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@ SkyLined: I have made a few changes, including a start at inline citations using list-defined references. There's no requirement to stick to the list-defined references—you can mix the technique with in-body refs—but inline citation needs to be used throughout. External links should only be used for things that don't directly support body text.

More importantly, see WP:Close paraphrasing, which states: Close paraphrasing without in-text attribution may constitute plagiarism, and when extensive (with or without in-text attribution) may also violate Wikipedia's copyright policy, which forbids Wikipedia contributors from copying material directly from other sources. Your second sentence is a word-for-word match for text in the NASA article. I haven't looked at the rest of the text in the article for the same problem. ‑‑ Mandruss ( talk) 10:33, 11 October 2014 (UTC) reply

You are of course right... I was in a hurry and was unable to write a proper article and add <ref>'s where needed. I should have known better than to save it in that state. 83.84.60.13 ( talk) 21:41, 11 October 2014 (UTC) (SkyLined, too lazy to log in before) reply