Red Giants

Some articles on red giants, red, giant:

Red Giant - Characteristics
... Red giants are stars that have exhausted the supply of hydrogen in their cores and switched to thermonuclear fusion of hydrogen in a shell surrounding the core ... Despite the lower energy density of their envelope, red giants are many times more luminous than the Sun because of their large size ... Red-giant-branch stars have luminosities about a hundred to several hundred times the Sun (L☉), spectral types of K or M, temperatures of 3,000–4,000K, and diameters about 20–100 times the Sun (R☉) ...
Incarnadine - In Science - Astronomy
... Mars is called the Red Planet because of the reddish color imparted to its surface by the abundant iron oxide present there ... objects that are moving away from the observer exhibit a Doppler red shift ... Jupiter's surface displays a Great Red Spot caused by an oval-shaped mega storm south of the planet's equator ...
Stellar Evolution - Maturity of A Star - Mid-sized Stars
... Stars of roughly 0.5–10 solar masses become red giants, which are large non-main sequence stars of stellar classification K or M ... Red giants lie along the right edge of the Hertzsprung-Russell diagram due to their red color and large luminosity ... Red giants all have inert cores with hydrogen-burning shells concentric layers atop the core that are still fusing hydrogen into helium ...
Rare Earth Hypothesis - Rare Earth's Requirements For Complex Life - Orbiting At The Right Distance From The Right Type of Star
... This does not rule out life on a moon of a gas giant ... above, have short lives, becoming red giants in as little as 1 Ga (1 billion years) ... Small red dwarf stars, on the other hand, have habitable zones with a small radius ...

Famous quotes containing the words giants and/or red:

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    Omar Bradley (1893–1981)

    Hm, the beacon of the press. In the hell to which all journalists must descend when they die, Mr. Wiggam, we shall sit at red hot desks with quills of fire in our hand and spend eternity on eternity writing about the salubrious weather of that region. Let us serve our apprenticeship here thoroughly and intelligently.
    Ben Hecht (1893–1964)