A Red Giant. Even the largest red dwarf only has about 10% of the Sun’s luminosity. Many of the well-known bright stars are red giants, because they are luminous and moderately common. Well known examples. They belong to luminosity class I and are of spectral type M or K. ALMA's images show that the star is a giant… Red Supergiants A star of 15 solar masses exhausts its hydrogen in about one-thousandth the lifetime of our sun.

An example of this is Antares, which, aside from being the heart of the scorpion in the constellation of Scorpio, was the subject of a song Uhura sang in the rec-room ( Beyond Antares, TOS “ The Conscience of the King ”, “ The Changeling ”). It proceeds through the red giant phase, but when it reaches the triple-alpha process of nuclear fusion, it continues to burn for a time and expands to an even larger volume.The much brighter, but still reddened star is called a red supergiant. For our own award-winning short films, we create new software to fill our needs.
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In fact, a red dwarf emits 1/10,000th the energy. Characteristics By the time a red giant has become a white dwarf, fusion has ceased, and the star doesn't have enough energy to counteract the force of gravity. Most stars of this type are between 200 and 800 times the radius of our Sun . VY Canis Majoris (VY CMa) is the biggest known red giant star Since red giant stars come in a range of diameters and masses, different types of red giants are placed on different locations on … A red giant is an enormous, highly luminous star, typically tens to hundreds the times the diameter of our own sun, that represents the late stages of the stellar evolution of a main sequence star.Typically for stars between 0.5 and 6 solar masses. The very largest stars in our galaxy, all red supergiants, are about 1,500 times the size of our home star. The Sun is definitely not a red giant; if it were to swell to the size of a red giant (like Antares, for example), our Earth would end up inside the Sun. Aldebaran (α Tauri); Arcturus (α Bootis); Gacrux (γ Crucis) The greater the mass of the star, the more quickly it will enter the red giant phase of its evolution. A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. A Chalmers-led team of astronomers has for the first time observed details on the surface of an aging star with the same mass as the sun. A good example of a red supergiant is the star Betelgeuse, in the constellation Orion.
A yellow star.

A red giant is born when a star like our Sun reaches the end of its life and runs out of hydrogen fuel in its core. The K0 red-giant branch star Arcturus is 36 light-years away.. Red-giant branch. A red supergiant is a star that is similar in nature but bigger and more massive than a red giant. Red Giant. Red supergiants typically span several hundred times the diameter of the Sun and have masses of more than 10 times that of the Sun.