Edit the talk page, change the class= and importance= parameters to the appropriate ratings or add |class= and |importance=, if not already present and save the page.

See above for available ratings. Please leave comments about how to improve the article on the talk page once you've rated the article.

... that isn't

Edit the talk page, add {{WikiProject Astronomy|class=|importance=}} and change the class and importance parameters as appropriate before saving the page.

See above for available ratings. Please leave comments about how to improve the article on the talk page once you've rated the article.

Agree that the stub rating is appropriate where the page was auto-tagged

Remove the |auto=yes parameter from within {{WikiProject Astronomy}}, such that the rating reads {{WikiProject Astronomy|class=Stub}}.