The newly confirmed planet, Kepler-22b, is the smallest yet found to orbit in the middle of the habitable zone of a star similar to our sun. The planet is about 2.4 times the radius of Earth. Scientists don't yet know if Kepler-22b has a predominantly rocky, gaseous or liquid compositi...
According to Kepler's third law,the orbital period T of a planet is related to the radius R of itsorbit by T2 R3.A planet's orbit is larger than Earth's by a factor if4.97.What is the planet's orbital period?(Earth's orbital period is 1 yr.) 相关知识点: 试题来源: 解析 T ...
Sidereal period, the time required for a celestial body within the solar system to complete one revolution with respect to the fixed stars—i.e., as observed from some fixed point outside the system. The sidereal period of a planet can be calculated if i
By the end of its mission, Kepler had discovered 2,662 extrasolar planets, about two-thirds of all planets then known. One of these,Kepler-22b, has a radius 2.4 times that of Earth and was the first planet found within thehabitable zoneof a star like the Sun. Kepler-20e and Kepler-20...
The orbital migration has been more important for sub-Neptunes than for super-Earths, suggesting a partial ex situ formation of the former and an origin of the radius valley caused in part by distinct formation pathways. However, the model comparisons also show that ...
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According to Kepler's third law,the orbital period T of a planet is related to the radius R of its 相关知识点: 试题来源: 解析 即T ^ 2=t ^ 2 * R ^ 3 / r ^ 3 (R / r=4.97,故R ^ 3 / r ^ 3 =122.763473) 两边开方:T=t * (R ^ 3 / r ^ 3) ^ 0.5=11.07986791 (years...
We are curious about frequency of comet-like tail formation among short-period Kepler exoplanet candidates. We concentrate on a sample of 20 close-in candidates with a period similar to KIC012557548b from the Kepler mission. We first improved the preliminary orbital periods and obtained the ...