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@91.124.117.29: concerning your edits: the navboxes are ordered in alphabetical order. The Contribution to ARIEL Spectroscopy of Exoplanets (CASE) study, part of the Explorer program, is NASA's contribution to ARIEL, and can be seen in the navbox itself under the "MO" subgroup. Last but not lease, ARIEL is no longer a "proposed mission". It is a mission selected, funded, and due for launch. – PhilipTerryGraham (talk·articles·reviews) 00:12, 27 March 2018 (UTC)[reply]
If the CASE (Contribution to ARIEL Spectroscopy of Exoplanets) instrument is a NASA contribution to the mission, it would be most informative that it is mentioned in the article, in order to explain and justify the link to Explorer program projects. Cheers, BatteryIncluded (talk) 22:37, 27 April 2018 (UTC)[reply]