468:
133:
327:
314:
142:
540:
36:
504:
528:
480:
516:
492:
205:
136:
Umbra, penumbra and antumbra of Earth and images that could be seen at some points in these areas (Note: the relative size and distance of the bodies shown are not to scale.)“… The Earth’s shadow has two distinct parts,… the UMBRA is the part of the shadow where all direct sunlight is blocked by the
298:
357:, in which a bright ring is visible around the eclipsing body. If the observer moves closer to the light source, the apparent size of the occluding body increases until it causes a full umbra.
333:
in front of the Sun, an extreme version of an annular eclipse. Mercury is visible as a black dot below and to the left of the center. The dark area above the center of the solar disk is a
216:(Latin for "shadow") is the innermost and darkest part of a shadow, where the light source is completely blocked by the occluding body. An observer within the umbra experiences a total
53:
420:
353:"shadow") is the region from which the occluding body appears entirely within the disc of the light source. An observer in this region experiences an
278:"shadow") is the region in which only a portion of the light source is obscured by the occluding body. An observer in the penumbra experiences a
467:
100:
72:
79:
119:
291:
86:
57:
68:
251:
is 3.7 times the Moon's, its umbra extends correspondingly farther: roughly 1.4 million km (870,000 mi).
560:
458:
236:
260:
132:
93:
46:
198:
400:
392:
326:
313:
532:
248:
520:
508:
330:
141:
371:
306:
302:
297:
286:
of the light source is obscured (i.e., the umbra is a subset of the penumbra). For example,
565:
484:
229:
167:
435:
366:
354:
279:
225:
175:
137:
Earth; the PENUMBRA of the shadow is where the Earth only blocks some of the sunlight.”
544:
472:
182:
554:
539:
496:
217:
171:
35:
186:
17:
334:
243:
to the apex of its umbra is roughly equal to that between the Moon and
282:. An alternative definition is that the penumbra is the region where
163:
204:
491:
220:. The umbra of a round body occluding a round light source forms a
325:
312:
296:
244:
203:
140:
131:
208:
Umbra, penumbra, and antumbra formed through windows and shutters
287:
240:
221:
185:, though they are sometimes used to describe levels, such as in
294:
defines that a body in the umbra is also within the penumbra.
29:
178:(such as a point source) of light, only the umbra is cast.
397:
181:
These names are most often used for the shadows cast by
456:
317:
Earth's umbra, as seen during a partial lunar eclipse
166:, created by any light source after impinging on an
60:. Unsourced material may be challenged and removed.
305:, showing how the umbral cone extends beyond the
259:"Penumbra" redirects here. For other uses, see
425:Navigation and Ancillary Information Facility.
292:Navigation and Ancillary Information Facility
8:
197:"Umbra" redirects here. For other uses, see
393:"Lecture 9: Eclipses of the Sun & Moon"
247:: 384,402 km (238,856 mi). Since
309:The Moon is indicated by the yellow dot.)
120:Learn how and when to remove this message
463:
383:
7:
58:adding citations to reliable sources
25:
436:"Eclipses: What Is the Antumbra?"
538:
526:
514:
502:
490:
478:
466:
34:
422:Event Finding Subsystem Preview
45:needs additional citations for
224:. When viewed from the cone's
162:are three distinct parts of a
69:"Umbra, penumbra and antumbra"
1:
582:
258:
196:
145:Umbra (A) and penumbra (B)
27:Distinct parts of a shadow
261:Penumbra (disambiguation)
338:
318:
310:
209:
199:Umbra (disambiguation)
146:
138:
401:Ohio State University
329:
316:
300:
274:"almost, nearly" and
207:
144:
135:
230:appear the same size
170:object. Assuming no
54:improve this article
222:right circular cone
339:
331:Transit of Mercury
319:
311:
210:
147:
139:
561:Optical phenomena
307:orbit of the Moon
301:Scale diagram of
228:, the two bodies
130:
129:
122:
104:
16:(Redirected from
573:
543:
542:
531:
530:
529:
519:
518:
517:
507:
506:
505:
495:
494:
483:
482:
481:
471:
470:
462:
451:
450:
448:
446:
432:
426:
418:
412:
411:
409:
407:
391:Pogge, Richard.
388:
345:(from the Latin
270:(from the Latin
249:Earth's diameter
183:celestial bodies
125:
118:
114:
111:
105:
103:
62:
38:
30:
21:
581:
580:
576:
575:
574:
572:
571:
570:
551:
550:
549:
537:
527:
525:
515:
513:
503:
501:
489:
479:
477:
465:
457:
455:
454:
444:
442:
440:timeanddate.com
434:
433:
429:
419:
415:
405:
403:
390:
389:
385:
380:
367:Antisolar point
363:
355:annular eclipse
324:
280:partial eclipse
264:
257:
202:
195:
176:collimated beam
149:
126:
115:
109:
106:
63:
61:
51:
39:
28:
23:
22:
15:
12:
11:
5:
579:
577:
569:
568:
563:
553:
552:
548:
547:
535:
523:
511:
499:
487:
475:
453:
452:
427:
413:
382:
381:
379:
376:
375:
374:
372:Earth's shadow
369:
362:
359:
323:
320:
303:Earth's shadow
256:
253:
194:
191:
128:
127:
42:
40:
33:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
578:
567:
564:
562:
559:
558:
556:
546:
541:
536:
534:
524:
522:
512:
510:
500:
498:
493:
488:
486:
476:
474:
469:
464:
460:
441:
437:
431:
428:
424:
423:
417:
414:
402:
398:
394:
387:
384:
377:
373:
370:
368:
365:
364:
360:
358:
356:
352:
349:"before" and
348:
344:
336:
332:
328:
321:
315:
308:
304:
299:
295:
293:
289:
285:
281:
277:
273:
269:
262:
254:
252:
250:
246:
242:
238:
233:
231:
227:
223:
219:
215:
206:
200:
192:
190:
188:
184:
179:
177:
173:
169:
165:
161:
157:
153:
143:
134:
124:
121:
113:
110:December 2012
102:
99:
95:
92:
88:
85:
81:
78:
74:
71: –
70:
66:
65:Find sources:
59:
55:
49:
48:
43:This article
41:
37:
32:
31:
19:
533:Solar System
443:. Retrieved
439:
430:
421:
416:
404:. Retrieved
396:
386:
350:
346:
342:
340:
283:
275:
271:
267:
265:
234:
213:
211:
180:
159:
155:
151:
148:
116:
107:
97:
90:
83:
76:
64:
52:Please help
47:verification
44:
521:Outer space
509:Spaceflight
284:some or all
218:occultation
172:diffraction
555:Categories
378:References
80:newspapers
485:Astronomy
239:from the
406:July 16,
361:See also
343:antumbra
322:Antumbra
268:penumbra
255:Penumbra
237:distance
187:sunspots
174:, for a
160:antumbra
156:penumbra
18:Penumbra
566:Shadows
545:Science
473:Physics
459:Portals
335:sunspot
94:scholar
445:26 May
168:opaque
164:shadow
96:
89:
82:
75:
67:
497:Stars
351:umbra
276:umbra
272:paene
245:Earth
214:umbra
193:Umbra
152:umbra
101:JSTOR
87:books
447:2019
408:2015
347:ante
341:The
288:NASA
266:The
241:Moon
235:The
226:apex
212:The
158:and
150:The
73:news
290:'s
56:by
557::
438:.
399:.
395:.
232:.
189:.
154:,
461::
449:.
410:.
337:.
263:.
201:.
123:)
117:(
112:)
108:(
98:·
91:·
84:·
77:·
50:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
