how high from neptunes crust is the atmosphere?

Answer 1

I have read that the gaseous planets don't have a rocky core like the inner planets Mercury, Venus, Earth, & Mars. What scientists theorize is that they have a slushy sphere of ammonia, iron, and a number of elements that may be larger than our planet. But as the first answer correctly states is that there is no known boundary or crust to make an accurate measurement from for now.

Answer 2

Neptune's core is about 13,000 degrees F, and it's made of gases and trace amounts of rock, so there's no way to measure the radial difference of the atmosphere.