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Hello Scienceadvocacy, you inserted material at Parker Solar Probe which was removed by Artem.G, then reverted that editor. In you edit summary, "From what i gather the only official source is that article, web pages for public viewing are not official sources or do not mean anything regarding the mission's structure. If you have official sources demonstrating a change in the mission and it's PI's please reference it."
You might have a look at WP:RS regarding Reliable sources. In a nutshell, Reliable sources are websites and publications with a reputation for fact checking and editorial oversight. If you and Artem.G still have a disagreement on content, you can open a discussion on the Parker Solor Probe talk page here: Talk:Parker_Solar_Probe.