Stellarium

Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows and MacOSX. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.

stellarium.org

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87 Languages
Ukrainian	100%
Galician	100%
Slovak	100%
Spanish	100%
Russian	98%
German	97%
Chinese (China)	93%
Arabic	93%
Chinese (Taiwan)	92%
Dutch	91%
Italian	88%
Croatian	86%
Chinese (Hong Kong)	84%
Catalan	84%
Japanese	83%
Sardinian	81%
French	77%
Catalan (Valencian)	73%
Czech	62%
Turkish	60%
English (United Kingdom)	56%
English (United States)	56%
Hungarian	54%
Korean	47%
Telugu	36%
Bulgarian	35%
Bengali	34%
Belarusian	28%
Swedish	27%
Finnish	27%
Polish	16%
Portuguese (Brazil)	16%
Thai	16%
Gaelic, Scottish	15%
Portuguese	12%
Indonesian	12%
Romanian	11%
Albanian	11%
Hebrew	11%
Vietnamese	10%
Icelandic	10%
Slovenian	9%
Serbian	9%
English (Canada)	9%
Norwegian Bokmål	8%
Malay	7%
Estonian	7%
Latin	7%
Persian	7%
Greek	6%
Basque	5%
Danish	4%
Azerbaijani	4%
Afrikaans	3%
Bosnian	3%
Sinhala	3%
Breton	3%
Marathi	2%
English (Australia)	2%
Armenian	2%
Malayalam	2%
Latvian	2%
Tamil	2%
Gujarati	2%
Nepali	1%
Hindi	1%
Javanese	1%
Luxembourgish	1%
Esperanto	0%
Georgian	0%
Low German	0%
Mongolian	0%
Spanish (Latin America)	0%
Western Frisian	0%
Urdu	0%
Swahili	0%
Amharic	0%
Zulu	0%
Central Atlas Tamazight	0%
Montenegrin	0%
Kurdish	0%
Kannada	0%
Spanish (Argentina)	0%
Uzbek	0%
Spanish (Chile)	0%
Uzbek (Latin)	0%
Serbian (Latin)	0%