Talk page required as article is a proposed very good article. LIAM / LIAMmailbox 21:58, 1 November 2007 (UTC)
This article is good for regular English Wikipedia, but for Simple, its too advanced in level. For blue tag, we might want to you easier language, so, everybody can understand.--FreewayguyCall?Fish 19:52, 1 August 2008 (UTC)
Neptune's atmosphere (a layer of gas floating above planets) is mostly made up of hydrogen and helium (two types of gases), with small amounts of methane which is makes the planet blue. - Too long and the end of the sentence sounds odd.