138:
craters appear to have nearly complete rims and interior terraced walls, suggesting that they formed more recently than the other nearby shallower craters of similar size. There are two possible explanations for their dark halos: (1) Darker subsurface material may have been excavated during the explosions from the asteroid or comet impacts that produced the craters. (2) Large cratering explosions may have melted a fraction of the rocky surface material involved in the explosions, splashing so-called "impact melts" across the surface; such melted rock is often darker (lower albedo) than the pre-impact target material. In either case, the association of the dark material with relatively recently formed craters suggests that the processes that gradually homogenize
Mercury's surface materials have not yet had time to reduce the contrast of these dark halos. The crater with associated dark material in the lower-left part of this image is about 100 km (60 miles) in diameter, and the crater with patches of dark material in the upper right is about 70 km (40 miles) across. These dark-halo craters, located near Mercury's south pole, are also visible in the previously released false-color image created from three Wide Angle Camera (WAC) frames.
33:
255:
206:
244:
81:
137:
As MESSENGER flew by
Mercury, the Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS) captured this view on January 14, 2008. Two of the larger craters in this image appear to have darkened crater rims and partial "halos" of dark material immediately surrounding the craters. Both
554:
348:
47:
43:
37:
135:
The crater with a dark halo in the lower left of this image was named Neruda in April 2008. The crater in the upper right was given the name Sher-Gil in
November 2008.
92:
60:
327:
joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use.
344:
324:
571:
Uploaded a work by NASA/Johns
Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington from with UploadWizard
302:
276:
498:
427:
410:
463:
334:
287:
476:
447:
491:
394:
159:
483:
553:
548:
51:
32:
298:
581:
The following pages on the
English Knowledge (XXG) use this file (pages on other projects are not listed):
595:
283:
352:
355:
states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."
100:
590:
328:
169:
NASA/Johns
Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
585:
339:
315:
309:
231:
227:
214:
87:
222:. NASA copyright policy states that "NASA material is not protected by copyright
564:
149:
272:
235:
521:
Click on a date/time to view the file as it appeared at that time.
306:
301:
data may be copyrighted if they are not explicitly produced by the
219:
200:
75:
253:
242:
282:
The NASA website hosts a large number of images from the
218:
in the United States because it was solely created by
65:(1,018 × 1,024 pixels, file size: 964 KB, MIME type:
119:
99:
Commons is a freely licensed media file repository.
499:
work of the federal government of the United States
290:, and other non-American space agencies. These are
275:, insignia and emblems is restricted per U.S. law
80:
125:Neruda and Sher-Gil craters EN0108828161M.jpg
8:
140:Image Mission Elapsed Time (MET): 108828161
523:
374:
180:
583:
461:
445:
425:
408:
392:
389:
370:
363:
205:
7:
347:(NSSDC) site has been known to host
338:(APOD) web site may be copyrighted.
512:
383:
377:
345:National Space Science Data Center
160:CRATERS WITH DARK HALOS ON MERCURY
129:
112:
58:
382:
368:
204:
79:
21:
365:
130:
14:
364:
26:
1:
390:Items portrayed in this file
335:Astronomy Picture of the Day
378:Neruda and Sher-Gil craters
612:
232:NASA copyright policy page
513:
16:
484:United States of America
367:
86:This is a file from the
570:
477:applies to jurisdiction
332:Images featured on the
165:
155:
148:
145:
122:
90:. Information from its
299:Hubble Space Telescope
258:
247:
93:description page there
36:Size of this preview:
596:User:Jstuby/MESSENGER
325:SOHO (ESA & NASA)
294:in the public domain.
257:
246:
549:17:04, 18 March 2022
492:determination method
288:Russian space agency
236:JPL Image Use Policy
212:This file is in the
52:1,018 × 1,024 pixels
349:copyrighted content
297:Materials based on
42:Other resolutions:
259:
248:
591:Sher-Gil (crater)
574:
376:
362:
361:
353:photo gallery FAQ
266:
228:Template:PD-USGov
199:
198:
173:
172:
108:
107:
88:Wikimedia Commons
603:
561:
501:
496:
486:
481:
448:copyright status
318:
312:
262:
256:
245:
208:
207:
201:
195:
192:
189:
186:
181:
151:
150:21 February 2008
134:
126:
120:
104:
83:
82:
76:
70:
68:
55:
48:477 × 480 pixels
44:239 × 240 pixels
38:596 × 600 pixels
611:
610:
606:
605:
604:
602:
601:
600:
586:Neruda (crater)
582:
575:
567:
559:
515:
514:
511:
510:
509:
508:
507:
506:
505:
504:
503:
502:
497:
494:
488:
487:
482:
479:
470:
469:
468:
466:
454:
453:
452:
450:
439:
438:
437:
436:
435:
434:
433:
432:
430:
419:
418:
417:
416:
415:
413:
401:
400:
399:
397:
381:
380:
379:
358:
316:
310:
292:not necessarily
254:
243:
193:
190:
187:
184:
179:
174:
141:
124:
117:
110:
109:
98:
97:
96:is shown below.
72:
66:
64:
57:
56:
41:
12:
11:
5:
609:
607:
599:
598:
593:
588:
580:
579:
578:
573:
572:
569:
565:
562:
558:1,018 × 1,024
556:
551:
546:
542:
541:
538:
535:
532:
529:
526:
519:
518:
490:
489:
475:
474:
473:
472:
471:
467:
462:
460:
459:
458:
457:
456:
455:
451:
446:
444:
443:
442:
441:
440:
431:
426:
424:
423:
422:
421:
420:
414:
409:
407:
406:
405:
404:
403:
402:
398:
393:
391:
388:
387:
386:
385:
384:
373:
372:
369:
366:
360:
359:
357:
356:
341:
330:
321:
295:
280:
268:
260:
250:
249:
240:
209:
197:
196:
178:
175:
171:
170:
167:
163:
162:
157:
153:
152:
147:
143:
142:
127:
118:
116:
113:
111:
106:
105:
84:
74:
73:
35:
31:
30:
29:
24:
19:
13:
10:
9:
6:
4:
3:
2:
608:
597:
594:
592:
589:
587:
584:
576:
568:
563:
557:
555:
552:
550:
547:
544:
543:
539:
536:
533:
530:
527:
525:
524:
522:
516:
500:
493:
485:
478:
465:
464:public domain
449:
429:
412:
396:
354:
350:
346:
342:
340:
337:
336:
331:
329:
326:
322:
319:
317:{{Cc-Hubble}}
313:
311:{{PD-Hubble}}
307:
304:
300:
296:
293:
289:
285:
281:
278:
274:
270:
269:
267:
265:
261:
252:
251:
241:
239:
237:
233:
229:
225:
221:
217:
216:
215:public domain
210:
203:
202:
188:Public domain
185:Public domain
183:
182:
176:
168:
164:
161:
158:
154:
144:
139:
133:
128:
121:
114:
102:
95:
94:
89:
85:
78:
77:
71:
62:
61:Original file
53:
49:
45:
39:
34:
28:
25:
23:
20:
18:
15:
520:
517:File history
333:
291:
263:
224:unless noted
223:
213:
211:
136:
131:
101:You can help
91:
59:
22:File history
277:14 CFR 1221
123:Description
577:File usage
534:Dimensions
273:NASA logos
67:image/jpeg
27:File usage
531:Thumbnail
528:Date/Time
308:See also
264:Warnings:
177:Licensing
132:English:
560:(964 KB)
428:Sher-Gil
371:Captions
226:". (See
545:current
540:Comment
395:depicts
375:English
271:Use of
115:Summary
63:
566:Jstuby
411:Neruda
351:. Its
284:Soviet
166:Author
156:Source
303:STScI
194:false
191:false
537:User
343:The
323:The
314:and
220:NASA
146:Date
17:File
234:or
495::
480::
238:.)
230:,
50:|
46:|
40:.
320:.
305:.
286:/
279:.
103:.
69:)
54:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
