1593:
1603:
1636:
20:
92:, however it is also possible that different arachnoids are formed by different processes. One possible explanation is that an upwelling of magma from the interior of the planet pushed up on the surface, causing cracks. An alternate theory concerning their origin is that they are a precursor to
1458:
1021:
1463:
1448:
1083:
1677:
1059:
699:
694:
666:
661:
382:
377:
1523:
1696:
148:
1711:
324:
99:
Much of what is known about arachnoids is the result of studies performed by C.B. Dawson and L.S. Crumpler.
208:
1518:
1496:
1706:
128:
93:
1701:
1578:
1573:
946:
875:
840:
1670:
1301:
747:
651:
1651:
1443:
1360:
825:
467:
435:
1468:
1453:
900:
860:
1502:
1491:
1383:
1327:
1295:
1290:
1041:
1036:
1031:
1026:
1016:
1011:
616:
586:
223:
1417:
1334:
936:
920:
190:
8:
1663:
1606:
1341:
880:
815:
372:
317:
273:
179:
194:
885:
830:
820:
800:
674:
566:
473:
78:
1602:
1568:
1427:
1131:
1126:
1121:
1098:
915:
905:
850:
845:
810:
1553:
1548:
1103:
1003:
983:
941:
780:
775:
601:
387:
344:
37:
501:
156:
1243:
1141:
993:
865:
855:
835:
805:
790:
770:
765:
760:
755:
443:
213:. As a work of the United States Federal Government, it is in the public domain.
211:
113:
85:, and can span 200 kilometers. Over 90 arachnoids have been identified on Venus.
1647:
1596:
988:
910:
895:
785:
712:
707:
684:
679:
621:
581:
561:
511:
496:
310:
1690:
1563:
1366:
1069:
870:
795:
727:
717:
571:
551:
531:
415:
248:
108:
73:. They are of unknown origin, and have been found only on the surface of the
1473:
1309:
1278:
1064:
737:
732:
606:
591:
521:
506:
448:
297:
118:
74:
28:
1390:
722:
646:
596:
546:
536:
486:
481:
410:
298:
NASA Astronomy
Picture of the Day: Arachnoids on Venus (20 January 1998)
1270:
1196:
1171:
956:
951:
641:
636:
631:
611:
541:
491:
453:
425:
420:
70:
1543:
1353:
1263:
1256:
1249:
1236:
1231:
1226:
1221:
1216:
1211:
1206:
1161:
1146:
1136:
576:
556:
526:
516:
19:
1635:
1558:
1422:
1412:
1201:
1191:
1186:
1181:
1176:
1166:
1156:
1151:
1116:
1051:
626:
82:
1407:
890:
89:
1347:
1319:
1314:
1283:
1110:
58:
1643:
333:
123:
1620:
149:"Planetary Names: Corona, coronae: Trotula Corona on Venus"
40:
49:
302:
55:
52:
1619:
This article incorporates text from a public-domain
61:
46:
43:
274:"Characteristics of Arachnoids from Magellan Data"
1688:
271:
1671:
318:
69:is a large geological structure resembling a
1678:
1664:
325:
311:
16:Large structure of unknown origin on Venus
81:ovals surrounded by a complex network of
281:Lunar and Planetary Institute Conference
18:
177:
1689:
187:Lunar and Planetary Science Conference
306:
1642:This article relating to the planet
1630:
246:
207:This article contains text from the
180:"The Four Arachnoid Groups of Venus"
201:
13:
14:
1723:
291:
265:
23:Venusian arachnoid Trotula Corona
1634:
1601:
1592:
1591:
36:
88:Arachnoids could be related to
240:
216:
171:
141:
1:
134:
1650:. You can help Knowledge by
209:Astronomy Picture of the Day
7:
1524:Artificial objects on Venus
1519:Geological mapping of Venus
283:: 383–384 – via LPSC.
102:
10:
1728:
1629:
153:planetarynames.wr.usgs.gov
1697:Surface features of Venus
1587:
1574:Neith (hypothetical moon)
1536:
1511:
1482:
1436:
1400:
1375:
1091:
1082:
1050:
1002:
976:
969:
929:
746:
693:
660:
466:
434:
403:
396:
360:
353:
340:
332:
1302:Pioneer Venus Multiprobe
652:List of coronae on Venus
224:"WTP: Venus: Arachnoids"
1712:Planetary science stubs
1444:European Venus Explorer
1060:Venus-crosser asteroids
1304: / Pioneer 13
1298: / Pioneer 12
178:Kostama, V.P. (2002).
24:
1296:Pioneer Venus Orbiter
617:Scalloped margin dome
587:Quetzalpetlatl Corona
272:Dawson and Crumpler.
22:
247:Hamilton, Calvin J.
195:2002LPI....33.1115K
675:Guinevere Planitia
567:Nightingale Corona
25:
1707:Planetary geology
1659:
1658:
1615:
1614:
1532:
1531:
1428:Venus Life Finder
1099:Sputnik programme
1078:
1077:
965:
964:
462:
461:
159:on 1 October 2015
77:. They appear as
1719:
1702:Geology of Venus
1680:
1673:
1666:
1638:
1631:
1605:
1595:
1594:
1497:Inspiration Mars
1089:
1088:
974:
973:
947:Surface features
602:Sacajawea Patera
401:
400:
388:Mapping of Venus
358:
357:
345:Outline of Venus
327:
320:
313:
304:
303:
285:
284:
278:
269:
263:
262:
260:
259:
244:
238:
237:
235:
234:
228:pds.jpl.nasa.gov
220:
214:
205:
199:
198:
197:– via lpi.
184:
175:
169:
168:
166:
164:
155:. Archived from
145:
68:
67:
64:
63:
60:
57:
54:
51:
48:
45:
42:
1727:
1726:
1722:
1721:
1720:
1718:
1717:
1716:
1687:
1686:
1685:
1684:
1627:
1616:
1611:
1583:
1528:
1507:
1484:
1478:
1432:
1396:
1371:
1342:Cassini–Huygens
1244:Mariner program
1074:
1046:
998:
961:
925:
742:
698:
689:
665:
656:
472:
470:
458:
444:Aphrodite Terra
430:
392:
349:
336:
331:
294:
289:
288:
276:
270:
266:
257:
255:
245:
241:
232:
230:
222:
221:
217:
206:
202:
182:
176:
172:
162:
160:
147:
146:
142:
137:
114:Geysers on Mars
105:
39:
35:
17:
12:
11:
5:
1725:
1715:
1714:
1709:
1704:
1699:
1683:
1682:
1675:
1668:
1660:
1657:
1656:
1639:
1613:
1612:
1610:
1609:
1599:
1588:
1585:
1584:
1582:
1581:
1576:
1571:
1566:
1561:
1556:
1551:
1546:
1540:
1538:
1534:
1533:
1530:
1529:
1527:
1526:
1521:
1515:
1513:
1509:
1508:
1506:
1505:
1500:
1494:
1488:
1486:
1480:
1479:
1477:
1476:
1471:
1466:
1461:
1456:
1451:
1446:
1440:
1438:
1434:
1433:
1431:
1430:
1425:
1420:
1415:
1410:
1404:
1402:
1398:
1397:
1395:
1394:
1387:
1379:
1377:
1373:
1372:
1370:
1369:
1364:
1357:
1350:
1345:
1338:
1331:
1324:
1323:
1322:
1317:
1307:
1306:
1305:
1299:
1288:
1287:
1286:
1276:
1275:
1274:
1267:
1260:
1253:
1241:
1240:
1239:
1234:
1229:
1224:
1219:
1214:
1209:
1204:
1199:
1194:
1189:
1184:
1179:
1174:
1169:
1164:
1159:
1154:
1149:
1144:
1139:
1134:
1129:
1124:
1119:
1108:
1107:
1106:
1095:
1093:
1086:
1080:
1079:
1076:
1075:
1073:
1072:
1067:
1062:
1056:
1054:
1048:
1047:
1045:
1044:
1039:
1034:
1029:
1024:
1019:
1014:
1008:
1006:
1000:
999:
997:
996:
991:
986:
980:
978:
971:
967:
966:
963:
962:
960:
959:
954:
949:
944:
939:
933:
931:
927:
926:
924:
923:
918:
913:
908:
903:
898:
893:
888:
883:
878:
873:
868:
863:
858:
853:
848:
843:
838:
833:
828:
826:Goeppert-Mayer
823:
818:
813:
808:
803:
798:
793:
788:
783:
778:
773:
768:
763:
758:
752:
750:
744:
743:
741:
740:
735:
730:
725:
720:
715:
713:Artemis Chasma
710:
708:Aikhulu Chasma
704:
702:
691:
690:
688:
687:
685:Sedna Planitia
682:
680:Lakshmi Planum
677:
671:
669:
658:
657:
655:
654:
649:
644:
639:
634:
629:
624:
622:Siddons Patera
619:
614:
609:
604:
599:
594:
589:
584:
582:Pavlova Corona
579:
574:
569:
564:
562:Maxwell Montes
559:
554:
549:
544:
539:
534:
529:
524:
519:
514:
512:Ciuacoatl Mons
509:
504:
499:
497:Artemis Corona
494:
489:
484:
478:
476:
464:
463:
460:
459:
457:
456:
451:
446:
440:
438:
432:
431:
429:
428:
423:
418:
413:
407:
405:
398:
394:
393:
391:
390:
385:
380:
375:
370:
364:
362:
355:
351:
350:
348:
347:
341:
338:
337:
330:
329:
322:
315:
307:
301:
300:
293:
292:External links
290:
287:
286:
264:
253:solarviews.com
239:
215:
200:
170:
139:
138:
136:
133:
132:
131:
126:
121:
116:
111:
104:
101:
15:
9:
6:
4:
3:
2:
1724:
1713:
1710:
1708:
1705:
1703:
1700:
1698:
1695:
1694:
1692:
1681:
1676:
1674:
1669:
1667:
1662:
1661:
1655:
1653:
1649:
1645:
1640:
1637:
1633:
1632:
1628:
1625:
1624:
1622:
1608:
1604:
1600:
1598:
1590:
1589:
1586:
1580:
1577:
1575:
1572:
1570:
1567:
1565:
1562:
1560:
1557:
1555:
1552:
1550:
1547:
1545:
1542:
1541:
1539:
1535:
1525:
1522:
1520:
1517:
1516:
1514:
1510:
1504:
1501:
1498:
1495:
1493:
1490:
1489:
1487:
1481:
1475:
1472:
1470:
1467:
1465:
1462:
1460:
1457:
1455:
1452:
1450:
1447:
1445:
1442:
1441:
1439:
1435:
1429:
1426:
1424:
1421:
1419:
1416:
1414:
1411:
1409:
1406:
1405:
1403:
1399:
1393:
1392:
1388:
1386:
1385:
1381:
1380:
1378:
1374:
1368:
1367:Venus Express
1365:
1363:
1362:
1358:
1356:
1355:
1351:
1349:
1346:
1344:
1343:
1339:
1337:
1336:
1332:
1330:
1329:
1325:
1321:
1318:
1316:
1313:
1312:
1311:
1308:
1303:
1300:
1297:
1294:
1293:
1292:
1291:Pioneer Venus
1289:
1285:
1282:
1281:
1280:
1277:
1273:
1272:
1268:
1266:
1265:
1261:
1259:
1258:
1254:
1252:
1251:
1247:
1246:
1245:
1242:
1238:
1235:
1233:
1230:
1228:
1225:
1223:
1220:
1218:
1215:
1213:
1210:
1208:
1205:
1203:
1200:
1198:
1195:
1193:
1190:
1188:
1185:
1183:
1180:
1178:
1175:
1173:
1170:
1168:
1165:
1163:
1160:
1158:
1155:
1153:
1150:
1148:
1145:
1143:
1140:
1138:
1135:
1133:
1130:
1128:
1125:
1123:
1120:
1118:
1115:
1114:
1112:
1109:
1105:
1102:
1101:
1100:
1097:
1096:
1094:
1090:
1087:
1085:
1081:
1071:
1068:
1066:
1065:Venus trojans
1063:
1061:
1058:
1057:
1055:
1053:
1049:
1043:
1040:
1038:
1035:
1033:
1030:
1028:
1025:
1023:
1020:
1018:
1015:
1013:
1010:
1009:
1007:
1005:
1001:
995:
992:
990:
987:
985:
982:
981:
979:
975:
972:
968:
958:
955:
953:
950:
948:
945:
943:
940:
938:
935:
934:
932:
928:
922:
919:
917:
914:
912:
909:
907:
904:
902:
899:
897:
894:
892:
889:
887:
884:
882:
879:
877:
874:
872:
869:
867:
864:
862:
861:Maria Celeste
859:
857:
854:
852:
849:
847:
844:
842:
839:
837:
834:
832:
829:
827:
824:
822:
819:
817:
814:
812:
809:
807:
804:
802:
799:
797:
794:
792:
789:
787:
784:
782:
779:
777:
774:
772:
769:
767:
764:
762:
759:
757:
754:
753:
751:
749:
745:
739:
736:
734:
731:
729:
728:Devana Chasma
726:
724:
721:
719:
718:Baltis Vallis
716:
714:
711:
709:
706:
705:
703:
701:
696:
692:
686:
683:
681:
678:
676:
673:
672:
670:
668:
663:
659:
653:
650:
648:
645:
643:
640:
638:
635:
633:
630:
628:
625:
623:
620:
618:
615:
613:
610:
608:
605:
603:
600:
598:
595:
593:
590:
588:
585:
583:
580:
578:
575:
573:
572:Onatah Corona
570:
568:
565:
563:
560:
558:
555:
553:
552:Jaszai Patera
550:
548:
545:
543:
540:
538:
535:
533:
532:Heng-o Corona
530:
528:
525:
523:
520:
518:
515:
513:
510:
508:
505:
503:
502:Baʽhet Corona
500:
498:
495:
493:
490:
488:
485:
483:
480:
479:
477:
475:
469:
465:
455:
452:
450:
447:
445:
442:
441:
439:
437:
433:
427:
424:
422:
419:
417:
416:Asteria Regio
414:
412:
409:
408:
406:
402:
399:
395:
389:
386:
384:
381:
379:
376:
374:
371:
369:
366:
365:
363:
359:
356:
352:
346:
343:
342:
339:
335:
328:
323:
321:
316:
314:
309:
308:
305:
299:
296:
295:
282:
275:
268:
254:
250:
243:
229:
225:
219:
212:
210:
204:
196:
192:
188:
181:
174:
158:
154:
150:
144:
140:
130:
127:
125:
122:
120:
117:
115:
112:
110:
109:Chaos terrain
107:
106:
100:
97:
95:
91:
86:
84:
80:
76:
72:
66:
34:
30:
21:
1652:expanding it
1641:
1626:
1618:
1617:
1503:Terraforming
1492:Colonization
1474:Shukrayaan-1
1389:
1382:
1359:
1352:
1340:
1333:
1326:
1310:Vega program
1279:Zond program
1269:
1262:
1255:
1248:
1142:Venera 1964A
738:Ganis Chasma
733:Diana Chasma
607:Sachs Patera
592:Pancake dome
522:Fotla Corona
507:Boala Corona
449:Ishtar Terra
367:
280:
267:
256:. Retrieved
252:
249:"Arachnoids"
242:
231:. Retrieved
227:
218:
203:
186:
173:
161:. Retrieved
157:the original
152:
143:
119:Pancake dome
98:
87:
75:planet Venus
32:
29:astrogeology
26:
1391:BepiColombo
1084:Exploration
937:Geodynamics
921:Yablochkina
723:Dali Chasma
647:Zisa Corona
597:Renpet Mons
547:Irnini Mons
537:Iaso Tholus
487:Akna Montes
482:Abeona Mons
411:Alpha Regio
378:Dune fields
96:formation.
1691:Categories
1579:Phosphorus
1554:In fiction
1549:In culture
1271:Mariner 10
1197:Kosmos 482
1172:Kosmos 167
1132:Sputnik 21
1127:Sputnik 20
1122:Sputnik 19
957:Venusquake
952:Venus snow
881:Merit Ptah
816:De Lalande
642:Ushas Mons
637:Theia Mons
632:Skadi Mons
612:Sapas Mons
542:Idunn Mons
492:Anala Mons
454:Lada Terra
426:Ovda Regio
421:Beta Regio
373:Atmosphere
258:2017-04-06
233:2017-04-06
163:26 January
135:References
79:concentric
71:spider web
1569:Mythology
1544:Cytherean
1354:MESSENGER
1264:Mariner 5
1257:Mariner 2
1250:Mariner 1
1237:Venera 16
1232:Venera 15
1227:Venera 14
1222:Venera 13
1217:Venera 12
1212:Venera 11
1207:Venera 10
1162:Kosmos 96
1147:Kosmos 27
1137:Kosmos 21
1104:Sputnik 7
1052:Asteroids
970:Astronomy
886:Mona Lisa
831:Golubkina
821:Dickinson
801:Cleopatra
577:Ozza Mons
557:Maat Mons
527:Gula Mons
517:Fand Mons
474:volcanoes
468:Mountains
368:Arachnoid
354:Geography
83:fractures
33:arachnoid
1623:website.
1597:Category
1559:Hesperus
1483:Proposed
1437:Proposed
1423:Venera-D
1413:EnVision
1384:Akatsuki
1328:Magellan
1202:Venera 9
1192:Venera 8
1187:Venera 7
1182:Venera 6
1177:Venera 5
1167:Venera 4
1157:Venera 3
1152:Venera 2
1117:Venera 1
1113:program
1004:Transits
916:Wheatley
906:Stefania
851:Isabella
846:Guilbert
811:Danilova
667:plateaus
627:Sif Mons
383:Features
189:: 1115.
103:See also
90:volcanos
1537:Related
1499:(flyby)
1418:VERITAS
1408:DAVINCI
1401:Planned
1376:Current
1361:Shin'en
1335:Galileo
984:Aspects
977:General
942:Geology
891:Nanichi
876:Meitner
841:Gregory
781:Aurelia
776:Ariadne
748:Craters
700:valleys
695:Canyons
397:Regions
361:General
191:Bibcode
129:Coronae
94:coronae
1607:Portal
1485:crewed
1459:VISAGE
1348:IKAROS
1320:Vega 2
1315:Vega 1
1284:Zond 1
1111:Venera
1070:Zoozve
994:Phases
866:Mariko
856:Jeanne
836:Grimke
806:Cunitz
791:Barton
771:Alcott
766:Agnesi
761:Adivar
756:Addams
662:Plains
436:Terrae
1646:is a
1644:Venus
1512:Other
989:Orbit
930:Other
911:Wanda
896:Riley
786:Balch
404:Regio
334:Venus
277:(PDF)
183:(PDF)
124:Rille
31:, an
1648:stub
1621:NASA
1564:Life
1464:VICI
1454:VISE
1449:VAMP
1092:Past
1042:2012
1037:2004
1032:1882
1027:1874
1022:1769
1017:1761
1012:1639
901:Ruth
871:Mead
796:Buck
165:2022
1469:VOX
697:and
664:and
471:and
27:In
1693::
279:.
251:.
226:.
185:.
151:.
59:ɔɪ
1679:e
1672:t
1665:v
1654:.
326:e
319:t
312:v
261:.
236:.
193::
167:.
65:/
62:d
56:n
53:k
50:æ
47:r
44:ˈ
41:ə
38:/
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
