Star F.C., English association football team * Blue star, the logo of

Newcastle Brown Ale Newcastle Brown Ale is a brown ale, originally brewed in Newcastle upon Tyne, England. Launched in 1927 by Colonel Jim Porter after three years of development, the 1960 merger of Newcastle Breweries with Scottish Brewers afforded the beer natio ...

* BlueStar PR, Jewish political organization * Tesla BlueStar, code name for the Tesla Model 3 electric car * Blue Star Wicca, a sect of traditionalist witches * Blue Star, a nickname for the United States

business band In the United States, the business band is the colloquial name used by radio users who utilize, and scanner hobbyists who listen to, the Federal Communications Commission (FCC) Industrial/Business pool frequencies. The regulations listing frequen ...

frequency of 467.925 MHz * Blue Star (SLV), satellite launcher * Blue star tattoo legend * Blue Star, a type of

Multiple working On the UK rail network, multiple working is where two or more traction units (locomotives, diesel multiple-units or electric multiple-units) are coupled together in such a way that they are all under the control of one driver ( multiple-unit ...