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John Herschel almost discovered Neptune the same way his father, William Herschel, had discovered Uranus in 1781: by chance observation. In an 1846 letter to Wilhelm Struve, John Herschel states that he observed Neptune during a sweep of the sky on July 14, 1830. Although his telescope was powerful enough to resolve Neptune into a small blue ...
Johann Gottfried Galle, 1880 Memorial plaque in Wittenberg. Johann Gottfried Galle (9 June 1812 – 10 July 1910) was a German astronomer from Radis, Germany, at the Berlin Observatory who, on 23 September 1846, with the assistance of student Heinrich Louis d'Arrest, was the first person to view the planet Neptune and know what he was looking at.
The Planet Neptune: An Historical Survey before Voyager. Praxis. Sampson, R.A. (1904). "A description of Adams's manuscripts on the perturbations of Uranus". Memoirs of the Royal Astronomical Society. 54: 143– 161. Bibcode:1904MmRAS..54..143S. "John Couch Adams and the discovery of Neptune". Occasional Notes of the Royal Astronomical Society.
1846 – Johann Galle discovers the eighth planet, Neptune, following the predicted position gave to him by Le Verrier. [137] 1846 – William Lassell discovers Neptune's moon Triton, just seventeen days later of planet's discovery. [140] 1848 – Lassell, William Cranch Bond and George Phillips Bond discover Saturn's moon Hyperion. [141] [142]
Image credits: Mexiart "Photographing the night sky is not as easy as one might think. To take quality photos of the night sky, you really need a tripod to steady your camera.
Generally, Neptune is depicted as a rich, deep blue. Uranus is usually seen as a pale green or cyan. In fact, however, they are much more similar than we thought.
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Neptune's second-known satellite (by order of discovery), the irregular moon Nereid, has one of the most eccentric orbits of any satellite in the Solar System. The eccentricity of 0.7512 gives it an apoapsis that is seven times its periapsis distance from Neptune. [j] From July to September 1989, Voyager 2 discovered six moons of Neptune. [162]