Mega-Earth
Size comparison of Kepler-10c, a Mega-Earth, with Earth and Neptune
A mega-Earth is a massive terrestrial exoplanet that is at least ten times the mass of Earth. Mega-Earths are substantially more massive than super-Earths (terrestrial and ocean planets with masses around 5–10 Earths). The term "mega-Earth" was coined in 2014, when Kepler-10c was revealed to be a Neptune-mass planet with a density considerably greater than that of Earth.[1][2]
List of Mega-Earth exoplanets
| Planet | Star system | Location | Distance | Constellation | Mass (MEarth) |
Size (REarth) |
Density (g/cm3) |
Surface gravity | Orbit | Notes | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right Ascension | Declination | Period | Size (AU) | ||||||||||
| Kepler-10c | Kepler-10 | 19h 02m 43s | +50° 14′ 29″ | 584 ly (179 pc) | Draco | 17.2 | 2.34 | 7.100 | 45.3 days | 0.24 | |||
| K2-3d | K2-3 | 11h 29m 20.39s | −01° 27′ 17.2″ | 137 ly (42 pc) | Leo | 7.50 | 1.61 | 11.7 | 44.6 days | 0.2 | |||
| BD+20594b | BD+20 594 | 03h 34m 36.23s | +20° 35′ 57.2″ | 496.08 ly (152.10 pc) | Aries | 16.3 | 2.23 | 7.890 | 41.69 days | 0.241 | |||
References
- ↑ Sasselov, Dimitar (2 June 2014) Exoplanets: From Exhilarating to Exasperating, 22:59, Kepler-10c: The "Mega-Earth", YouTube
- ↑ "Astronomers Find a New Type of Planet: The "Mega-Earth"2014-14". www.cfa.harvard.edu/.
See also
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