Mega earth
Mega Earth is a slang term for an extremely large extrasolar terrestrial planet . It should be noted that this is only based on the mass, but does not make any statements about the surface properties or habitability of the planet. The new category was proposed to distinguish it from the smaller and lower-mass super-earths by identifying the approximately 2.3 times Earth-sized planet Kepler-10c as a rock planet due to its approximately 17 times the Earth's mass and the resulting mean density of 7.1 ± 1, 0 g / cm³ (for comparison: earth 5.515 g / cm³). Recent work casts doubt on the high mass of this exoplanet, but other candidates for this class of planets have also been suggested.
Examples (candidates)
Individual evidence
- ^ Astronomers Find a New Type of Planet: The "Mega-Earth". harvard.edu, June 2, 2014, accessed June 3, 2014 .
- ↑ Stefan Deiters: Astronomers discover “Mega Earth”. astronews.com, June 3, 2014, accessed June 3, 2014 .
- ↑ Xavier Dumusque et al .: The Kepler-10 planetary system revisited by HARPS-N: A hot rocky world and a solid Neptune-mass planet . May 30, 2014, arxiv : 1405.7881 (English).
- ↑ V. Rajpaul: pinning down the mass of Kepler-10c: the importance of sampling and model comparison . In: Monthly Notices of the Royal Astronomical Society . 471, No. 1, July 2017, pp. L25-L130. arxiv : 1707.06192 . bibcode : 2017MNRAS.471L.125R . doi : 10.1093 / mnrasl / slx116 .