2265:
2289:
2241:
2277:
2253:
1025:
276:
that were subsequently refuted). After applying the corrections, there is no evidence for a planet orbiting the star. If it had been real, the
Jupiter-like planet would have been particularly interesting, orbiting a star nearing the end of its life and seemingly about to be engulfed by it,
811:
Klement, R.; Setiawan, J.; Thomas
Henning; Hans-Walter Rix; Boyke Rochau; Jens Rodmann; Tim Schulze-Hartung; MPIA Heidelberg; ESTEC (2011). "The visitor from an ancient galaxy: A planetary companion around an old, metal-poor red horizontal branch star".
229:, which is currently located in galactic halo and has extragalactic origin, was found to have a significantly higher metallicity than the similar star HD 134439. This was believed to resulted from an engulfment of orbiting planets by HD 134440.
102:, caused the event. This was the first extragalactic planet candidate announced. This, however, is not a repeatable observation, as it was a one-time chance alignment. This predicted planet lies 4 billion light years away.
564:
70:, approximately 27,710 light-years from the Sun, while the Milky Way is about 87,400 light-years in diameter. This means that even galactic planets located further than that distance have not been detected.
58:. Due to the immense distances to such worlds, they would be very hard to detect directly. However, indirect evidence suggests that such planets exist. Nonetheless, the most distant known planets are
2018:
2013:
2008:
2003:
572:
1998:
2160:
2025:
462:
372:
2052:
1837:
1832:
1993:
1456:
1760:
627:
463:"More Than a Trillion Planets Could Exist Beyond Our Galaxy - A new study gives the first evidence that exoplanets exist beyond the Milky Way"
654:
Di
Stefano, Rosanne; Berndtsson, Julia; Urquhart, Ryan; Soria, Roberto; Kashyap, Vinay L.; Carmichael, Theron W.; Imara, Nia (2021-10-25).
1731:
1314:
526:
2047:
1591:
999:
1767:
2030:
1867:
1596:
909:
587:
547:
853:
Jones, M. I.; Jenkins, J. S. (2014). "No evidence of the planet orbiting the extremely metal-poor extragalactic star HIP 13044".
1714:
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2112:
2107:
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2097:
2092:
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2057:
1748:
720:
126:, weighing just around 6.34 times the mass of Jupiter. This suspected planet is the first announced in the Andromeda Galaxy.
17:
268:
However, subsequent analysis of the data revealed problems with the potential planetary detection: for example an erroneous
1857:
1847:
1581:
1893:
1827:
941:
498:
472:
1260:
2185:
2035:
1842:
1719:
605:
Di
Stefano, R.; et al. (18 September 2020). "M51-ULS-1b: The First Candidate for a Planet in an External Galaxy".
265:, a leftover remnant of a small galaxy that collided with and was absorbed by the Milky Way over 6 billion years ago.
2218:
1852:
2319:
1913:
1903:
1391:
250:(ESO) orbiting a star of extragalactic origin, even though the star currently has been absorbed by our own galaxy.
110:
A team of scientists has used gravitational microlensing to come up with a tentative detection of an extragalactic
1988:
1939:
1862:
1701:
1004:
277:
potentially providing an observational model for the fate of our own planetary system in the distant future (cf.
1944:
2170:
1817:
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1641:
1636:
1621:
1616:
247:
2155:
1501:
1807:
1586:
1461:
2150:
1949:
721:"Evidences of extragalactic origin and planet engulfment in the metal-poor twin pair HD 134439/HD 134440"
467:
67:
1608:
2231:
1983:
1978:
1968:
1726:
1386:
816:. IAU Symposium. Vol. 276. Proceedings of the International Astronomical Union. pp. 121–125.
159:
2213:
1963:
1631:
1416:
1300:
2309:
1973:
1918:
1779:
1671:
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1326:
969:
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320:
2314:
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934:
278:
262:
226:
1908:
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1401:
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269:
171:
151:
1376:
122:'s nearest large galactic neighbor. The lensing pattern fits a star with a smaller companion,
1877:
1646:
1521:
1421:
1255:
1446:
876:
2190:
2145:
1755:
1426:
1341:
1037:
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827:
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677:
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296:
194:
8:
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95:
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412:
87:
1802:
1436:
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1179:
1128:
978:
760:
705:
693:
655:
444:
373:"NASA telescope may have just helped find the first planet spotted outside Milky Way"
272:
correction had been applied (the same error had also led to claims of planets around
202:
892:
814:
The
Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution
2245:
2180:
1928:
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835:
750:
685:
430:
210:
175:
115:
55:
884:
656:"A possible planet candidate in an external galaxy detected through X-ray transit"
321:"Extroplanet: Astronomers may have just found the first planet outside our galaxy"
1626:
1466:
1366:
1290:
1280:
1059:
565:"First extragalactic exoplanet may have been found by gravitational microlensing"
551:
1531:
1526:
1331:
1240:
689:
435:
400:
135:
91:
839:
349:
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632:
155:
810:
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1676:
1573:
1496:
1265:
1245:
1235:
1133:
1069:
755:
259:
183:
147:
51:
785:
1738:
1516:
1511:
1481:
1451:
1406:
1361:
1356:
1285:
1270:
1205:
1149:
1144:
1110:
1095:
1090:
1084:
191:
143:
84:
254:
is a star about 2,000 light years away in the southern constellation of
1709:
1476:
1250:
1174:
1100:
1079:
206:
187:
139:
910:
Extragalactic planet candidate around high-mass X-ray binary M51-ULS-1
1159:
1154:
1120:
1105:
994:
401:"Probing Planets in Extragalactic Galaxies Using Quasar Microlensing"
290:
273:
251:
119:
111:
63:
59:
499:"Scientists Find Evidence of Thousands of Planets in Distant Galaxy"
170:
In
September 2020, the detection of a candidate planet orbiting the
1549:
737:
672:
611:
417:
222:
209:
as the first known extragalactic planet candidate was published in
182:
of the X-ray source, which consists of a stellar remnant (either a
123:
99:
867:
822:
1561:
653:
503:
243:
1872:
1200:
1024:
959:
628:"Astronomers may have found the first planet in another galaxy"
255:
198:
94:, in the "A" lobe of the lensed quasar. It is predicted that a
47:
919:
129:
43:
2252:
2161:
719:
Reggiani, Henrique; Meléndez, Jorge (December 1, 2018).
2229:
216:
242:
A planet with a mass of at least 1.25 times that of
588:"First extragalactic exoplanet may have been found"
351:Planet Song M51 ULS 1b Messier 51 Whirlpool Galaxy
154:in 2018, in the lensing galaxy that lenses quasar
146:, was indirectly detected, for the first time, by
73:
1838:Habitability of K-type main-sequence star systems
1833:Habitability of F-type main-sequence star systems
725:Monthly Notices of the Royal Astronomical Society
2301:
1457:List of interstellar and circumstellar molecules
846:
718:
399:Dai, Xinyu; Guerras, Eduardo (2 February 2018).
232:
492:
490:
394:
392:
370:
935:
598:
456:
454:
78:
852:
197:. The planet would be slightly smaller than
804:
619:
487:
389:
27:Planet that is outside the Milky Way galaxy
942:
928:
604:
496:
451:
398:
178:was announced. The planet was detected by
1000:Exoplanet orbital and physical parameters
866:
821:
754:
736:
671:
610:
585:
524:
434:
416:
130:Evidence of a population of rogue planets
96:3-Earth-mass planet in the lensing galaxy
1868:List of potentially habitable exoplanets
557:
527:"Do alien worlds throng faraway galaxy?"
201:and orbit at a distance of some tens of
138:between stars, with masses ranging from
786:"Planet from another galaxy discovered"
497:Mandelbaum, Ryan F. (5 February 2018).
293: – Planet outside the Solar System
246:had been potentially discovered by the
14:
2302:
460:
2176:Geodynamics of terrestrial exoplanets
923:
625:
318:
1858:Habitability of yellow dwarf systems
1848:Habitability of neutron star systems
344:
342:
340:
314:
312:
2201:Sudarsky's gas giant classification
1828:Habitability of binary star systems
778:
586:Battersby, Stephen (10 June 2009).
24:
2186:Nexus for Exoplanet System Science
1843:Habitability of natural satellites
461:Zachos, Elaine (5 February 2018).
217:Disrupted planets of runaway stars
25:
2331:
1853:Habitability of red dwarf systems
903:
626:Crane, Leah (23 September 2020).
525:Schilling, Govert (6 July 1996).
337:
309:
2287:
2275:
2263:
2251:
2239:
1950:Stars with proto-planetary discs
1914:NASA Star and Exoplanet Database
1904:Extrasolar Planets Encyclopaedia
1392:Extraterrestrial sample curation
1023:
319:Smith, Kiona (26 October 2021).
90:system was observed in 1996, by
1863:Habitable zone for complex life
1301:Ultra-short period planet (USP)
1005:Methods of detecting exoplanets
712:
647:
579:
190:) and a massive star, likely a
74:Candidate extragalactic planets
2044:Discovered exoplanets by year
949:
571:. 11 June 2009. Archived from
537:
518:
364:
237:
13:
1:
2171:Extrasolar planets in fiction
1818:Extraterrestrial liquid water
371:Sandhya Ramesh (2021-10-29).
302:
248:European Southern Observatory
233:Refuted extragalactic planets
165:
2191:Planets in globular clusters
1808:Circumstellar habitable zone
855:Astronomy & Astrophysics
83:A microlensing event in the
7:
2151:Exoplanet naming convention
1261:Planet/Brown dwarf boundary
885:10.1051/0004-6361/201322132
554:(accessed 1 September 2009)
468:National Geographic Society
284:
105:
10:
2336:
1387:Extraterrestrial materials
1021:
690:10.1038/s41550-021-01495-w
79:Twin Quasar-related planet
2214:Discoveries of exoplanets
2209:
2138:
1927:
1886:
1788:
1700:
1607:
1540:
1417:Interplanetary dust cloud
1313:
1193:
1119:
1045:
1032:
987:
955:
840:10.1017/S1743921311020059
405:The Astrophysical Journal
1919:Open Exoplanet Catalogue
1894:Nearby Habitable Systems
1780:Transit-timing variation
436:10.3847/2041-8213/aaa5fb
2320:Extragalactic astronomy
2196:Small planet radius gap
1899:Exoplanet Data Explorer
1823:Galactic habitable zone
1397:Giant-impact hypothesis
877:2014A&A...562A.129J
54:located outside of the
36:extragalactic exoplanet
2156:Exoplanet phase curves
1994:Terrestrial candidates
1945:Multiplanetary systems
1909:NASA Exoplanet Archive
1592:Mean-motion resonances
1402:Gravitational collapse
1352:Circumstellar envelope
545:"The Q0957+561 Planet"
172:high-mass X-ray binary
152:University of Oklahoma
2031:Potentially habitable
1936:Exoplanetary systems
1878:Superhabitable planet
1637:F/Yellow-white dwarfs
1522:Sample-return mission
1422:Interplanetary medium
88:gravitational lensing
18:Extragalactic planets
2166:Extragalactic planet
2146:Carl Sagan Institute
1427:Interplanetary space
1342:Circumplanetary disk
1015:Planet-hosting stars
756:10.1093/mnras/sty104
543:Extrasolar Visions,
297:Solar System planets
32:extragalactic planet
1507:Protoplanetary disk
1487:Planetary migration
1442:Interstellar medium
1221:Circumtriple planet
1216:Circumbinary planet
832:2011IAUS..276..121K
747:2018MNRAS.475.3502R
682:2021NatAs...5.1297D
475:on February 5, 2018
427:2018ApJ...853L..27D
34:, also known as an
1472:Nebular hypothesis
1447:Interstellar space
1432:Interstellar cloud
1412:Internal structure
1347:Circumstellar disc
916:in September 2020.
792:. 18 November 2010
550:2012-03-30 at the
2227:
2226:
1803:Astrooceanography
1437:Interstellar dust
1309:
1308:
1185:Ultra-hot Neptune
1180:Ultra-hot Jupiter
1129:Eccentric Jupiter
979:Planetary science
790:ESO Press Release
666:(12): 1297–1307.
354:, 6 November 2021
213:in October 2021.
174:M51-ULS-1 in the
16:(Redirected from
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2278:
2268:
2267:
2266:
2256:
2255:
2244:
2243:
2242:
2235:
2181:Neptunian desert
1567:Tidally detached
1502:Planet formation
1492:Planetary system
1382:Exozodiacal dust
1372:Disrupted planet
1296:Ultra-cool dwarf
1226:Disrupted planet
1211:Chthonian planet
1043:
1042:
1027:
1010:Planetary system
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731:(3): 3502–3510.
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660:Nature Astronomy
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533:. No. 2037.
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471:. Archived from
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361:
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346:
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176:Whirlpool Galaxy
134:A population of
56:Milky Way Galaxy
21:
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2310:Types of planet
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2219:Search projects
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2134:
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1882:
1784:
1756:Radial velocity
1696:
1652:K/Orange dwarfs
1642:G/Yellow dwarfs
1603:
1597:Titius–Bode law
1536:
1467:Molecular cloud
1367:Detached object
1318:
1316:
1305:
1291:Toroidal planet
1281:Sub-brown dwarf
1189:
1115:
1087:(Super-Mercury)
1060:Coreless planet
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552:Wayback Machine
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279:Future of Earth
240:
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205:. The study of
168:
148:astrophysicists
136:unbound planets
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81:
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28:
23:
22:
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2315:Exoplanetology
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1768:Transit method
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1715:Direct imaging
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1379:
1377:Excretion disk
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1359:
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1332:Accretion disk
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1241:Eyeball planet
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905:
904:External links
902:
899:
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777:
711:
646:
618:
597:
578:
575:on 2009-06-24.
569:Thaindian News
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2101:
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2037:
2034:
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2027:
2024:
2020:
2017:
2015:
2012:
2010:
2007:
2005:
2002:
2001:
2000:
1997:
1995:
1992:
1990:
1987:
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1977:
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1972:
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1965:
1962:
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1938:
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1926:
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1897:
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1725:
1721:
1718:
1717:
1716:
1713:
1711:
1708:
1707:
1705:
1703:
1699:
1693:
1692:Yellow giants
1690:
1688:
1685:
1683:
1680:
1678:
1675:
1673:
1670:
1668:
1665:
1663:
1660:
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1488:
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1483:
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1478:
1475:
1473:
1470:
1468:
1465:
1463:
1462:Merging stars
1460:
1458:
1455:
1453:
1450:
1448:
1445:
1443:
1440:
1438:
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1433:
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1410:
1408:
1405:
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1400:
1398:
1395:
1393:
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1388:
1385:
1383:
1380:
1378:
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1373:
1370:
1368:
1365:
1363:
1360:
1358:
1355:
1353:
1350:
1348:
1345:
1343:
1340:
1338:
1337:Asteroid belt
1335:
1333:
1330:
1328:
1325:
1324:
1322:
1320:
1312:
1302:
1299:
1297:
1294:
1292:
1289:
1287:
1284:
1282:
1279:
1277:
1276:Pulsar planet
1274:
1272:
1269:
1267:
1264:
1262:
1259:
1257:
1254:
1252:
1249:
1247:
1244:
1242:
1239:
1237:
1234:
1232:
1231:Double planet
1229:
1227:
1224:
1222:
1219:
1217:
1214:
1212:
1209:
1207:
1204:
1202:
1199:
1198:
1196:
1192:
1186:
1183:
1181:
1178:
1176:
1173:
1171:
1170:Super-Neptune
1168:
1166:
1165:Super-Jupiter
1163:
1161:
1158:
1156:
1153:
1151:
1148:
1146:
1143:
1141:
1140:Helium planet
1138:
1135:
1132:
1130:
1127:
1126:
1124:
1122:
1118:
1112:
1109:
1107:
1104:
1102:
1099:
1097:
1094:
1092:
1089:
1086:
1083:
1081:
1078:
1076:
1075:Hycean planet
1073:
1071:
1068:
1066:
1065:Desert planet
1063:
1061:
1058:
1056:
1055:Carbon planet
1053:
1052:
1050:
1048:
1044:
1041:
1039:
1031:
1026:
1016:
1013:
1011:
1008:
1006:
1003:
1001:
998:
996:
993:
992:
990:
986:
980:
977:
971:
968:
967:
966:
963:
962:
961:
958:
957:
954:
945:
940:
938:
933:
931:
926:
925:
922:
915:
911:
908:
907:
894:
890:
886:
882:
878:
874:
869:
864:
860:
856:
849:
841:
837:
833:
829:
824:
819:
815:
807:
791:
787:
781:
766:
762:
757:
752:
748:
744:
739:
734:
730:
726:
722:
715:
707:
703:
699:
695:
691:
687:
683:
679:
674:
669:
665:
661:
657:
650:
635:
634:
633:New Scientist
629:
622:
613:
608:
601:
593:
592:New Scientist
589:
582:
574:
570:
566:
560:
553:
549:
546:
540:
532:
531:New Scientist
528:
521:
506:
505:
500:
493:
491:
474:
470:
469:
464:
457:
455:
446:
442:
437:
432:
428:
424:
419:
414:
410:
406:
402:
395:
393:
378:
374:
367:
353:
352:
345:
343:
341:
326:
322:
315:
313:
308:
298:
295:
292:
289:
288:
282:
280:
275:
271:
266:
264:
261:
257:
253:
249:
245:
230:
228:
224:
214:
212:
208:
204:
200:
196:
193:
189:
185:
181:
177:
173:
163:
161:
157:
156:RX J1131-1231
153:
149:
145:
144:Jovian masses
141:
137:
127:
125:
121:
117:
113:
103:
101:
97:
93:
89:
86:
71:
69:
66:, located in
65:
61:
57:
53:
49:
45:
41:
37:
33:
19:
2294:Solar System
2165:
2036:Proper names
1813:Earth analog
1798:Astrobiology
1790:Habitability
1727:Microlensing
1687:White dwarfs
1657:M/Red dwarfs
1647:Herbig Ae/Be
1632:Brown dwarfs
1574:Rogue planet
1555:Interstellar
1497:Planetesimal
1266:Planetesimal
1246:Giant planet
1236:Ecumenopolis
1134:Mini-Neptune
1070:Dwarf planet
913:
858:
854:
848:
813:
806:
794:. Retrieved
789:
780:
768:. Retrieved
728:
724:
714:
663:
659:
649:
639:25 September
637:. Retrieved
631:
621:
600:
591:
581:
573:the original
568:
559:
539:
530:
520:
508:. Retrieved
502:
477:. Retrieved
473:the original
466:
408:
404:
380:. Retrieved
376:
366:
356:, retrieved
350:
328:. Retrieved
324:
267:
260:Helmi stream
241:
220:
184:neutron star
169:
160:microlensing
133:
109:
92:R. E. Schild
82:
52:rogue planet
40:extroplanet,
39:
35:
31:
29:
2282:Outer space
2270:Spaceflight
2048:before 2000
1964:Discoveries
1739:Polarimetry
1627:Binary star
1517:Rubble pile
1512:Ring system
1482:Outer space
1452:Kuiper belt
1407:Hills cloud
1362:Debris disk
1357:Cosmic dust
1286:Sub-Neptune
1271:Protoplanet
1206:Brown dwarf
1194:Other types
1150:Hot Neptune
1145:Hot Jupiter
1136:(Gas dwarf)
1111:Super-Earth
1096:Ocean world
1091:Lava planet
1085:Iron planet
1047:Terrestrial
988:Main topics
861:: id.A129.
796:17 November
270:barycentric
238:HIP 13044 b
85:Twin Quasar
68:Sagittarius
2304:Categories
1959:Exoplanets
1940:Host stars
1887:Catalogues
1710:Astrometry
1672:Subdwarf B
1609:Host stars
1582:Retrograde
1477:Oort cloud
1315:Formation
1251:Mesoplanet
1175:Super-puff
1101:Mega-Earth
1080:Ice planet
965:Definition
950:Exoplanets
738:1802.07469
673:2009.08987
612:2009.08987
510:5 February
479:5 February
418:1802.00049
411:(2): L27.
382:2021-11-08
358:2021-11-08
330:2021-11-08
303:References
207:M51-ULS-1b
195:supergiant
188:black hole
166:M51-ULS-1b
2246:Astronomy
2053:2000–2009
2019:1501–2000
2014:1001–1500
1702:Detection
1667:Red giant
1327:Accretion
1319:evolution
1160:Ice giant
1155:Gas giant
1106:Sub-Earth
995:Exoplanet
914:Staringup
868:1401.0517
823:1011.4938
765:0035-8711
706:256726097
698:2397-3366
445:119078402
291:Exoplanet
274:HIP 11952
252:HIP 13044
227:HD 134440
150:from the
120:Milky Way
116:Andromeda
112:exoplanet
64:SWEEPS-04
60:SWEEPS-11
2009:501–1000
1989:Heaviest
1969:Extremes
1677:Subgiant
1550:Exocomet
893:55365608
548:Archived
377:ThePrint
285:See also
263:of stars
223:subdwarf
180:eclipses
124:PA-99-N2
106:PA-99-N2
100:YGKOW G1
2232:Portals
1984:Largest
1979:Nearest
1682:T Tauri
1578:Orbits
1562:Exomoon
1542:Systems
1256:Planemo
1121:Gaseous
873:Bibcode
828:Bibcode
743:Bibcode
678:Bibcode
504:Gizmodo
423:Bibcode
325:Inverse
244:Jupiter
46:-bound
1999:Kepler
1974:Firsts
1873:Tholin
1744:Timing
1662:Pulsar
1587:Trojan
1201:Blanet
960:Planet
891:
770:10 May
763:
704:
696:
443:
256:Fornax
211:Nature
199:Saturn
192:B-type
118:, the
48:planet
38:or an
2258:Stars
2139:Other
2004:1–500
1929:Lists
1038:types
1033:Sizes
912:from
889:S2CID
863:arXiv
818:arXiv
733:arXiv
702:S2CID
668:arXiv
607:arXiv
441:S2CID
413:arXiv
225:star
186:or a
140:Lunar
42:is a
2128:2024
2123:2023
2118:2022
2113:2021
2108:2020
2103:2019
2098:2018
2093:2017
2088:2016
2083:2015
2078:2014
2073:2013
2068:2012
2063:2011
2058:2010
1773:list
1761:list
1749:list
1732:list
1720:list
1317:and
1035:and
798:2011
772:2018
761:ISSN
694:ISSN
641:2020
512:2018
481:2018
221:The
62:and
44:star
970:IAU
881:doi
859:562
836:doi
751:doi
729:475
686:doi
431:doi
409:853
281:).
158:by
142:to
114:in
50:or
30:An
2306::
2026:K2
887:.
879:.
871:.
857:.
834:.
826:.
788:.
759:.
749:.
741:.
727:.
723:.
700:.
692:.
684:.
676:.
662:.
658:.
630:.
590:.
567:.
529:.
501:.
489:^
465:.
453:^
439:.
429:.
421:.
407:.
403:.
391:^
375:.
339:^
323:.
311:^
203:AU
162:.
98:,
2234::
1622:B
1617:A
943:e
936:t
929:v
895:.
883::
875::
865::
842:.
838::
830::
820::
800:.
774:.
753::
745::
735::
708:.
688::
680::
670::
664:5
643:.
615:.
609::
594:.
514:.
483:.
447:.
433::
425::
415::
385:.
333:.
20:)
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