P Cygni is a large, unstable blue supergiant that is evolving into a red supergiant.

It is a blue supergiant, at about 18 solar masses, shining with approximately 117, 000 times the luminosity of the Sun.

It is a noble star among other blue supergiant stars in a sense that its pulsations are powered by the nuclear reactions in the hydrogen burning shell.

* Antares ( Alpha Scorpii ) is a red supergiant star in a binary system with a hotter blue main sequence star Antares B. Antares B can therefore be termed a hot companion of the cool supergiant.

Cygnus X-1 belongs to a high-mass X-ray binary system about from the Sun that includes a blue supergiant variable star designated HDE 226868 which it orbits at about 0. 2 AU, or 20 % of the distance from the Earth to the Sun.

The compact object and blue supergiant star form a binary system that orbit around their center of mass every.

A blue supergiant, Aludra has only been around a fraction of the time our Sun has, yet is already in the last stages of its life.

Stars with 30 to 60 Solar-masses then " loop back " from swollen and cooler, red supergiant phase back into much hotter but smaller blue supergiants ; in contrast, those starting with more 60 Solar-masses remain as blue supergiants.

However, the progenitor for Supernova 1987A was a blue supergiant.

A high-mass X-ray binary ( HMXB ) is a binary star system that is strong in X rays, and in which the normal stellar component is a massive star: usually an O or B star, a Be star, or a blue supergiant.

In June 2011, a team from the University of Geneva, Switzerland, reported XMM-Newton seeing a flare that lasted four hours at a peak intensity of 10, 000 times the normal rate, from an observation of Supergiant Fast X-Ray Transient IGR J18410-0535, where a blue supergiant star shed a plume of matter that was partly ingested by the smaller neutron star with the accompanying X-ray emissions.

These stars, the massive and middle-aged blue giants, represent a transitory phase where the star is either to become a bright giant ( and eventually a planetary nebula and massive white dwarf ) or a supergiant ( and eventually a supernova or rare oxygen-neon white dwarf ) and no star remains as this kind of blue giant for very long.

While the stellar wind from a red supergiant is dense and slow, the wind from a blue supergiant is fast but sparse.

When a red supergiant becomes a blue supergiant, by contracting, the faster wind it produces impacts the already emitted slow wind and causes the outflowing material to condense into a thin shell.

As the star evolves, it may swing back and forth between red supergiant ( slow, dense wind ) and blue supergiant ( fast, sparse wind ) several times and give concentric faint shells around itself.

Inside, the walls are covered with blue and white tile, the floor with red and cream carpets.

The video signal is amplified and then switched, in synchronism with the three ultraviolet light sources which are sequenced by the rotating mirror so that during one-twentieth of a second only one wavelength, corresponding to red, green, or blue, is seen.

Each of the children invited to the concert wore a name tag marked with a red, white and blue ribbon.

It could be any color: black, red, green, blue.

The flag of Armenia consists of three equal horizontal bands of red ( top ), blue, and orange.

( red = 1, green = 2, blue = 3, yellow = 4 )

The tiles were given a metallic sheen to simulate the varying scales of the monster, with the color grading from green on the right side, where the head begins, to deep blue and violet in the center, to red and pink on the left side of the building.

Amethyst may exhibit one or both secondary hues, red and blue.

The ideal grade is called " Deep Siberian " and has a primary purple hue of around 75 – 80 %, with 15 – 20 % blue and ( depending on the light source ) red secondary hues.

Other uncommon colors include red amber ( sometimes known as " cherry amber "), green amber, and even blue amber, which is rare and highly sought after.

The peoples of the Tarim Basin in northern China are now known to be Caucasian and there were widespread attempts to keep western archeologists from testing samples such as deliberately replacing the mummies or decapitating them, even defacing ancient cave painting depictions of these people with large amounts of body hair and features such as red colored hair and blue eyes.

The area of one acre ( red ) superposed on an American football field ( green ) and association football ( soccer ) pitch ( blue ).

The insignia of Apollo 16 is dominated by rendering of an American eagle and a red, white and blue shield, representing the people of the United States, overlaying a gray background, the lunar surface.

The alpha component may be used to blend to red, green and blue components equally, as in 32-bit RGBA, or, alternatively, there may be three alpha values specified corresponding to each of the primary colors for spectral color filtering.

For some applications, a single alpha channel is not sufficient: a stained-glass window, for instance, requires a separate transparency channel for each RGB channel to model the red transparency, green transparency, and blue transparency.

Four points are marked and labeled with their coordinates: ( 2, 3 ) in green, (− 3, 1 ) in red, (− 1. 5 ,− 2. 5 ) in blue, and the origin ( 0, 0 ) in purple.

where F ' and C ' are the blue and red cadmium lines at 480. 0 nm and 643. 8 nm, respectively.

The AFL logo was incorporated into the newly minted AFC logo, although the color of the " A " was changed from blue and white to red.

The opposing armies are distinguished by the colors of their uniforms: Darius ' army in red and Alexander's in blue.

After World War I and until 1986, Accrington Corporation buses were painted in the regimental colours of red and blue with gold lining.

The yellow sphere is the redox | redox-active sulfur atom that provides antioxidant activity, while the red, blue, white, and dark grey spheres represent oxygen, nitrogen, hydrogen, and carbon atoms, respectively.

GDP Growth ( green vs. red ) and Unemployment ( blue ) since 2001

The color of the lamps varies by jurisdiction ; typical colors are blue and / or red for police, fire, and medical-emergency vehicles ; amber for tow trucks, security personnel, and construction vehicles ; green for volunteer firefighters, and violet for funerary vehicles.

alt = Sequential layers of spheres arranged from top to bottom: GRGBGRGB ( G = green, R = red, B = blue )

The result was a jersey in thick red, white and blue hoops, worn above white shorts and dark socks.

Millie Jansen, high school senior from Verboort, had the championship dollar dinner, and Jody Jaross of Hillsboro also won a blue ribbon.

Baltic amber or succinite ( historically documented as Prussian amber ) is found as irregular nodules in marine glauconitic sand, known as blue earth, occurring in the Lower Oligocene strata of Sambia in Prussia ( in historical sources also referred to as Glaesaria ).

The Dodo, who in this adaptation of the book is named Uilleam and is portrayed by Michael Gough, bears a down of brilliant blue and is one of Alice's advisers, who also took first note of her identity as the true Alice.

Other forms of agate include Lake Superior agate, carnelian agate ( exhibiting reddish hues ), Botswana agate, blue lace agate, plume agates, moss agate, tube agate ( with visible flow channels or pinhole-sized ' tubes '), fortification agate ( which exhibit little or no banding structure ), fire agate ( which has internal flash or ' fire ', the result of a layer of clear agate over a layer of hydrothermally-deposited hematite ), Mexican crazy-lace agate, which often exhibits a brightly colored, complexly banded pattern ( also called Rodeo Agate and Rosetta Stone depending on who owned the mine at the time ).

Beavis also wears a blue Metallica shirt with gray shorts.

Bombay Sapphire also showcases the designers ' work in the Bombay Sapphire endorsed blue room, which is actually a design exhibition touring the world each year.

There are at least three distinct subspecies: B. m. musculus of the North Atlantic and North Pacific, B. m. intermedia of the Southern Ocean and B. m. brevicauda ( also known as the pygmy blue whale ) found in the Indian Ocean and South Pacific Ocean.

Authorities classify the species into three or four subspecies: B. m. musculus, the northern blue whale consisting of the North Atlantic and North Pacific populations, B. m. intermedia, the southern blue whale of the Southern Ocean, B. m. brevicauda, the pygmy blue whale found in the Indian Ocean and South Pacific, and the more problematic B. m. indica, the great Indian rorqual, which is also found in the Indian Ocean and, although described earlier, may be the same subspecies as B. m. brevicauda.

The poet's ashes were buried beside, or beneath, a boulder to the immediate west of where his childhood home ( destroyed by fire in 1957 ) stood ; some were also scattered in a stand of blue oaks near the boulder.

The constellation was also used on the dark blue, shield-like patch worn by personnel of the U. S. Army's Americal Division, which was organized in the Southern Hemisphere, on the island of New Caledonia, and also the blue diamond of the U. S. 1st Marine Division, which fought on the Southern Hemisphere islands of Guadalcanal and New Britain.

The blue jersey is also worn during Tuesday home games with the standard home cap and helmet.

The 2004 series Superman: Birthright also explained that Superman's eyes are an inhumanly vivid shade of blue, which Clark's glasses diffuse to make his eyes appear more human.

The blue star also is used on other entries like an imaging facility and storage facility.

The team's helmets are also a unique silver with a tint of blue known as " Metallic Silver Blue " ( PMS 8240 C ) and have a blue / white / blue vertical stripe placed upon the center of the crown.

The Cowboys also include a unique, if subtle, feature on the back of the helmet: a blue strip of Dymo tape with the player's name embossed, placed on the white portion of the stripe at the back of the helmet.

Their socks also had two horizontal white stripes overlapping the blue.

Humble also tried marketing under Enco in Ohio, but Standard Oil Company of Ohio ( Sohio ) protested that the Enco name and logo ( a white oval with blue border and red lettering ) too closely resembled that of Esso.

A similar scenario can also be constructed if blue is reserved for water.