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Theia (planet)

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and Theia, those pieces either forming one body that became the Moon or forming two moons that eventually merged to form the Moon. Such accounts assumed that a head-on impact would have destroyed both planets, creating a short-lived second
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Young, E. D.; Kohl, I. E.; Warren, P. H.; Rubie, D. C.; Jacobson, S. A.; Morbidelli, A. (28 January 2016). "Oxygen isotopic evidence for vigorous mixing during the Moon-forming giant impact".
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In contrast, evidence published in January 2016 suggests that the impact was indeed a head-on collision and that Theia's remains are on Earth and the Moon.
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configuration presented by the Earth–Sun system, where it would tend to remain. If this were the case it might have grown to a size comparable to
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Meier, M. M. M.; Reufer, A.; Wieler, R. (2014). "On the origin and composition of Theia: Constraints from new models of the Giant Impact".
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were found to be very similar in composition to Earth's crust, and so were likely removed from Earth in some violent event.
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Herwartz, D.; Pack, A.; Friedrichs, B.; Bischoff, A. (2014). "Identification of the giant impactor Theia in lunar rocks".
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Initially, the hypothesis supposed that Theia had struck Earth with a glancing blow and ejected many pieces of both the
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Animation of collision between Earth (blue) and Theia (black), forming the Moon (red and gray). Bodies are not to scale.
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detected deep in Earth's mantle may be fragments of Theia. In 2023, computer simulations reinforced that hypothesis.
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Reufer, Andreas; Meier, Matthias M. M.; Benz, Willy; Wieler, Rainer (2012). "A hit-and-run giant impact scenario".
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From the beginning of modern astronomy, there have been at least four hypotheses for the origin of the Moon:
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Jutzi, M.; Asphaug, E. (2011). "Forming the lunar farside highlands by accretion of a companion moon".
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in the lower mantle may be remnants of Theia. Theia is hypothesized to have been about the size of
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around 4.5 billion years ago, with some of the resulting ejected debris coalescing to form the
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An artist's depiction of the hypothetical impact of a planet like Theia and the Earth
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Yuan, Qian; Li, Mingming; Desch, Steven J.; Ko, Byeongkwan (2021).
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could have put it onto a collision course with the early Earth.
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Planet hypothesized to have impacted Earth and created the Moon
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away from that relationship by the gravitational influence of
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The Moon was captured by Earth's gravity (as most of the
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Meier, M. M. M.; Reufer, A.; Wieler, R. (2014-11-01).
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The Earth and Moon formed at the same time when the
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(1 November 2023). 929:52nd Lunar and Planetary Science Conference 704: 702: 3313: 2515: 2511: 2336: 2322: 2314: 1057: 1043: 1035: 128:whom she later married, and the mother of 880: 749: 600: 458: 271:The Theia-impact scenario described above 3855:Interstellar and circumstellar molecules 553: 551: 4132:Hypothetical bodies of the Solar System 4067: 4051:) may be read as "within" or "part of". 3079:Planetary orbit-crossing minor planets 324: 252:A single body split into Earth and Moon 231:between the orbits of Venus and Mars. 7: 1020:from the original on 2 November 2023 797:Wolpert, Stuart (January 28, 2016). 422:from the original on 1 November 2023 332:Wolpert, Stuart (January 12, 2017). 275:The lunar rock samples retrieved by 408:Chang, Kenneth (1 November 2023). 287:large low-shear-velocity provinces 90:large low-shear-velocity provinces 25: 2275:Lilith (hypothetical second moon) 4094: 4082: 4070: 3942: 3930: 3918: 2297: 2296: 2238:Moon landing conspiracy theories 1161: 384:Sample, Ian (November 1, 2023). 187:, nearly along the orbit of the 43: 3818:Gravitationally rounded objects 1660:Selenographic coordinate system 2187:Artificial objects on the Moon 949:Gorvett, Zaria (12 May 2022). 259:' smaller moons were captured) 102:provided much of Earth's water 1: 1278:Total penumbral lunar eclipse 309:Phaeton (hypothetical planet) 96:, and may have formed in the 2253:Moon is made of green cheese 1547:Permanently shadowed craters 899:10.1016/j.icarus.2014.08.003 619:10.1016/j.icarus.2012.07.021 565:. 2009-04-09. Archived from 477:10.1016/j.icarus.2014.08.003 3913:Outline of the Solar System 3676:Interplanetary medium/space 709:Nace, Trevor (2016-01-30). 157:Gravitational perturbations 4163: 4127:Hypothetical impact events 3629:Extraterrestrial materials 2180:Craters named after people 1653:Transient lunar phenomenon 1301:Solar eclipses on the Moon 998:10.1038/s41586-023-06589-1 241: 104:, though this is debated. 3949:Earth sciences portal 3908: 3671:Interplanetary dust cloud 2509: 2351: 2291: 1159: 1072: 518:10.1007/978-3-319-31836-3 504:. Springer. p. 178. 3962:Local Interstellar Cloud 2674:other near-Earth objects 285:It is possible that the 207:). Theia was eventually 76:which, according to the 3925:Solar System portal 3651:Giant-impact hypothesis 3258:Trans-Neptunian objects 2201:Moon in science fiction 1706:Giant-impact hypothesis 1554:South Pole–Aitken basin 838:10.1126/science.1251117 768:10.1126/science.aad0525 181:giant impact hypothesis 78:giant-impact hypothesis 3813:Possible dwarf planets 3656:Gravitational collapse 3594:Circumstellar envelope 2393: 2222:futuristic exploration 1745:Late Heavy Bombardment 176: 35: 4022:Laniakea Supercluster 3639:Sample-return mission 2392: 2282:Splitting of the Moon 2194:Memorials on the Moon 1798:Lunar sample displays 1480:Peak of eternal light 696:, August 2014, 44–49. 498:Murdin, Paul (2016). 174: 33: 4137:Hypothetical planets 3937:Astronomy portal 3838:Solar System objects 3584:Circumplanetary disk 183:, Theia orbited the 80:, collided with the 4036:Observable universe 3833:Solar System models 3763:Protoplanetary disk 3686:Interstellar medium 3646:Frost/Ice/Snow line 1782:Lunar laser ranging 990:2023Natur.623...95Y 891:2014Icar..242..316M 830:2014Sci...344.1146H 824:(6188): 1146–1150. 760:2016Sci...351..493Y 662:10.1038/nature10289 654:2011Natur.476...69J 611:2012Icar..221..296R 510:2016rlat.book.....M 469:2014Icar..242..316M 264:protoplanetary disk 4016:Virgo Supercluster 3997:Milky Way subgroup 3828:Natural satellites 3711:Nebular hypothesis 3691:Interstellar space 3681:Interstellar cloud 3589:Circumstellar disc 3179:Near-Earth objects 3063:names and meanings 2394: 1931:Lunisolar calendar 1600:Lunar basalt 70017 1347:Tidal acceleration 1202:Perigee and apogee 1092:Internal structure 415:The New York Times 244:Origin of the Moon 177: 98:outer Solar System 74:early Solar System 36: 4058: 4057: 3903: 3902: 3899: 3898: 3876:Lagrangian points 3848:by discovery date 3446:Human spaceflight 3417:historical models 3310: 3309: 2929:S/2015 (136472) 1 2311: 2310: 2261:Natural satellite 1720:Lunar magma ocean 1496:Volcanic features 744:(6272): 493–496. 193:Lagrangian points 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2643: 2638: 2633: 2628: 2623: 2618: 2613: 2608: 2598: 2597: 2596: 2595: 2594: 2589: 2579: 2578: 2577: 2572: 2557: 2556: 2555: 2550: 2545: 2540: 2529: 2527: 2510: 2507: 2506: 2504: 2503: 2496: 2489: 2482: 2475: 2468: 2461: 2454: 2447: 2442: 2437: 2432: 2427: 2420: 2415: 2410: 2405: 2400: 2352: 2349: 2348: 2343: 2341: 2340: 2333: 2326: 2318: 2309: 2308: 2306: 2305: 2292: 2289: 2288: 2286: 2285: 2278: 2271: 2264: 2257: 2248: 2241: 2234: 2233: 2232: 2225: 2218: 2211: 2197: 2190: 2183: 2176: 2175: 2174: 2167: 2153: 2146: 2139: 2132: 2124: 2122: 2118: 2117: 2115: 2114: 2107: 2100: 2092: 2090: 2086: 2085: 2083: 2082: 2075: 2068: 2061: 2054: 2047: 2040: 2033: 2026: 2025: 2024: 2010: 2002: 2000: 1991: 1990: 1988: 1987: 1984:Lunar distance 1980: 1973: 1966: 1959: 1958: 1957: 1956: 1955: 1934: 1927: 1924:Lunar calendar 1919: 1917: 1908: 1907: 1905: 1904: 1897: 1890: 1889: 1888: 1874: 1867: 1860: 1859: 1858: 1851: 1848:Apollo program 1836: 1834: 1828: 1827: 1825: 1824: 1817: 1816: 1815: 1808: 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698: 683: 632: 595:(1): 296–299. 579: 547: 533: 526: 490: 433: 397: 376: 351: 323: 321: 318: 317: 316: 311: 306: 301: 294: 291: 273: 272: 269: 260: 253: 242:Main article: 239: 236: 204: 200: 168: 165: 147: 143: 137: 134: 109: 106: 26: 24: 18:Theia (Planet) 14: 13: 10: 9: 6: 4: 3: 2: 4159: 4148: 4145: 4143: 4140: 4138: 4135: 4133: 4130: 4128: 4125: 4123: 4122:Lunar science 4120: 4118: 4115: 4114: 4112: 4102: 4092: 4090: 4080: 4078: 4073: 4068: 4064: 4053: 4044: 4037: 4030: 4023: 4017: 4011: 4005: 3998: 3991: 3984: 3977: 3970: 3963: 3956: 3950: 3940: 3938: 3928: 3926: 3916: 3914: 3911: 3910: 3907: 3892: 3891:Tidal locking 3889: 3887: 3884: 3882: 3879: 3877: 3874: 3872: 3871:Double planet 3869: 3868: 3866: 3862: 3856: 3853: 3849: 3846: 3844: 3841: 3840: 3839: 3836: 3834: 3831: 3829: 3826: 3824: 3823:Minor planets 3821: 3819: 3816: 3814: 3811: 3809: 3806: 3805: 3803: 3799: 3793: 3790: 3788: 3785: 3781: 3778: 3777: 3776: 3773: 3771: 3768: 3764: 3761: 3757: 3756:Merging stars 3754: 3753: 3752: 3749: 3747: 3744: 3742: 3739: 3737: 3734: 3732: 3729: 3728: 3727: 3724: 3722: 3719: 3717: 3714: 3712: 3709: 3707: 3704: 3702: 3699: 3697: 3694: 3692: 3689: 3687: 3684: 3682: 3679: 3677: 3674: 3672: 3669: 3667: 3664: 3662: 3659: 3657: 3654: 3652: 3649: 3647: 3644: 3640: 3637: 3635: 3632: 3631: 3630: 3627: 3625: 3622: 3620: 3617: 3615: 3612: 3610: 3607: 3605: 3602: 3600: 3597: 3595: 3592: 3590: 3587: 3585: 3582: 3578: 3575: 3574: 3573: 3570: 3568: 3565: 3563: 3560: 3559: 3557: 3555: 3549: 3543: 3540: 3538: 3535: 3533: 3530: 3528: 3525: 3523: 3520: 3518: 3515: 3513: 3510: 3506: 3503: 3502: 3501: 3498: 3496: 3493: 3491: 3488: 3484: 3481: 3480: 3479: 3476: 3474: 3471: 3469: 3466: 3462: 3459: 3457: 3454: 3452: 3449: 3448: 3447: 3444: 3440: 3437: 3435: 3432: 3431: 3430: 3427: 3423: 3420: 3418: 3415: 3413: 3410: 3409: 3408: 3405: 3403: 3400: 3399: 3397: 3394: 3389: 3385: 3379: 3376: 3374: 3371: 3369: 3366: 3364: 3361: 3359: 3358:Subsatellites 3356: 3354: 3351: 3349: 3346: 3344: 3341: 3339: 3336: 3334: 3331: 3329: 3326: 3325: 3323: 3321: 3318:Hypothetical 3315: 3312: 3303: 3300: 3296: 3293: 3291: 3288: 3286: 3283: 3281: 3278: 3274: 3271: 3269: 3266: 3265: 3264: 3261: 3260: 3259: 3256: 3252: 3249: 3247: 3244: 3243: 3242: 3239: 3235: 3232: 3230: 3227: 3225: 3222: 3220: 3217: 3215: 3212: 3210: 3207: 3205: 3202: 3200: 3197: 3195: 3192: 3191: 3190: 3187: 3185: 3184:Asteroid belt 3182: 3180: 3177: 3173: 3170: 3168: 3165: 3163: 3160: 3156: 3153: 3151: 3148: 3147: 3146: 3143: 3141: 3138: 3136: 3133: 3131: 3128: 3127: 3126: 3123: 3119: 3116: 3114: 3111: 3109: 3106: 3104: 3101: 3099: 3096: 3094: 3091: 3089: 3086: 3084: 3081: 3080: 3078: 3076: 3073: 3069: 3066: 3064: 3061: 3060: 3059: 3058:Minor planets 3056: 3054: 3051: 3049: 3046: 3044: 3041: 3040: 3038: 3036: 3026: 3020: 3017: 3015: 3012: 3010: 3007: 3005: 3002: 3000: 2997: 2995: 2992: 2989: 2985: 2982: 2980: 2977: 2974: 2971: 2970: 2968: 2966: 2962: 2954: 2951: 2950: 2949: 2946: 2942: 2939: 2938: 2937: 2934: 2930: 2927: 2926: 2925: 2922: 2918: 2915: 2914: 2913: 2910: 2906: 2903: 2901: 2898: 2897: 2896: 2893: 2889: 2886: 2884: 2881: 2879: 2876: 2874: 2871: 2869: 2866: 2865: 2864: 2861: 2857: 2854: 2853: 2852: 2849: 2845: 2842: 2840: 2837: 2835: 2832: 2830: 2827: 2826: 2825: 2822: 2818: 2815: 2813: 2810: 2808: 2805: 2803: 2800: 2798: 2795: 2793: 2790: 2789: 2788: 2785: 2781: 2778: 2776: 2773: 2771: 2768: 2766: 2763: 2761: 2758: 2756: 2753: 2751: 2748: 2746: 2743: 2741: 2738: 2736: 2733: 2732: 2731: 2728: 2724: 2721: 2719: 2716: 2714: 2711: 2709: 2706: 2704: 2701: 2700: 2699: 2696: 2692: 2689: 2687: 2684: 2683: 2682: 2679: 2675: 2672: 2670: 2667: 2666: 2664: 2663: 2661: 2659: 2655: 2647: 2644: 2642: 2639: 2637: 2634: 2632: 2629: 2627: 2624: 2622: 2619: 2617: 2614: 2612: 2609: 2607: 2604: 2603: 2602: 2599: 2593: 2590: 2588: 2585: 2584: 2583: 2580: 2576: 2573: 2571: 2568: 2567: 2566: 2563: 2562: 2561: 2558: 2554: 2551: 2549: 2546: 2544: 2541: 2539: 2536: 2535: 2534: 2531: 2530: 2528: 2526: 2521: 2517: 2514: 2513: 2508: 2502: 2501: 2497: 2495: 2494: 2490: 2488: 2487: 2483: 2481: 2480: 2476: 2474: 2473: 2469: 2467: 2466: 2462: 2460: 2459: 2455: 2453: 2452: 2448: 2446: 2443: 2441: 2438: 2436: 2433: 2431: 2428: 2426: 2425: 2421: 2419: 2416: 2414: 2411: 2409: 2406: 2404: 2401: 2399: 2396: 2395: 2350: 2346: 2339: 2334: 2332: 2327: 2325: 2320: 2319: 2316: 2303: 2294: 2293: 2290: 2283: 2279: 2276: 2272: 2269: 2268:Double planet 2265: 2262: 2258: 2254: 2249: 2246: 2242: 2239: 2235: 2230: 2226: 2223: 2219: 2216: 2212: 2209: 2205: 2204: 2202: 2198: 2195: 2191: 2188: 2184: 2181: 2177: 2172: 2168: 2165: 2161: 2160: 2158: 2154: 2151: 2150:Moon illusion 2147: 2144: 2140: 2137: 2133: 2130: 2129:Lunar deities 2126: 2125: 2123: 2119: 2112: 2108: 2105: 2101: 2098: 2094: 2093: 2091: 2087: 2080: 2076: 2073: 2069: 2066: 2062: 2059: 2055: 2052: 2048: 2045: 2041: 2038: 2034: 2031: 2027: 2022: 2018: 2017: 2015: 2011: 2008: 2004: 2003: 2001: 1996: 1992: 1985: 1981: 1978: 1977:Lunar station 1974: 1971: 1967: 1964: 1960: 1953: 1949: 1948: 1946: 1942: 1941: 1939: 1935: 1932: 1928: 1925: 1921: 1920: 1918: 1916: 1911:Time-telling 1909: 1902: 1898: 1895: 1891: 1886: 1882: 1881: 1879: 1875: 1872: 1868: 1865: 1861: 1856: 1852: 1849: 1845: 1844: 1842: 1838: 1837: 1835: 1833: 1829: 1822: 1818: 1813: 1809: 1806: 1802: 1801: 1799: 1795: 1790: 1786: 1783: 1779: 1778: 1774: 1769: 1765: 1762: 1758: 1755: 1751: 1746: 1742: 1741: 1739: 1735: 1734: 1732: 1728: 1721: 1717: 1714: 1710: 1709: 1707: 1703: 1702: 1700: 1696: 1693: 1689: 1686: 1682: 1679: 1675: 1674: 1672: 1668: 1661: 1657: 1654: 1650: 1647: 1643: 1638: 1634: 1631: 1627: 1626: 1624: 1620: 1617: 1613: 1608: 1604: 1601: 1597: 1596: 1594: 1590: 1587: 1583: 1580: 1576: 1571: 1567: 1566: 1564: 1560: 1555: 1551: 1548: 1544: 1541: 1537: 1534: 1530: 1529: 1527: 1523: 1518: 1514: 1511: 1507: 1504: 1500: 1499: 1497: 1493: 1490: 1486: 1481: 1477: 1476: 1474: 1470: 1465: 1461: 1460: 1458: 1454: 1447: 1443: 1442: 1440: 1436: 1433: 1429: 1428: 1424: 1419: 1415: 1412: 1408: 1407: 1403: 1400: 1396: 1393: 1389: 1386: 1382: 1381: 1379: 1377: 1371: 1364: 1363:Lunar station 1360: 1355: 1351: 1348: 1344: 1341: 1340:Tidal locking 1337: 1334: 1330: 1329: 1327: 1323: 1318: 1314: 1309: 1308:Eclipse cycle 1305: 1302: 1298: 1295: 1294:Solar eclipse 1291: 1286: 1282: 1279: 1275: 1274: 1272: 1271:Lunar eclipse 1268: 1267: 1265: 1261: 1258: 1254: 1251: 1247: 1246: 1244: 1240: 1235: 1231: 1226: 1222: 1221: 1219: 1215: 1212: 1208: 1203: 1199: 1198: 1196: 1192: 1191: 1189: 1185: 1182: 1178: 1177: 1175: 1173: 1169: 1164: 1151: 1147: 1146: 1144: 1140: 1137: 1133: 1130: 1126: 1121: 1117: 1116: 1114: 1113:Gravity field 1110: 1107: 1103: 1100: 1096: 1093: 1089: 1088: 1086: 1080: 1076: 1071: 1067: 1060: 1055: 1053: 1048: 1046: 1041: 1040: 1037: 1019: 1015: 1011: 1007: 1003: 999: 995: 991: 987: 983: 979: 978: 973: 966: 963: 958: 957: 952: 945: 942: 930: 923: 916: 913: 908: 904: 900: 896: 892: 888: 883: 878: 874: 870: 863: 860: 855: 851: 847: 843: 839: 835: 831: 827: 823: 819: 812: 809: 804: 803:UCLA newsroom 800: 793: 790: 785: 781: 777: 773: 769: 765: 761: 757: 752: 747: 743: 739: 732: 729: 718: 717: 712: 705: 703: 699: 695: 694: 687: 684: 679: 675: 671: 667: 663: 659: 655: 651: 647: 643: 636: 633: 628: 624: 620: 616: 612: 608: 603: 598: 594: 590: 583: 580: 569:on 2013-11-13 568: 564: 560: 554: 552: 548: 543: 537: 534: 529: 527:9783319318363 523: 519: 515: 511: 507: 503: 502: 494: 491: 486: 482: 478: 474: 470: 466: 461: 456: 452: 448: 444: 437: 434: 421: 417: 416: 411: 404: 402: 398: 393: 392: 387: 380: 377: 366:on 2017-06-19 365: 361: 355: 352: 339: 335: 328: 325: 319: 315: 312: 310: 307: 305: 302: 300: 297: 296: 292: 290: 288: 283: 281: 278: 270: 268: 265: 261: 258: 257:outer planets 254: 251: 250: 249: 245: 237: 235: 232: 230: 229:asteroid belt 225: 220: 218: 214: 210: 198: 194: 190: 186: 182: 173: 166: 164: 162: 158: 154: 150: 135: 133: 131: 127: 123: 119: 115: 107: 105: 103: 99: 95: 91: 87: 83: 79: 75: 71: 67: 61: 40: 32: 19: 4117:Solar System 4047:Each arrow ( 3969:Local Bubble 3955:Solar System 3953: 3746:Planetesimal 3701:Kuiper cliff 3429:Space probes 3402:Colonization 3362: 3241:Kirkwood gap 3162:Saturn Moons 3075:Planetesimal 2533:Terrestrials 2498: 2491: 2484: 2477: 2470: 2463: 2456: 2449: 2422: 2345:Solar System 2136:Lunar effect 1952:Nodal period 1878:Colonization 1712: 1692:Lunar theory 1385:Selenography 1225:Nodal period 1022:. Retrieved 981: 975: 965: 954: 944: 932:. Retrieved 928: 915: 872: 868: 862: 821: 817: 811: 802: 792: 741: 737: 731: 720:. Retrieved 714: 691: 686: 645: 641: 635: 592: 588: 582: 571:. Retrieved 567:the original 536: 500: 493: 450: 446: 436: 424:. Retrieved 413: 391:The Guardian 389: 379: 368:. Retrieved 364:the original 354: 342:. Retrieved 337: 327: 284: 274: 247: 233: 221: 196: 178: 139: 111: 66:hypothesized 38: 37: 4101:Outer space 4089:Spaceflight 4010:Local Sheet 4004:Local Group 3787:Rubble pile 3775:Roche limit 3770:Ring system 3721:Outer space 3696:Kuiper belt 3666:Hill sphere 3661:Hills cloud 3609:Debris disk 3604:Cosmic dust 3388:Exploration 3343:Planet Nine 3328:Fifth giant 3302:Hills cloud 3263:Kuiper belt 3234:exceptional 3150:Trojan camp 2245:Moon Treaty 2229:Hollow Moon 2171:Moon rabbit 2143:Earth phase 1945:Lunar month 1832:Exploration 1776:Experiments 1678:Observation 1540:Ray systems 1405:Hemispheres 1373:Surface and 1354:Tidal range 1333:Tidal force 1136:Sodium tail 1120:Hill sphere 875:: 316–328. 453:: 316–328. 224:proto-Earth 189:proto-Earth 82:early Earth 4111:Categories 4029:Local Hole 3976:Gould Belt 3716:Oort cloud 3552:Formation, 3542:Deep space 3378:Vulcanoids 3295:Oort cloud 3219:first 1000 3155:Greek camp 3053:Meteoroids 3048:Damocloids 2994:Charikloan 2215:Apollo era 2157:Pareidolia 1915:navigation 1637:Sputtering 1517:Lava tubes 1439:South pole 1432:North pole 1392:Terminator 1234:Precession 1150:Earthshine 1106:Atmosphere 1099:Topography 1084:properties 1024:2 November 956:BBC Future 751:1603.04536 722:2016-01-30 573:2013-11-13 426:2 November 370:2013-11-13 320:References 280:astronauts 238:Hypotheses 199:, either L 3990:Milky Way 3983:Orion Arm 3751:Formation 3736:Migration 3731:Disrupted 3599:Coatlicue 3567:Accretion 3554:evolution 3500:Asteroids 3412:astronomy 3407:Discovery 3268:Cubewanos 3189:Asteroids 3019:Quaoarian 3009:Neptunian 2999:Chironean 2984:Saturnian 2760:Enceladus 1963:Fortnight 1855:Explorers 1812:Apollo 17 1805:Apollo 11 1768:Volcanism 1738:Timescale 1685:Libration 1473:Mountains 1411:Near side 1317:Supermoon 1257:Full moon 1211:Libration 1143:Moonlight 1014:264869152 907:119226112 882:1410.3819 693:Astronomy 627:118421530 602:1207.5224 485:0019-1035 460:1410.3819 209:perturbed 167:Collision 4043:Universe 3881:Moonlets 3461:programs 3434:timeline 3422:timeline 3353:Planet X 3348:Planet V 3285:Sednoids 3273:Plutinos 3246:Centaurs 3224:families 2953:Dysnomia 2941:Xiangliu 2936:Gonggong 2924:Makemake 2883:Kerberos 2770:Hyperion 2708:Callisto 2703:Ganymede 2636:Gonggong 2631:Makemake 2486:Gonggong 2479:Makemake 2302:Category 2097:Moonrise 2030:Crescent 1970:Sennight 1885:Moonbase 1841:Missions 1510:Calderas 1418:Far side 1376:features 1264:Eclipses 1250:New moon 1195:Distance 1082:Physical 1018:Archived 1006:37914947 934:27 March 854:30903580 846:24904162 776:26823426 670:21814278 420:Archived 344:23 March 314:Synestia 293:See also 267:accreted 126:Hyperion 68:ancient 4063:Portals 3864:Related 3843:by size 3532:Neptune 3517:Jupiter 3468:Mercury 3393:outline 3338:Phaeton 3333:Nemesis 3320:objects 3172:Neptune 3145:Jupiter 3125:Trojans 3118:Neptune 3103:Jupiter 3083:Mercury 3014:Haumean 3004:Uranian 2986: ( 2900:Hiʻiaka 2834:Proteus 2824:Neptune 2812:Miranda 2802:Umbriel 2792:Titania 2780:all 146 2745:Iapetus 2698:Jupiter 2592:Neptune 2570:Jupiter 2538:Mercury 2520:Planets 2445:Neptune 2430:Jupiter 2403:Mercury 2121:Related 2111:Moonset 1894:Tourism 1871:Landing 1731:Geology 1670:Science 1526:Craters 1489:Valleys 1075:Outline 986:Bibcode 887:Bibcode 826:Bibcode 818:Science 805:. UCLA. 784:6548599 756:Bibcode 738:Science 650:Bibcode 607:Bibcode 506:Bibcode 465:Bibcode 213:Jupiter 72:in the 64:) is a 4038:  4031:  4024:  3999:  3992:  3985:  3978:  3971:  3964:  3957:  3886:Syzygy 3808:Comets 3741:System 3726:Planet 3619:EXCEDE 3527:Uranus 3522:Saturn 3512:Comets 3505:mining 3483:mining 3373:Vulcan 3214:active 3209:Hygiea 3204:Pallas 3167:Uranus 3113:Uranus 3108:Saturn 3043:Comets 3035:bodies 3033:System 2979:Jovian 2917:Weywot 2912:Quaoar 2905:Namaka 2895:Haumea 2868:Charon 2844:all 16 2839:Nereid 2829:Triton 2817:all 28 2797:Oberon 2787:Uranus 2775:Phoebe 2755:Tethys 2730:Saturn 2723:all 95 2718:Europa 2691:Deimos 2686:Phobos 2665:Earth 2626:Quaoar 2621:Haumea 2601:Dwarfs 2587:Uranus 2575:Saturn 2560:Giants 2525:dwarfs 2472:Quaoar 2465:Haumea 2440:Uranus 2435:Saturn 2079:Tetrad 1995:Phases 1864:Probes 1699:Origin 1646:Quakes 1579:Rilles 1570:swirls 1285:Tetrad 1243:Syzygy 1012:  1004:  977:Nature 905:  869:Icarus 852:  844:  782:  774:  716:Forbes 676:  668:  642:Nature 625:  589:Icarus 524:  483:  447:Icarus 340:. UCLA 277:Apollo 130:Selene 122:Titans 70:planet 4147:Space 4142:Water 4077:Stars 3801:Lists 3537:Pluto 3495:Ceres 3473:Venus 3368:Tyche 3363:Theia 3199:Vesta 3194:Ceres 3135:Earth 3130:Venus 3093:Earth 3088:Venus 3068:moons 3031:Solar 3029:Small 2988:Rhean 2973:Earth 2965:Rings 2878:Hydra 2863:Pluto 2856:Vanth 2851:Orcus 2807:Ariel 2765:Mimas 2750:Dione 2735:Titan 2658:Moons 2646:Sedna 2616:Pluto 2611:Orcus 2606:Ceres 2548:Earth 2543:Venus 2500:Sedna 2458:Pluto 2451:Orcus 2424:Ceres 2413:Earth 2408:Venus 2058:Black 2044:Blood 2021:Names 1999:names 1938:Month 1789:ALSEP 1761:KREEP 1713:Theia 1616:Water 1593:Rocks 1503:Domes 1457:Maria 1426:Poles 1218:Nodes 1172:Orbit 1010:S2CID 925:(PDF) 903:S2CID 877:arXiv 850:S2CID 780:S2CID 746:arXiv 678:84558 674:S2CID 623:S2CID 597:arXiv 455:arXiv 217:Venus 161:Venus 136:Orbit 118:Theia 39:Theia 3490:Mars 3478:Moon 3456:list 3439:list 3140:Mars 3098:Mars 2948:Eris 2888:Styx 2740:Rhea 2681:Mars 2669:Moon 2641:Eris 2553:Mars 2493:Eris 2418:Mars 2208:list 2065:Dark 2051:Blue 2014:Full 1913:and 1563:Soil 1533:List 1464:List 1446:Face 1399:Limb 1326:Tide 1066:Moon 1026:2023 1002:PMID 936:2021 842:PMID 772:PMID 666:PMID 563:NASA 522:ISBN 481:ISSN 428:2023 346:2022 203:or L 197:i.e. 153:Mars 146:or L 108:Name 100:and 94:Mars 86:Moon 3229:PHA 2873:Nix 2582:Ice 2565:Gas 2398:Sun 2072:Wet 2007:New 1997:and 994:doi 982:623 895:doi 873:242 834:doi 822:344 764:doi 742:351 658:doi 646:476 615:doi 593:221 514:doi 473:doi 451:242 185:Sun 159:by 112:In 4113:: 2990:?) 2713:Io 1016:. 1008:. 1000:. 992:. 980:. 974:. 953:. 927:. 901:. 893:. 885:. 871:. 848:. 840:. 832:. 820:. 801:. 778:. 770:. 762:. 754:. 740:. 713:. 701:^ 672:. 664:. 656:. 644:. 621:. 613:. 605:. 591:. 561:. 550:^ 520:. 512:. 479:. 471:. 463:. 449:. 445:. 418:. 412:. 400:^ 388:. 336:. 215:, 116:, 54:iː 4065:: 4049:→ 4040:→ 4033:→ 4026:→ 4019:→ 4013:→ 4007:→ 4001:→ 3994:→ 3987:→ 3980:→ 3973:→ 3966:→ 3959:→ 3395:) 3391:( 2975:? 2522:, 2337:e 2330:t 2323:v 2255:" 2251:" 1058:e 1051:t 1044:v 1028:. 996:: 988:: 959:. 938:. 909:. 897:: 889:: 879:: 856:. 836:: 828:: 786:. 766:: 758:: 748:: 725:. 680:. 660:: 652:: 629:. 617:: 609:: 599:: 576:. 544:. 530:. 516:: 508:: 487:. 475:: 467:: 457:: 430:. 394:. 373:. 348:. 205:5 201:4 195:( 148:5 144:4 142:L 60:/ 57:ə 51:θ 48:ˈ 45:/ 41:( 20:)

Index

Theia (Planet)

/ˈθə/
hypothesized
planet
early Solar System
giant-impact hypothesis
early Earth
Moon
large low-shear-velocity provinces
Mars
outer Solar System
provided much of Earth's water
Greek mythology
Theia
Titans
Hyperion
Selene
L4 or L5
Mars
Gravitational perturbations
Venus

giant impact hypothesis
Sun
proto-Earth
Lagrangian points
perturbed
Jupiter
Venus

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