A star is a massive, luminous sphere of plasma held together by gravity. The nearest star to Earth is the Sun, which is the source of most of the energy on the planet. Other stars are visible from Earth during the night when they are not obscured by atmospheric phenomena, appearing as a multitude of fixed luminous points because of their immense distance. Historically, the most prominent stars on the celestial sphere were grouped together into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.
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Some articles on star:
... A variety of different nuclear fusion reactions take place inside the cores of stars, depending upon their mass and composition, as part of stellar nucleosynthesis ... As a result the core temperature of main sequence stars only varies from 4 million kelvin for a small M-class star to 40 million kelvin for a massive O-class star ... producing all the energy necessary to sustain the star's radiation output ...
... See also List of stars in Caelum Caelum is a faint constellation, having no star brighter than fourth magnitude ... Its brightest star is the magnitude 4.45 α Caeli ... α Cae is a white-hued main sequence star of magnitude 4.4, 66 light-years from Earth ...
... Xi Geminorum (ξ Gem) is a star in the zodiac constellation Gemini with the traditional name Alzirr ... The star has an apparent visual magnitude of 3.35, which is bright enough for it to be seen with the naked eye ... Alzirr has a stellar classification of F5 IV, which is subgiant star that is in the process of evolving away from the main sequence of stars like the Sun ...
... Lieutenant Commander Data ( /ˈdeɪtə/ DAY-tə) is a character in the fictional Star Trek universe portrayed by actor Brent Spiner ... He appears in the television series Star Trek The Next Generation and the feature films Star Trek Generations, Star Trek First Contact, Star Trek Insurrection, and ... Data is in many ways a successor to the original Star Trek's Spock (Leonard Nimoy), in that the character offers an "outsider's" perspective on humanity ...
... or Lev Grossman's Fillory, are global in scope and some, like Star Wars, Honorverse, or the Lensman series, are galactic or even intergalactic ... The classic Star Trek episode "Mirror, Mirror" introduced the Mirror Universe, in which the crew members of the Starship Enterprise were brutal rather than compassionate ... The 2009 movie Star Trek created an "alternate reality" and freed the Star Trek franchise from continuity issues ...
More definitions of "star":
- (noun): A plane figure with 5 or more points; often used as an emblem.
- (noun): A performer who receives prominent billing.
- (noun): (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior.
- (noun): A star-shaped character * used in printing.
- (verb): Feature as the star.
Example: "The movie stars Dustin Hoffman as an autistic man"
- (verb): Be the star in a performance.
- (adj): Indicating the most important performer or role.
Example: "A star figure skater"
Synonyms: leading, prima, starring, stellar
- (noun): Any celestial body visible (as a point of light) from the Earth at night.
- (noun): Someone who is dazzlingly skilled in any field.
Synonyms: ace, adept, champion, sensation, maven, mavin, virtuoso, genius, hotshot, superstar, whiz, whizz, wizard, wiz
- (noun): The topology of a network whose components are connected to a hub.
Synonyms: star topology
Famous quotes containing the word star:
“One thing about being successful is that I stopped being afraid of dying. Once youre a star youre dead already. Youre embalmed.”
—Dustin Hoffman (b. 1937)
“Firmness yclept in heroes, kings and seamen,
That is, when they succeed; but greatly blamed
As obstinacy, both in men and women,
Wheneer their triumph pales, or star is tamed
And twill perplex the casuist in morality
To fix the due bounds of this dangerous quality.”
—George Gordon Noel Byron (17881824)
“Well gentlemen, this is it. This is what weve been waiting for. Tonight your target is Tokyo. And youre gonna play em the Star Spangled Banner with two-ton bombs. All youve got to do is to remember what youve learned and follow your squadron leaders. Theyll get you in, and theyll get you out. Any questions? All right thats all. Good luck to you. Give em hell.”
—Dudley Nichols (18951960)