Giant star
A Giant star is a star that has stopped fusing hydrogen in its core. More specifically, the term giant star refers to a star that belongs to the luminosity class III in the Yerkes spectral classification.
Giant Star
Related Category: Astronomy: General
see red giant.
More on Giant Star
Red Giant - star that is relatively cool but very luminous because of its great size.
A giant star in the making
KEITH COOPER
ASTRONOMY NOW
Posted: 14 April ...
Giant Star Life
Overview
A star's life is determined almost exclusively by its mass. Large stars (above about three solar masses) live much shorter and violent lives than most other, average-sized stars (such as our sun).
Red giant stars
Red Giant (RG) stars result from low- and intermediate-mass Main Sequence stars of around 0.5-5 solar masses.
Yes, there are many types of giant stars, blue-white, white, yellow, orange, and red. Yellow giants are a phase of stars with masses heavier than the sun, but it is phase that doesn't last very long, so there aren't many of them.
Giant Stars
Large, cool, highly luminous stars in the upper right of the H-R diagram. Typically 10-100 times the diameter of the sun.
Glacial Period ...
Giant stars. Stars that are swelling in size as they approach the end of their lives. Giant stars are often no more massive than the Sun but they have expanded to great size and are therefore less dense but highly luminous.
Giant Stars
High-luminosity stars that lie above the main sequence on the Hertzsprung-Russell diagram.
Gibbous ...
Red giant star: a star that is larger than the sun and red because it has a lower temperature
White dwarf star: a small star, about the size of Earth; one of the last stages of a star's life ...
Blue giant stars, or Ra-ra Rigel
Last week, we turned our ever watchful gaze toward one of the largest single objects in the universe, red giant stars. This week, we will look at the other major class of giant stars, blue giants.
RED GIANT STAR
A red giant is a relatively old star whose diameter has swollen enormously. It's temperature has also cooled appreciably, it's contracting hydrogen core has turned to helium and eventually to carbon.
Nearby Giant Stars by Brightness, Spectra, and Distance
The following giant stars are located within 100 light-years (ly), 30.7 parsecs, of Sol.
Giant Stars
(Over 3 times the mass of the Sun)
THE DEATH OF STARS
Stars expand as they grow old. As their core runs out of hydrogen and then helium, the core contacts and the outer layers expand, cool, and become less bright.
Giant Star
A dying star that has used up the hydrogen fuel in its core and has begun to expand. Giant stars are generally larger than our Sun.
Globular Cluster ...
giant star - (n.)
A type of star brighter than main sequence stars of the same spectral type.
gibbous moon - (n.) ...
giant star A star with a radius between 10 and 100 times that of the Sun.
Giant star Betelgeuse mysteriously shrinking and astronomer don't know why National Geographic - June 10, 2009 ...
Giant Stars - These tend to be more luminous than stars on the Main Sequence and often have lower temperatures than stars of comparable luminosity on the Main Sequence.
A giant star at the center of the Trifid Nebula is causing the vast cloud of gas and dust around it to fracture into smaller pockets, which are collapsing to form new stars.
A giant star with a spectral type of G. The nearest and brightest yellow giants are the two composing the double star Capella. [C95]
Yellow Spot (Macula Lutea) ...
a giant star that collapses of its own weight at the end of its normal lifetime
collimation
the act of putting a telescope's optics into perfect alignment ...
The giant star is about 7.4 times the diameter of the sun. The dynamics of the orbit indicates that the giant has a mass of 10.9 solar masses, while the smaller star is about 6.8 times the mass of the sun.
The giant star expands again, possibly up to 1.5 AU, equivalent to the orbit of Mars. It is now an asymptotic giant branch star (AGB), occupying the upper-right portion of the HR diagram.
BLUE GIANT STAR
A blue giant is a huge, very hot, very luminous, blue star. It is not a main sequence star but a post-main-sequence star. These incredibly hot stars burn helium.
As a giant star loses almost all of its remaining outer hydrogen envelope, it comes close to revealing its intensely hot core. A fast wind from the core first compresses the inner edge of the old expanding wind.
M-class giant stars trace out the shape of the new galaxy. These shine brightly in the infrared and look red to the eye - a more familiar example is the star Betelgeuse in the constellation Orion.
NGC 604, a giant star-forming region in the Triangulum Galaxy.
Stellar evolution begins with the gravitational collapse of a giant molecular cloud (GMC).
A number of giant stars appear to be K or M type stars, but also show significant excess spectral features of carbon compounds. They are often referred to as "carbon stars" and many astronomers collectively refer to them as C type stars.
Tarazed is a giant star located near the Great Rift of the summer-time Milky Way.
[ send green star]
Virva N.
red giant A giant star whose surface temperature is relatively low, so that it glows with a red color.
RED GIANT - Giant star in the later stages of stellar evolution after it has left the main sequence.
red giant stars (NASA Thesaurus) Stars whose evolution has progressed to the point where hydrogen core burning has been completed, the helium core has become denser and hotter than originally, ...
Arcturus an orange giant star about 36 light years away is the fourth brightest star in the sky. This includes the Sun. However, the combined light of the alpha centauri stars is brighter.
The star is a hypergiant star.
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M2 IV/V
The star is either a subgiant or a dwarf star.
Accretion disks around white dwarfs, neutron stars, and black holes form when material is drawn off a nearby normal or giant star. Accretion disks around neutron stars and black holes can be hot enough to radiate X-rays.
The brightness of the red giant star beta,Peg, called Scheat (the shoulder), varies irregularly between 2nd and 3rd magnitude.
The double epsilon Peg, called Enif, is a wide pair, very unequal in brightness.
Large lengths, such as the radius of a giant star or the semi-major axis of a binary star system, are often expressed in terms of the astronomical unit (AU) — ...
Medium-mass stars ( ) exhaust hydrogen in their cores, fuse hydrogen in their shells, become giant stars, undergo helium flash, fuse helium in their shells around a carbon-oxygen core.
Most of the carbon (the basis of life) and particulate matter (crucial building blocks of solar systems like ours) in the universe is manufactured and dispersed by red giant stars.
Alpha Orionis, commonly known as Betelgeuse is a red supergiant star marking the shoulder of the winter constellation Orion the Hunter.
A red giant star in Taurus. Its name is derived from Arabic "the follower", a reference to the way the star follows the Pleiades star cluster in its nightly journey across the sky.
At the end of its life, a giant star collapses and shrinks. Its mass gets more and more compressed until it is so thick that light can’t escape from it because so much material has been crammed into a small space.
Binaries, particularly those consisting of a dwarf and a supergiant star, provide the most extensive data on stellar dimensions. The angular diameters of supergiants were measured in the 1920s with the Michelson stellar interferometer.
The brightest star in the constellation is [4385] alpha Horologii, a giant star 177 light-years distant from Earth. [4387] delta Horologii, the second brightest star, is a binary star with a massive white subgiant for its primary component.
In 2007, Altair became the first star, other than a giant or supergiant star (such as Betelgeuse), to have its surface ts surface features imaged.
Deneb is a bright, blue supergiant star, very young as stars go. Albireo, the bill of the swan, is actually two stars which exhibit a spectacular amber and blue (one might even say "maize and blue") contrast.
HDE 226868 is a massive blue supergiant star; its companion is believed to be a black hole, surrounded by an accretion disc of gases from HDE 226868 which are spiraling into the black hole. The star and the black hole are in orbit around each other.
Epsilon Aurigae is clearly the larger star, and larger stars evolve faster; one theory is that it is a few times bigger than our Sun, and as it grew into a red giant star, it threw out material that collected around the smaller companion, ...
Nikola Tesla in the Colorado Springs lab recorded cosmic waves emitting from interstellar clouds and red giant stars. He observed repeating signals conducted by his transciever. He announced that he received extraterrestrial radio signals.
Giant stars are usually diffuse, however, and may be only 40 times more massive than the sun, whereas white dwarfs are extremely dense and may have masses about 0.1 times that of the sun despite their small size.
Enterprise approaches a hypergiant The rare hypergiant star is one which shares similar characteristics with a supergiant star, but is 100 times more massive than Sol. The theoretical lifespan of a hypergiant is one to two million years.
Antares is a remarkable supergiant star, several hundred times the diameter of our Sun. Beta Scorpii is called Graffias, Latin for ‘claws'. This star is sometimes also known as Acrab, from the Arabic for ‘scorpion'.
Cepheid Variable Stars: A luminous giant star whose brightness varies periodically: growing very bright quickly, and then dimming slowly. The period of variation is related to luminosity.
What color are most giant stars?
How is a red giant's low temperature produced?
Are all stars red giants?
What is a red giant?
Wmat makes up the atmosphere on Mars?
Who was Cleomedes?
What made Cleomedes famous?
Beta CMa is a pulsating giant star, and the prototype of a small class of variables. Its variations are too slight to be noticed by the naked eye, as it changes from only 1.93 to 2.00 every 6h, 2.6s.
AGB stars: Cool, luminous, and pulsating red giant stars. Most stars in the Universe that have left the main sequence will reach their final evolutionary stage as stars on the asymptotic giant branch (AGB).
As we enter the near-infrared region, the hot blue stars seen clearly in visible light fade out and cooler stars come into view. Large red giant stars and low mass red dwarfs dominate in the near-infrared.
helium flash: The explosive ignition of helium burning that takes place in some giant stars.
Herbig-Haro object: Small nebula that varies irregularly in brightness; believed to be associated with star formation.
At an age of only 25 million years, it is quite young and contains no red giant stars. M36 has a visual magnitude of 6.3 with the individual member stars ranging in magnitude from 9 to 14.
 See also: Giant, Star, Sun, Light, Earth
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