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At the very center of Neptune is the planetâs core. The core of Neptune is made of iron, nickel and other silicates that make up about 1.2 times the mass of the Earth. We have written many stories about Neptune on Universe Today.Hereâs an article about how there could be oceans inside Neptune.eptune, like the rest of the gas giant planets in the Solar System, can be broken up into various layers. The composition of Neptune changes depending on which of these layers youâre looking at. Letâs see what Neptune is made of.
Scientist used math to find Neptune. They saw neptune up in the sky and couldn't believe it. They did some calculations on where neptune would be an looked again and found out that neptune was right there.They named it Neptune because of the Roman god Neptune.He was the god of the blue seas.eptune was created by many gases that formed into one big planet. They say Neptune was also created by the big bang theory. The gases are called hydrogen, helium, water, and â¦ ammonia. Improvement: Just to clarify-the gases actually formed into one big planet as a result of the Big Bang Theory.