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K-type main-sequence stars, also known as orange dwarfs, may be candidates for supporting extraterrestrial life.These stars are known as "Goldilocks stars" as they emit enough radiation in the non-UV ray spectrum [1] to provide a temperature that allows liquid water to exist on the surface of a planet; they also remain stable in the main sequence longer than the Sun by burning their hydrogen ...
K-type main-sequence stars are about three to four times as abundant as G-type main-sequence stars, making planet searches easier. [17] K-type stars emit less total ultraviolet and other ionizing radiation than G-type stars like the Sun (which can damage DNA and thus hamper the emergence of nucleic acid based life). In fact, many peak in the red.
Announced in 1996 by Geoffrey Marcy and R. Paul Butler, 70 Virginis was one of the first stars confirmed to have planets orbiting it. [3] When first announced, 70 Virginis b was considered to be within its star's habitable zone (preferably in the "Goldilocks zone"), but it was later confirmed that the planet has an eccentric orbit, closer to ...
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For example, according to Kopparapu's habitable zone estimate, although the Solar System has a circumstellar habitable zone centered at 1.34 AU from the Sun, [4] a star with 0.25 times the luminosity of the Sun would have a habitable zone centered at , or 0.5, the distance from the star, corresponding to a distance of 0.67 AU. Various ...
Yellow dwarf stars correspond to the G-class stars of the main sequence, with a mass between 0.9 and 1.1 M☉, [2] and surface temperatures between 5000 and 6000 K. [3] Since the Sun itself is a yellow dwarf, of type G2V, [11] these types of stars are also known as solar analogs.
Remake of the original game. [4] Advance Wars: 2001 Game Boy Advance: Advance Wars 1+2: Re-Boot Camp: 2023 Nintendo Switch: Remakes of the original games. [5] Advance Wars 2: Black Hole Rising: 2003 Age of Empires: 1997 Windows, Mac OS Age of Empires: Definitive Edition: 2018 Windows: Updated visuals, sound, and gameplay. [6] Age of Empires II ...
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