Portal:Astronomia/Artykuł miesiąca 12 2009
Planeta Neptun
Neptun – ósma, najdalsza planeta od Słońca w Układzie Słonecznym. Zajmuje czwarte miejsce – mierząc według średnicy i trzecie miejsce według masy. Jej jasność nie przekracza 7,6m. Neptun jest 17 razy masywniejszy od Ziemi i trochę masywniejszy od swojego bliźniaka Urana, który ma masę 15 razy większą od Ziemi i mniejszą gęstość. Planeta nosi nazwę po rzymskim bogu morza. Jej symbol astronomiczny to 
, stylizowana wersja trójzębu Neptuna.
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Neptune Full.jpg
This picture of Neptune was produced from the last whole planet images taken through the green and orange filters on the Voyager 2 narrow angle camera. The images were taken at a range of 4.4 million miles from the planet, 4 days and 20 hours before closest approach in August 1989.The picture shows the Great Dark Spot and its companion bright smudge; on the west limb the fast moving bright feature called Scooter and the little dark spot are visible. These clouds were seen to persist for as long as Voyager's cameras could resolve them. North of these, a bright cloud band similar to the south polar streak may be seen.
This picture of Neptune was produced from the last whole planet images taken through the green and orange filters on the Voyager 2 narrow angle camera. The images were taken at a range of 4.4 million miles from the planet, 4 days and 20 hours before closest approach in August 1989.The picture shows the Great Dark Spot and its companion bright smudge; on the west limb the fast moving bright feature called Scooter and the little dark spot are visible. These clouds were seen to persist for as long as Voyager's cameras could resolve them. North of these, a bright cloud band similar to the south polar streak may be seen.
Neptune symbol.svg
Astronomical and astrological symbol for the planet Neptune. Also at Unicode U+2646 which renders as ♆.
Astronomical and astrological symbol for the planet Neptune. Also at Unicode U+2646 which renders as ♆.