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Neptune is spinning, and that makes the equator bulge a little bit, so the diameter at the equator is larger than its diameter at the poles. The diameter at Neptune's equator is 49,528 ± 30 km (30,775 miles) and the diameter atNeptune's poles is 48,642 ± 60 km (30,250 miles). Neptune is about 3.8 times the diameter of Earth.

Planet Diameter in kilometers

Mercury------------ 4,880

Venus -------------12,104

Earth --------------12,756

Mars ----------------6,794

Jupiter -----------142,984

Saturn -----------120,536

Uranus ------------51,118

Neptune -----------49,532

(Dwarf Planet Pluto --2,274) The diameter of Neptune at its equator is 30,599 miles, or 49,244 kilometers. Neptune is one of the gas giants in the Solar System. The diameter of Neptune is 49,532

AnswerNeptune's diameter is approximately 49,530 kilometers (30,789 miles). Here are all diameters of the planets. Pluto is no planet anymore. Mercury 4,880 km

Venus 12,104 km

Earth 12,756 km

Mars 6,794 km

Jupiter 142,984 km

Saturn 120,536 km

Uranus 51,118 km

Neptune 49,532 km Look for yourself. The diameter of Neptune is 30,599 miles. This is 49,244 kilometers. Neptune is a blue gas giant and the eighth planet from the Sun.

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8y ago
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13y ago

The surface area of Neptune is 7.64 x 109 km2, but it is not solid.

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11y ago

The diameter of Neptune is 30,200 miles.

The circumference of Neptune is 3.14 X 30,200 = which is 94,828.0.

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12y ago

Neptune is a 3-D figure, it doesn't have a perimeter, it has a surface area.

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13y ago

I have no idea i thought you new

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Q: What is the diamiter of Neptune?
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