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A size comparison of Neptune and Earth. Neptune's mass of 1.0243 × 10 26 kg [8] is intermediate between Earth and the larger gas giants: it is 17 times that of Earth but just 1/19th that of Jupiter. [g] Its gravity at 1 bar is 11.15 m/s 2, 1.14 times the surface gravity of Earth, [71] and surpassed only by Jupiter. [72]
The Great Dark Spot was captured by NASA's Voyager 2 space probe in Neptune's southern hemisphere. The dark, elliptically shaped spot (with initial dimensions of 13,000 × 6,600 km, or 8,100 × 4,100 mi), was about the same size as Earth, and was similar in general appearance to Jupiter's Great Red Spot.
Under perfect dark sky conditions Neptune may be visible to the Naked eye only if Neptune is at its maximum brightness (magnitude +7.8). The Sun and the Moon—the remaining noticeable naked-eye objects of the solar system—are sometimes added to make seven "planets".
Neptune was discovered in 1846 and is located 30 times farther from the sun than Earth. The planet's 164-year orbit takes it through some of the darkest and most remote regions of the outer solar ...
Features could previously only be seen by sending spacecraft to planet
planet Neptune: seen from Earth maximum brightness [42] (Neptune comes to perihelion in 2042) +7.78: planet Neptune: seen from Earth mean brightness [42] +8.00: planet Neptune: seen from Earth minimum brightness [42] +8: Extreme naked-eye limit, Class 1 on Bortle scale, the darkest skies available on Earth. [58] +8.10: moon Titan: seen from Earth
Neptune is too dim to be visible to the naked eye: its apparent magnitude is never brighter than 7.7. [5] ... (13.4′) main tube at the same rate as Earth's rotation.
For the first time since 2022, a total lunar eclipse will cause the moon to turn red as it passes through the Earth's shadow. Unlike a total solar eclipse that is visible from only a small area ...