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Mega-Earth

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31: 751: 132:. At the time of its discovery in 2016, it had the highest chance of being rocky for a planet its size, with a posterior probability that it is dense enough to be terrestrial at about 0.43. For comparison, at the time the corresponding probability for Kepler-10c was calculated as 0.1, and as 0.002 for Kepler-131b. 380:
Espinoza, Néstor; Brahm, Rafael; Jordán, Andrés; Jenkins, James S.; Rojas, Felipe; Jofré, Paula; Mädler, Thomas; Rabus, Markus; Chanamé, Julio; Pantoja, Blake; Soto, Maritza G.; Morzinski, Katie M.; Males, Jared R.; Ward-Duong, Kimberly; Close, Laird M. (2016).
1744: 1739: 1734: 1729: 152:, so large that it could belong to a sub-category of mega-Earths known as supermassive terrestrial planets (SMTP). It likely has an Earth-like composition of rock and iron without any volatiles. A similar mega-Earth, 93:), giving it a high density that implied a mainly rocky composition. However, several follow-up radial velocity studies produced different results for Kepler-10c's mass, all much below the original 17  66:
was revealed to be a Neptune-mass planet with a density considerably greater than that of Earth, though it has since been determined to be a typical volatile-rich planet weighing just under half that mass.
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Kepler-10c was the first exoplanet to be classified as a mega-Earth. At the time of its discovery, it was believed to have a mass around 17 times that of Earth (
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estimate. In 2017, a more careful analysis using data from multiple different telescopes and spectrographs found that Kepler-10c is more likely around 7.4 
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Basic Mineralogical Models for Silicate- and Carbon-Rich Mega-Earths Considering Compositional and Geophysical Constraints
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are a pair of planets orbiting the same star, both thought to be mega-Earths with masses of about 87.4 
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Kepler-145b and K2-66b: A Kepler- and a K2-Mega-Earth with Different Compositional Characteristics
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is one of the most massive planets classified as mega-Earths, with a mass of 37.1 
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Kepler-277 b: A Supermassive Terrestrial Exoplanet in the Kepler-277 Planetary System
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BD+20594B: A Mega-Earth Detected in the C4 field of the Kepler K2 mission
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is the most massive mega-Earth ever known with a mass of about 330 
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which is most likely composed largely of crystalline carbon but with a
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The mass of Kepler-10c revisited: upping the radial velocities game
540: 55: 274:"Astronomers Find a New Type of Planet: The "Mega-Earth"2014-14" 649: 645: 622:
Astronomers Find "Mega-Earth," Most Massive Rocky Planet Yet
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Monthly Notices of the Royal Astronomical Society: Letters
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Exoplanetary Circumstellar Environments and Disk Explorer
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Bailes, M.; Bates, S. D.; et al. (25 August 2011).
118:, is a much more likely mega-Earth, with about 16  58:. Mega-Earths would be substantially more massive than 624:, BY MARCUS WOO FOR NATIONAL GEOGRAPHIC, JUNE 5, 2014 1864: 1653: 1612: 1514: 1426: 1333: 1266: 1039: 919: 845: 771: 758: 713: 27:
Terrestrial planet with ten times the mass of Earth
306:Rajpaul, V.; Buchhave, L. A.; Aigrain, S. (2017). 1564:Habitability of K-type main-sequence star systems 1559:Habitability of F-type main-sequence star systems 628:Impossibly heavy planet is the first 'mega-Earth' 1183:List of interstellar and circumstellar molecules 296:, Leonardo dos Santos, 7 August 2017, Astrobites 661: 496:"Astronomers discover planet made of diamond" 8: 634:Kepler space telescope spies a ‘Mega-Earth’ 630:, New Scientist, 2 June 2014, By Jacob Aron 601:49th Lunar and Planetary Science Conference 474:51st Lunar and Planetary Science Conference 443:49th Lunar and Planetary Science Conference 360:48th Lunar and Planetary Science Conference 768: 668: 654: 646: 726:Exoplanet orbital and physical parameters 539: 416: 398: 333: 323: 84:) and a radius around 2.3 times Earth's ( 1594:List of potentially habitable exoplanets 289: 287: 29: 265: 54:that is at least ten times the mass of 1902:Geodynamics of terrestrial exoplanets 7: 1584:Habitability of yellow dwarf systems 1574:Habitability of neutron star systems 107:, making it a typical volatile-rich 1927:Sudarsky's gas giant classification 1554:Habitability of binary star systems 1912:Nexus for Exoplanet System Science 1569:Habitability of natural satellites 25: 1579:Habitability of red dwarf systems 494:Hirschler, Ben (25 August 2011). 1676:Stars with proto-planetary discs 1640:NASA Star and Exoplanet Database 1630:Extrasolar Planets Encyclopaedia 1118:Extraterrestrial sample curation 749: 642:, By Miriam Kramer June 02, 2014 163:and a radius of about 2.49  156:, has a mass of about 21.3  1589:Habitable zone for complex life 1027:Ultra-short period planet (USP) 731:Methods of detecting exoplanets 194:, and radii of about 2.92  1770:Discovered exoplanets by year 636:, Washington Post, June 2 2014 221:and a radius less than 4  1: 1897:Extrasolar planets in fiction 1544:Extraterrestrial liquid water 1917:Planets in globular clusters 1534:Circumstellar habitable zone 1877:Exoplanet naming convention 987:Planet/Brown dwarf boundary 590:Futó, P; Gucsik, A (2018). 1999: 1113:Extraterrestrial materials 747: 418:10.3847/0004-637X/830/1/43 145:and a radius of 2.65  50:for a massive terrestrial 1940:Discoveries of exoplanets 1935: 1143:Interplanetary dust cloud 681: 387:The Astrophysical Journal 1645:Open Exoplanet Catalogue 1620:Nearby Habitable Systems 1506:Transit-timing variation 228:. PSR J1719−1438 b is a 114:K2-56b, also designated 38:, with Earth and Neptune 1922:Small planet radius gap 1625:Exoplanet Data Explorer 1549:Galactic habitable zone 1123:Giant-impact hypothesis 558:10.1126/science.1208890 1882:Exoplanet phase curves 1720:Terrestrial candidates 1671:Multiplanetary systems 1635:NASA Exoplanet Archive 1318:Mean-motion resonances 1128:Gravitational collapse 1078:Circumstellar envelope 111:and not a mega-Earth. 39: 1757:Potentially habitable 1662:Exoplanetary systems 1604:Superhabitable planet 1363:F/Yellow-white dwarfs 1248:Sample-return mission 1148:Interplanetary medium 335:10.1093/mnrasl/slx116 33: 1892:Extragalactic planet 1872:Carl Sagan Institute 1153:Interplanetary space 1068:Circumplanetary disk 741:Planet-hosting stars 18:Massive solid planet 1973:Terrestrial planets 1233:Protoplanetary disk 1213:Planetary migration 1168:Interstellar medium 947:Circumtriple planet 942:Circumbinary planet 550:2011Sci...333.1717B 534:(6050): 1717–1720. 409:2016ApJ...830...43E 34:Size comparison of 1198:Nebular hypothesis 1173:Interstellar space 1158:Interstellar cloud 1138:Internal structure 1073:Circumstellar disc 40: 1953: 1952: 1529:Astrooceanography 1163:Interstellar dust 1035: 1034: 911:Ultra-hot Neptune 906:Ultra-hot Jupiter 855:Eccentric Jupiter 705:Planetary science 236:far greater than 16:(Redirected from 1990: 1907:Neptunian desert 1293:Tidally detached 1228:Planet formation 1218:Planetary system 1108:Exozodiacal dust 1098:Disrupted planet 1022:Ultra-cool dwarf 952:Disrupted planet 937:Chthonian planet 769: 753: 736:Planetary system 670: 663: 656: 647: 611: 609: 607: 598: 578: 577: 543: 519: 513: 512: 510: 508: 491: 485: 484: 482: 480: 471: 463:Futó, P (2020). 460: 454: 453: 451: 449: 440: 432:Futó, P (2018). 429: 423: 422: 420: 402: 377: 371: 370: 368: 366: 357: 349:Futó, P (2017). 346: 340: 339: 337: 327: 303: 297: 291: 282: 281: 276:. Archived from 270: 212:PSR J1719−1438 b 208:, respectively. 21: 1998: 1997: 1993: 1992: 1991: 1989: 1988: 1987: 1978:Types of planet 1958: 1957: 1954: 1949: 1945:Search projects 1931: 1860: 1649: 1608: 1510: 1482:Radial velocity 1422: 1378:K/Orange dwarfs 1368:G/Yellow dwarfs 1329: 1323:Titius–Bode law 1262: 1193:Molecular cloud 1093:Detached object 1044: 1042: 1031: 1017:Toroidal planet 1007:Sub-brown dwarf 915: 841: 813:(Super-Mercury) 786:Coreless planet 762: 760: 754: 745: 709: 677: 674: 618: 616:Further reading 605: 603: 596: 589: 586: 581: 521: 520: 516: 506: 504: 493: 492: 488: 478: 476: 469: 462: 461: 457: 447: 445: 438: 431: 430: 426: 379: 378: 374: 364: 362: 355: 348: 347: 343: 305: 304: 300: 292: 285: 280:on 2 June 2014. 272: 271: 267: 263: 246: 227: 224: 220: 217: 207: 204: 200: 197: 193: 190: 186: 183: 169: 166: 162: 159: 151: 148: 144: 141: 131: 128: 124: 121: 106: 103: 99: 96: 91: 88: 82: 79: 73: 28: 23: 22: 15: 12: 11: 5: 1996: 1994: 1986: 1985: 1980: 1975: 1970: 1960: 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1297: 1296: 1295: 1285: 1284: 1283: 1272: 1270: 1264: 1263: 1261: 1260: 1258:Star formation 1255: 1253:Scattered disc 1250: 1245: 1240: 1235: 1230: 1225: 1220: 1215: 1210: 1205: 1200: 1195: 1190: 1185: 1180: 1175: 1170: 1165: 1160: 1155: 1150: 1145: 1140: 1135: 1130: 1125: 1120: 1115: 1110: 1105: 1103:Excretion disk 1100: 1095: 1090: 1085: 1080: 1075: 1070: 1065: 1060: 1058:Accretion disk 1055: 1049: 1047: 1037: 1036: 1033: 1032: 1030: 1029: 1024: 1019: 1014: 1009: 1004: 999: 994: 989: 984: 979: 974: 969: 967:Eyeball planet 964: 959: 954: 949: 944: 939: 934: 929: 923: 921: 917: 916: 914: 913: 908: 903: 898: 893: 888: 883: 878: 873: 868: 863: 857: 851: 849: 843: 842: 840: 839: 834: 829: 824: 819: 814: 808: 803: 798: 793: 788: 783: 777: 775: 766: 756: 755: 748: 746: 744: 743: 738: 733: 728: 723: 717: 715: 711: 710: 708: 707: 702: 701: 700: 699: 698: 682: 679: 678: 675: 673: 672: 665: 658: 650: 644: 643: 637: 631: 625: 617: 614: 613: 612: 585: 582: 580: 579: 514: 486: 455: 424: 372: 341: 298: 283: 264: 262: 259: 258: 257: 252: 245: 242: 225: 222: 218: 215: 205: 202: 201:and 3.36  198: 195: 191: 188: 187:and 64.2  184: 181: 167: 164: 160: 157: 149: 146: 142: 139: 129: 126: 122: 119: 104: 101: 97: 94: 89: 86: 80: 77: 72: 69: 46:is a proposed 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 1995: 1984: 1983:Giant planets 1981: 1979: 1976: 1974: 1971: 1969: 1966: 1965: 1963: 1956: 1946: 1943: 1941: 1938: 1937: 1934: 1928: 1925: 1923: 1920: 1918: 1915: 1913: 1910: 1908: 1905: 1903: 1900: 1898: 1895: 1893: 1890: 1888: 1885: 1883: 1880: 1878: 1875: 1873: 1870: 1869: 1867: 1863: 1855: 1852: 1850: 1847: 1845: 1842: 1840: 1837: 1835: 1832: 1830: 1827: 1825: 1822: 1820: 1817: 1815: 1812: 1810: 1807: 1805: 1802: 1800: 1797: 1795: 1792: 1790: 1787: 1785: 1782: 1780: 1777: 1775: 1772: 1771: 1769: 1768: 1763: 1760: 1758: 1755: 1753: 1750: 1746: 1743: 1741: 1738: 1736: 1733: 1731: 1728: 1727: 1726: 1723: 1721: 1718: 1716: 1713: 1711: 1708: 1706: 1703: 1701: 1698: 1696: 1693: 1691: 1688: 1687: 1686: 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1265: 1259: 1256: 1254: 1251: 1249: 1246: 1244: 1241: 1239: 1236: 1234: 1231: 1229: 1226: 1224: 1221: 1219: 1216: 1214: 1211: 1209: 1206: 1204: 1201: 1199: 1196: 1194: 1191: 1189: 1188:Merging stars 1186: 1184: 1181: 1179: 1176: 1174: 1171: 1169: 1166: 1164: 1161: 1159: 1156: 1154: 1151: 1149: 1146: 1144: 1141: 1139: 1136: 1134: 1131: 1129: 1126: 1124: 1121: 1119: 1116: 1114: 1111: 1109: 1106: 1104: 1101: 1099: 1096: 1094: 1091: 1089: 1086: 1084: 1081: 1079: 1076: 1074: 1071: 1069: 1066: 1064: 1063:Asteroid belt 1061: 1059: 1056: 1054: 1051: 1050: 1048: 1046: 1038: 1028: 1025: 1023: 1020: 1018: 1015: 1013: 1010: 1008: 1005: 1003: 1002:Pulsar planet 1000: 998: 995: 993: 990: 988: 985: 983: 980: 978: 975: 973: 970: 968: 965: 963: 960: 958: 957:Double planet 955: 953: 950: 948: 945: 943: 940: 938: 935: 933: 930: 928: 925: 924: 922: 918: 912: 909: 907: 904: 902: 899: 897: 896:Super-Neptune 894: 892: 891:Super-Jupiter 889: 887: 884: 882: 879: 877: 874: 872: 869: 867: 866:Helium planet 864: 861: 858: 856: 853: 852: 850: 848: 844: 838: 835: 833: 830: 828: 825: 823: 820: 818: 815: 812: 809: 807: 804: 802: 801:Hycean planet 799: 797: 794: 792: 791:Desert planet 789: 787: 784: 782: 781:Carbon planet 779: 778: 776: 774: 770: 767: 765: 757: 752: 742: 739: 737: 734: 732: 729: 727: 724: 722: 719: 718: 716: 712: 706: 703: 697: 694: 693: 692: 689: 688: 687: 684: 683: 680: 671: 666: 664: 659: 657: 652: 651: 648: 641: 638: 635: 632: 629: 626: 623: 620: 619: 615: 602: 595: 594: 588: 587: 583: 575: 571: 567: 563: 559: 555: 551: 547: 542: 537: 533: 529: 525: 518: 515: 503: 502: 497: 490: 487: 475: 468: 467: 459: 456: 444: 437: 436: 428: 425: 419: 414: 410: 406: 401: 396: 392: 388: 384: 376: 373: 361: 354: 353: 345: 342: 336: 331: 326: 321: 318:: L125–L130. 317: 313: 309: 302: 299: 295: 290: 288: 284: 279: 275: 269: 266: 260: 256: 255:Super-Neptune 253: 251: 248: 247: 243: 241: 239: 235: 231: 230:pulsar planet 213: 209: 179: 175: 171: 155: 137: 133: 125:and 2.2  117: 112: 110: 92: 83: 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Retrieved 351: 344: 315: 311: 301: 278:the original 268: 210: 172: 134: 113: 109:mini-Neptune 74: 60:super-Earths 43: 41: 1968:Mega-Earths 1774:before 2000 1690:Discoveries 1465:Polarimetry 1353:Binary star 1243:Rubble pile 1238:Ring system 1208:Outer space 1178:Kuiper belt 1133:Hills cloud 1088:Debris disk 1083:Cosmic dust 1012:Sub-Neptune 997:Protoplanet 932:Brown dwarf 920:Other types 876:Hot Neptune 871:Hot Jupiter 862:(Gas dwarf) 837:Super-Earth 822:Ocean world 817:Lava planet 811:Iron planet 773:Terrestrial 714:Main topics 606:6 September 584:Works cited 479:6 September 448:6 September 365:6 September 250:Sub-Neptune 178:Kepler-277c 174:Kepler-277b 136:Kepler-145b 1962:Categories 1685:Exoplanets 1666:Host stars 1613:Catalogues 1436:Astrometry 1398:Subdwarf B 1335:Host stars 1308:Retrograde 1203:Oort cloud 1041:Formation 977:Mesoplanet 901:Super-puff 827:Mega-Earth 806:Ice planet 691:Definition 676:Exoplanets 400:1601.07608 325:1707.06192 261:References 64:Kepler-10c 44:mega-Earth 36:Kepler-10c 1779:2000–2009 1745:1501–2000 1740:1001–1500 1428:Detection 1393:Red giant 1053:Accretion 1045:evolution 886:Ice giant 881:Gas giant 832:Sub-Earth 721:Exoplanet 574:206535504 541:1108.5201 507:25 August 393:(1): 43. 116:BD+20594b 52:exoplanet 48:neologism 1735:501–1000 1715:Heaviest 1695:Extremes 1403:Subgiant 1276:Exocomet 566:21868629 244:See also 71:Examples 1710:Largest 1705:Nearest 1408:T Tauri 1304:Orbits 1288:Exomoon 1268:Systems 982:Planemo 847:Gaseous 546:Bibcode 528:Science 501:Reuters 405:Bibcode 238:diamond 234:density 1725:Kepler 1700:Firsts 1599:Tholin 1470:Timing 1388:Pulsar 1313:Trojan 927:Blanet 686:Planet 572:  564:  154:K2-66b 1865:Other 1730:1–500 1655:Lists 764:types 759:Sizes 597:(PDF) 570:S2CID 536:arXiv 470:(PDF) 439:(PDF) 395:arXiv 356:(PDF) 320:arXiv 56:Earth 1854:2024 1849:2023 1844:2022 1839:2021 1834:2020 1829:2019 1824:2018 1819:2017 1814:2016 1809:2015 1804:2014 1799:2013 1794:2012 1789:2011 1784:2010 1499:list 1487:list 1475:list 1458:list 1446:list 1043:and 761:and 608:2020 562:PMID 509:2011 481:2020 450:2020 367:2020 176:and 696:IAU 554:doi 532:333 413:doi 391:830 330:doi 316:471 1964:: 1752:K2 599:. 568:. 560:. 552:. 544:. 530:. 526:. 498:. 472:. 441:. 411:. 403:. 389:. 385:. 358:. 328:. 314:. 310:. 286:^ 240:. 226:🜨 206:🜨 199:🜨 168:🜨 150:🜨 130:🜨 90:🜨 42:A 1348:B 1343:A 669:e 662:t 655:v 610:. 576:. 556:: 548:: 538:: 511:. 483:. 452:. 421:. 415:: 407:: 397:: 369:. 338:. 332:: 322:: 223:R 219:E 216:M 203:R 196:R 192:E 189:M 185:E 182:M 165:R 161:E 158:M 147:R 143:E 140:M 127:R 123:E 120:M 105:E 102:M 98:E 95:M 87:R 81:E 78:M 20:)

Index

Massive solid planet

Kepler-10c
neologism
exoplanet
Earth
super-Earths
Kepler-10c
ME
R🜨
mini-Neptune
BD+20594b
Kepler-145b
K2-66b
Kepler-277b
Kepler-277c
PSR J1719−1438 b
pulsar planet
density
diamond
Sub-Neptune
Super-Neptune
"Astronomers Find a New Type of Planet: The "Mega-Earth"2014-14"
the original


The mass of Kepler-10c revisited: upping the radial velocities game
"Pinning down the mass of Kepler-10c: The importance of sampling and model comparison"
arXiv
1707.06192

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