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 first coined in 2014, when Kepler-10c was revealed to be a Neptune-mass planet with a density considerably greater than that of Earth.
List of Mega-Earth exoplanets
|Planet||Star system||Location||Distance||Constellation|| Mass
|Right Ascension||Declination||Period|| Size |
|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|
- 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/.