I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "Neptune is similar in composition to Uranus, and both have compositions that differ from those of the larger gas giants, Jupiter and Saturn. Like Jupiter and Saturn, Neptune's atmosphere is composed primarily of hydrogen and helium, along with traces of hydrocarbons and possibly nitrogen, but contains a higher proportion of "ices" such as water, ammonia, and methane. However, its interior, like that of Uranus, is primarily composed of ices and rock, and hence Uranus and Neptune are normally considered "ice giants" to emphasise this distinction. Traces of methane in the outermost regions in part account for the planet's blue appearance."? 

What nickname is used for the non-blue planet that has a hydrogen and helium atmosphere like Jupiter and Saturn, but has a different makeup underneath?