Over the weekend, Canon Copernicus’ recently rediscovered remains (found in their honorable, but as usual for people not paying for conspicuousness, unmarked grave under the floor of the cathedral where he served) were moved to a new tomb in the cathedral, as is suitable to his posthumous fame. The AP freaks out.
Putting a book on the Index was not the same as declaring it heretical. It was a sort of product safety label, telling people not to trust the book without any reservations. Serious students could read them, although in religious orders, they had to get permission from superiors. (But then, in religious orders, you sign up for that obedience stuff.) Books got put on the Index for various reasons, mostly moral and not doctrinal. It didn’t happen to every book with objectionable features; it was about a book being influential but misleading.
In the case of Copernicus’ book, apparently several decades after his death it was put on the Index temporarily, until various religious statements made in the book could be “corrected”. (This being the Vatican, this took several centuries.) The information in the book was not itself forbidden, and by that time there were many other physics books passing the info along about Copernican heliocentrism.
So no, Copernicus wasn’t in an unmarked grave of disgrace and horror. If they’d thought he was a heretic, they wouldn’t have buried him in consecrated ground, much less in the beating heart of the diocese. They just buried him like any normal canon of the cathedral, as was apparently his wish; and now they’ve reburied him like a famous man of achievement, which is what posterity has decided is fitting and he doesn’t get to argue with. 🙂