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It has a surface temperature of 5757 K, nearly the same as the Sun, which has a surface temperature of 5778 K. [15] The star's age is estimated to be about 6 billion years old, about 1.5 billion years older than the Sun, which is estimated to have existed for 4.6 billion years. Kepler-452b has been in Kepler-452's habitable zone for most of its ...
Surface gravity (log ... [18] It may even have a surface temperature similar to that of Earth ... If Kepler-452b is a rocky planet, ...
If it has similar albedo and atmospheric composition, the average surface temperature will be around 29 °C. [48] According to Jon Jenkins of NASA's Ames Research Center, it is not known whether Kepler-452b is a terrestrial planet, an ocean world or a mini-Neptune. [45]
If Kepler-22b moves in a highly elliptical orbit, its surface temperature variance will be very high. ... Kepler-452b; Kepler-62f; Kepler-1229b; HD 85512 b; Kepler-69c;
K2-18 is an M dwarf of the spectral class M3V [4] in the constellation Leo, [5] 38.025 ± 0.079 parsecs (124.02 ± 0.26 ly) away from the Sun. [1] The star is colder and smaller than the Sun, having a temperature of 3,457 K (3,184 °C; 5,763 °F) and a radius 45% of the Sun's, [6] and is not visible to the naked eye. [7]
Kepler-442b is a super-Earth, an exoplanet with a mass and radius bigger than Earth's but smaller than the ice giants Uranus and Neptune. It has an equilibrium temperature of 233 K (−40 °C; −40 °F). [3] It has a radius of 1.34 R 🜨 and the mass estimated to be 2.36 M E. [8]
The planet orbits a red dwarf star named Kepler-438.The star has a mass of 0.54 M ☉ and a radius of 0.52 R ☉, both lower than those of the Sun by almost half. It has a surface temperature of 3748 K and is estimated to be about 4.4 billion years old, [3] only 200 million years younger than the Sun [7] and the Sun has a surface temperature of 5778 K. [8]
The lower average density and temperature of these objects give them lower index values. Only Titan (a moon of Saturn) is known to hold on to a significant atmosphere despite an overall lower size and density. While Io (a moon of Jupiter) has a low average temperature, surface temperature on the moon varies wildly due to geologic activity. [10]