Talaksan:Janus_-_Voyager_2.jpg
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Janus_-_Voyager_2.jpg ((250 × 250 pixel, laki ng talaksan: 8 KB, uri ng MIME: image/jpeg))
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Ito ay isang talaksan mula sa Wikimedia Commons. Makikita sa ibaba ang impormasyon mula sa pahina ng paglalarawan nito roon. |
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PaglalarawanJanus - Voyager 2.jpg |
English: This is a colorized version of the high-resolution Voyager 2 spacecraft image of Janus that was taken on 25 August 1981. Janus was discovered by Audouin Dollfus in 1966 and was named after the god of gates and doorways. It is depicted with two faces looking in opposite directions. Janus has an irregular shape with a size of 196x192x150 kilometers (122x119x93 miles) in diameter. It is heavily cratered with several craters 30 kilometers (19 miles) in diameter. The pervasive cratering indicates that its surface must be several billion years old.
Janus and Epimetheus share the same orbit of 151,472 kilometers (94,125 miles) from Saturn's center or 91,000 kilometers (56,547 miles) above the cloud tops. They are only separated by about 50 kilometers (31 miles). As these two satellites approach each other they exchange a little momentum and trade orbits; the inner satellite becomes the outer and the outer moves to the inner position. This exchange happens about once every four years. Janus and Epimetheus may have formed from a disruption of a single parent to form co-orbital satellites. If this is the case, the disruption must have happened early in the history of the satellite system. |
Petsa | |
Pinanggalingan | http://solarviews.com/cap/sat/janus5.htm (image link) |
May-akda | NASA (Voyager 2 mission)/Calvin J. Hamilton |
Paglilisensiya
Public domainPublic domainfalsefalse |
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ![]() |
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Tala ng orihinal na pagkarga
(All user names refer to it.wikipedia)
- 2006-09-22 20:36 Alessio Rolleri 250×250×8 (7713 bytes) Giano ripreso dalla sonda Voyager 2 Fonte: http://solarsystem.nasa.gov/planets/images/inset-sat_janus-large.gif {{PD-NASA}}
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depicts English
25 Agosto 1981
media type English
image/jpeg
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Araw/Oras | Thumbnail | Mga dimensiyon | tagagamit | Kumento | |
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ngayon | 22:41, 21 Hulyo 2019 | ![]() | 250 × 250 (8 KB) | BevinKacon | Reverted to version as of 11:02, 15 November 2007 (UTC) no improvements since original upload |
08:51, 5 Mayo 2015 | ![]() | 248 × 253 (14 KB) | Jcpag2012 | larger, re-cropped | |
06:31, 29 Marso 2015 | ![]() | 250 × 250 (8 KB) | Jcpag2012 | Reverted to version as of 11:02, 15 November 2007 | |
02:27, 26 Marso 2015 | ![]() | 250 × 250 (8 KB) | Huntster | Reverted to version as of 11:02, 15 November 2007; unnecessary and inappropriate upsampling. | |
08:30, 24 Pebrero 2015 | ![]() | 1,000 × 1,072 (319 KB) | Jcpag2012 | processing with Paint.NET | |
11:02, 15 Nobyembre 2007 | ![]() | 250 × 250 (8 KB) | File Upload Bot (Magnus Manske) | {{BotMoveToCommons|it.wikipedia}} {{Information |Description={{it|Giano ripreso dalla sonda Voyager 2 Fonte: http://solarsystem.nasa.gov/planets/images/inset-sat_janus-large.gif}} |Source=Originally from [http://it.wikipedia.org it.wikipedia]; descripti |
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