I recently came back to Neopets after 10 years away, and wondered why I didn't have the Royal Astronomer trophy because I remembered participating in the Altador plot. Turns out I only filled out two constellations, so I'm currently trying to complete the whole thing and I'm stuck on The Farmer constellation.
I'm having the same issue that a bunch of other people did. My coordinates are correct and I've done all the necessary steps in the plot, but it's telling me that my stars don't match.