2024年10月25日 · Kepler-20 e is a terrestrial exoplanet that orbits a G-type star. Its mass is 0.76 Earths, it takes 6.1 days to complete one orbit of its star, and is 0.0637 AU from its star. Its discovery was announced in 2011.

Kepler-20e is the first planet smaller than the Earth discovered to orbit a star other than the Sun. A year on Kepler-20e only lasts 6 days, as it is much closer to its host star than the Earth is to the Sun.

2011年12月20日 · The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in the so-called habitable zone where liquid water could exist on a planet's surface, but they are the smallest exoplanets ever confirmed around a star like our sun.

2025年2月12日 · The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in the so-called habitable zone where liquid water could exist on a planet’s surface, but they are the smallest exoplanets ever confirmed around a star like our sun.

2011年12月20日 · The Kepler-20 system is unusual in that the sizes of the planets alternate, with the closest in being large, followed by a small planet, and then continuing on with the planets switching back and forth in size.

2011年12月20日 · This artist's animation flies through the Kepler-20 star system, where NASA's Kepler mission discovered the first Earth-size planets around a star beyond our own. The system is jam-packed with five planets, all circling within a distance roughly equivalent to Mercury's orbit in our solar system.

2011年12月21日 · The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in the habitable zone where liquid water could exist on a planet’s surface, but they are the smallest exoplanets...

Kepler-20 is a star about 934 light-years (286 parsecs) from Earth in the constellation Lyra with a system of at least five, and possibly six, known planets. [5] The apparent magnitude of this star is 12.51, so it cannot be seen with the unaided eye.

2013年2月21日 · The two planets, dubbed Kepler-20e and 20f, are the smallest planets found to date. They have diameters of 6,900 miles and 8,200 miles – equivalent to 0.87 times Earth (slightly smaller than Venus) and 1.03 times Earth.

2011年12月20日 · Kepler-20e is slightly smaller than Venus, measuring 0.87 times the radius of Earth. Kepler-20f is slightly larger than Earth, measuring 1.03 times its radius. Both planets reside in a...