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by karisalomon
Last updated 5 years ago


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Fun Facts• It was discovered on September 23, 1846, just hours after Uranus was discovered.• The average surface temperature is -200°C (-328°F) Brrr!!!• Its axial tilt is very similer to Earth’s at 28°.• It is about 4.5 billion years old. That’s about the same age as the Sun!• Every once in a while, it crosses orbit paths with Pluto.• Methane in the atmosphere creates Neptune’s blue color.• Neptune has a faint system of rings.

• 8th planet from the Sun• 4,504,000,000 km (2,799,000,000 mi) away from the Sun• Composition: Core made of liquid rock; oceans on the surface made of hydrogen, helium, water, ammonia, and methane• Length of day: Approximately 16 Earth hours• Length of year: 59,000 Earth days OR about 165 Earth years• On Neptune, a 20 lb. bookbag would weigh: 22.6 lbs.

Great Dark Spot

Basic Info


The Great Dark Spot• Not unlike Jupiter’s Great Red spot, the Great Dark Spot on Neptune is guessed to be a colossal storm system in the atmosphere.• It appears as a depression in the atmosphere surrounded by high cirrus clouds.• Scientists hypothesize that it isn’t stable. In fact, a few years after it was discovered, it temporarily disappeared!• The Great Dark Spot doesn’t move with Neptune. It in fact moves in the opposite direction at speeds up to 10 times the average hurricane speeds on Earth!

More Info

LegendNeptune is named after the Roman god of the sea (a.k.a. Poseidon in Greek mythology). It was probably named for the planets deep blue color, wihich is similar to the color of the oceans.

Neptune (Poseidon)


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