InSight costs by fiscal year, U.S. contributions only. The project entered formulation in September of 2012. Technical issues with one its instruments delayed InSight's launch from 2016 to 2018. After launch in May of 2018, the InSight project moved from development to its operational phase. Source: Planetary Science Budget Dataset, compiled by Casey Dreier for The Planetary Society (accessible on Google Sheets or downloadable as an Excel file).