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The most massive main sequence star is Theta Orionis C, in the Trapezium Cluster. Spica is also a massive blue main sequence star. Stars like this would become stars like VY Canis Majoris, the largest star known, near the end of their lives.
Brightness is relative to a stars luminousity and the distance between the Earth and the Star.
From Earth Arcturus is the brightest with an apparent magnitude of −0.04 (The Sun in comparison is -26.73).
In absolute brightness, a supergiant in the same place as the Sun - apart from cooking us - will be about 20,000 times brighter.
Typically,giant stars have radii between 10 and 100 solar radii and luminosities between 10 and 1,000 times that of the Sun.
Whereas Supergiants have a radii between 30 and 1,000 solar radii and luminosities between 30,000 and 100,000 times that of the Sun
Red Giant stars are above the lower right portion of the Hertzsprung-Russell diagram because they are low (comparatively) temperature, fairly long lived stars. The burn their nuclear fuel sparingly.
The super-giant stars are above the Main Sequence, having higher luminosity, but burn through their nuclear fuel relatively quickly, and therefore are shorter lived. The exceptions are the red super-giants, which burn slower and are longer lived. They are above the right end of the diagram.
On a Hertzsprung-RussellDiagram, the stars that areof the largest radii arefound mainly towards the upperright. They are "supergiant stars".
Also, some supergiant stars are found around the centre of the upper region of the H-R diagram.
These diagrams are essential in astronomy. They help to show some of a star's fundamental properties.
Supergiants are the most massive stars, occupy the top region of Hertzsprung-russell diagram . Supergiants can have 10 to 70 solar masses and luminosity up to hundreds of thousands times the solar luminosity and because of their large masses they have lifespan of few million years and may be less than this value .
Supergiants [See Link] are among the most massive of stars. The most luminous Supergiants are often classified as Hypergiants [See Link] they can have masses from 10 to 70 Suns and brightness from 30,000 up to hundreds of thousands times the Sun.
Because of their extreme masses they have short lifespans of 30 million years down to a few hundred thousand years.
A Super giant are among the most massive stars in our universe. In the Hertzsprung-Russell diagram they occupy the top region of the diagram. In the Yerkes spectral classification supergiants are class Ia (most luminous supergiants) or Ib (less luminous supergiants). They typically have bolometric absolute magnitudes between -5 and -12. The most luminous supergiants are often classified as hypergiants of class 0.
Aldeberan is the brightest star in the sky. Aldeberan is the tip of Taurus's horn. Aldeberan is the largest red giant, and you can fit, I think, about 100,000 Earths in its diameter.
See also related question - What is a hypergiant.
On the somewhat misleadingly named "Main Sequence", which isn't actually a "sequence" at all.
A diagram representation of the life cycle of a cockroach can be seen at a website called Vtaide. A cockroach undergoes three stages in its life cycle namely the egg, the nymph, and the adult stage.
The communication cycle is the way in which a person communicates with another person. There are 6 stages to it which ensures a message is clearly given across to some one.
The largest stars would also be the brightest and that would put them near the top of the Hertzprung Russell diagram. The Sky Catalogue 2000.0 lists 50,071 stars of brightness down to magnitude 8.0. The brightest star is Rho Cassiopeiae with an absolute magnitude of -9.5, which is about 400,000 times more luminous than the Sun, and its spectrum is G2 like the Sun.
The eukaryotic cell has 3 stages.
the stages in history of chemistry?
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http://images.google.com.au/images?q=lifecycle+of+a+star&um=1&hl=en&rlz=1T4HPAB_enAU255AU259&sa=2
It can be used to determine a Stars lifetime, its different stages.
The H-R diagram compares a star's surface temperature to its absolute brightness.
cause its life cycle appearence
The Main Sequence refers to the H-R diagram of stellar evolution (the Hertzsprung-Russell diagram). If a star is on the Main Sequence, then it is burning with the rate and temperature expected of its spectral class. Stars are divided into the following spectral classes on the H-R diagram: O, B, A, F, G, K, M O, B and A stars burn very hot because they are very large, and they are usually white/blue-white in color F and G stars (our sun is a G star) burn moderately, are moderate in size and give off yellow light K and M stars are red dwarfs. They burn slowly with red color, representing the coolest, least energetic spectrum of light. Stars which are off the Main Sequence but which are on the H-R diagram include Red Giants (like Betelgueuse and Antares), and white dwarfs, stages at the end of a star's life cycle which our sun will eventually pass through. More massive stars have different endings, including supernovae and black holes or neutron stars. These are not on the H-R diagram.
Frederick S. Russell has written: 'The eggs and planktonic stages of British marine fishes' -- subject(s): Development, Eggs, Fishes, Identification, Larvae, Marine fishes
Nowhere, it is not built yet, still in the planning stages.
A diagram representation of the life cycle of a cockroach can be seen at a website called Vtaide. A cockroach undergoes three stages in its life cycle namely the egg, the nymph, and the adult stage.