WikiProject Spaceflight's Clean-Up Listing organizes Spaceflight articles which have various clean-up tags on them.
Articles which have no clean-up tags: 73.3% complete
2 May 2023 Cleanup Report. Six months into cleanup effort. 1,040 total articles cleaned and 1,774 issues resolved. More than 24% reduction in issues from start in early November 2022. Continued focus on issue resolution especially with articles needing citations, BLPs, and dead citation/external link correction. SpaceHist65 (talk) 00:29, 3 May 2023 (UTC)[reply]
Templates have tracking categories that can be used to check if there are odd or invalid inputs and quickly evaluate them. Invalid inputs will not be displayed by the infobox and should be corrected or removed. The tracking categories are updated monthly. There are templates associated with spaceflight that can be checked, but some of the most popular are: