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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.
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 ...
Scorpio: Sun, Moon, and Rising Signs. Sun: Don't let this constantly evolving sign fool you! Scorpios suns are the mysterious and secretive water sign of the zodiac, but under that calm exterior ...
You may enjoy reading daily, weekly, or monthly predictions based on your star sign. You likely identify with at least some of the personality traits attributed to your sun, moon, and rising signs ...
A fresh reading on inflation Friday keeps the Federal Reserve on track to cut interest rates in September.. The annual change in the Fed’s preferred inflation gauge — the so-called core ...
The separation between stars in a binary may range from less than one astronomical unit (AU, the average Earth–Sun distance) to several hundred. In latter instances, the gravitational effects will be negligible on a planet orbiting an otherwise suitable star and habitability potential will not be disrupted unless the orbit is highly eccentric.
The planet orbits the faint orange dwarf star [a] KOI-5715, which has a spectral type of K3V. [8] It is located approximately 2,964 light-years from Earth in the constellation of Cygnus. [ 9 ] The effective temperature of the star is roughly 5123 K, [ 1 ] relatively cooler than the Sun's temperature of 5780 K. [ 10 ] KOI-5715 is also smaller ...