Super Earth K2-18 b is a super Earth exoplanet
DISCOVERED 2015 K2-18 b
PLANET TYPE Super Earth
K2-18 b is a super Earth exoplanet that orbits an M-type star. Its mass is 8.92 Earths. It takes 32.9 days to complete one orbit of its star. And is 0.1429 AU from its star. Its discovery was announced in 2015.
Super Earth K2-18 b is a super Earth exoplanet
A) ORBITAL RADIUS 0.1429AU
B) ORBITAL PERIOD 32.9 days
C) ORBITAL ECCENTRICITY 0.2
Planet Comparison K2-18 b Earth MASS8.92 Earths RADIUS2.37 x Earth
Star Comparison K2-18 Our Sun MASS0.36 x Our Sun RADIUS0.41 x Our Sun
How long to Travel Here from Earth ?
TRAVEL SPEED 60 Miles per hour
TRAVEL TIME 1 Billion years
AUTO BULLET TRAIN JET VOYAGER LIGHT SPEED
Detection Method: Transit
If a planet passes directly between a star and an observer’s line of sight. It blocks out a tiny portion of the star’s light. Thus reducing its apparent brightness. Sensitive instruments can detect this periodic dip in brightness. From the period and depth of the transits. The orbit and size of the planetary companions can be calculated. Smaller planets will produce a smaller effect, and vice-versa. A terrestrial planet in an Earth-like orbit, for example, would produce a minute dip in stellar brightness that would last just a few hours.
Observed By
K2
K2-18 b is a super Earth exoplanet
In 2019 the presence of water vapour in K2-18b’s atmosphere was discovered, drawing attention to this system. Its atmosphere may have an unexpectedly small concentration of methane, although observation uncertainties preclude a definitive determination. K2-18b has been studied as a potential habitable word that, temperature aside, resembles more a gas planet like Uranus or Neptune than Earth.
If a planet passes directly between a star and an observer’s line of sight. It blocks out a tiny portion of the star’s light.
Super Earth K2-18 b is a super Earth exoplanet
Source: En Wikipedia org wiki K2-18b
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See also:
Earth to exoplanet hunting for planets
G) Thus reducing its apparent brightness. A terrestrial planet in an Earth-like orbit, for example, would produce a minute dip in stellar brightness that would last just a few hours. Its atmosphere may have an unexpectedly small concentration of methane, although observation uncertainties preclude a definitive determination. K2-18b has been studied as a potential habitable word that, temperature aside, resembles more a gas planet like Uranus or Neptune than Earth.
H) Thus reducing its apparent brightness. A terrestrial planet in an Earth-like orbit, for example, would produce a minute dip in stellar brightness that would last just a few hours. Its atmosphere may have an unexpectedly small concentration of methane, although observation uncertainties preclude a definitive determination. K2-18b has been studied as a potential habitable word that, temperature aside, resembles more a gas planet like Uranus or Neptune than Earth.
I) Thus reducing its apparent brightness. A terrestrial planet in an Earth-like orbit, for example, would produce a minute dip in stellar brightness that would last just a few hours. Its atmosphere may have an unexpectedly small concentration of methane, although observation uncertainties preclude a definitive determination. K2-18b has been studied as a potential habitable word that, temperature aside, resembles more a gas planet like Uranus or Neptune than Earth.
I) Thus reducing its apparent brightness. A terrestrial planet in an Earth-like orbit, for example, would produce a minute dip in stellar brightness that would last just a few hours. Its atmosphere may have an unexpectedly small concentration of methane, although observation uncertainties preclude a definitive determination. K2-18b has been studied as a potential habitable word that, temperature aside, resembles more a gas planet like Uranus or Neptune than Earth.
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Revised September 15, 2023