Slika:Janus - Voyager 2.jpg

Višja ločljivost ni na voljo.

Janus_-_Voyager_2.jpg (250 × 250 točk, velikost datoteke: 8 KB, MIME-vrsta: image/jpeg)

Logotip Zbirke

Datoteka je shranjena v Wikimedijini zbirki prostega slikovnega, zvočnega ter videogradiva.
Spodaj prikazane informacije so s tamkajšnje opisne strani.

Povzetek

OpisJanus - 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.
Datum	25. avgust 1981
Vir	http://solarviews.com/cap/sat/janus5.htm (image link)
Avtor	NASA (Voyager 2 mission)/Calvin J. Hamilton

Licenca

	Ta datoteka je v javni domeni, ker jo je izdelala izključno NASA. Avtorskopravna politika NASE pravi, da »gradivo NASE ni avtorskopravno varovano, razen če je navedeno drugače.« (glejte Template:PD-USGov, stran z avtorskopravno politiko NASE ali politiko uporabe slik JPL.)
	Opozorila: Uporaba logotipov NASE, njenih insignij in emblemov je omejena z ameriškim zakonom 14 CFR 1221. Spletno mesto NASE gosti številne slike sovjetske/ruske vesoljske agencije in drugih neameriških vesoljskih agencij. Te niso nujno v javni domeni. Gradivo, ki temelji na podatkih vesoljskega teleskopa Hubble, je lahko avtorskopravno varovano, če ni izrecno delo inštituta STScI.[1] Glejte tudi {{PD-Hubble}} in {{Cc-Hubble}}. Vse gradivo skupnega projekta ESE in NASE SOHO je avtorskopravno varovano in je za njegovo neizobraževalno naravo v pridobitni namen potrebno dovoljenje.[2] Slike na spletnem portalu Astronomy Picture of the Day (APOD) so morda avtorskopravno varovane.[3] Nacionalni center vesoljskih znanstvenih podatkov (NSSDC) gosti tudi avtorskopravno varovano vsebino. V pogostih vprašanjih njegove galerije fotografij je navedeno, da so v javni domeni vse slike fotogalerije, »razen če je navedeno drugače«.

Izvorni dnevniški zapis naložitve

(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}}

Zgodovina datoteke

Kliknite datum in čas za ogled datoteke, ki je bila takrat naložena.

	Datum in čas	Velikost	Uporabnik	Komentar
trenutno	23:41, 21. julij 2019	250 × 250 (8 KB)	BevinKacon	Reverted to version as of 11:02, 15 November 2007 (UTC) no improvements since original upload
	09:51, 5. maj 2015	248 × 253 (14 KB)	Jcpag2012	larger, re-cropped
	07:31, 29. marec 2015	250 × 250 (8 KB)	Jcpag2012	Reverted to version as of 11:02, 15 November 2007
	03:27, 26. marec 2015	250 × 250 (8 KB)	Huntster	Reverted to version as of 11:02, 15 November 2007; unnecessary and inappropriate upsampling.
	09:30, 24. februar 2015	1.000 × 1.072 (319 KB)	Jcpag2012	processing with Paint.NET
	12:02, 15. november 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