Why did Copernicus publish his theory (Heliocentric) on his death bed?

Mid to high level clouds that look like layered blankets are called

How did bacon's rebellion affect relations between colonists and native americans? a. relations improved after many were disgusted by the violence of the rebellion.b. after the rebellion, colonists placed less focus on the "indian problem."c. the rebellion showed many that in order to establish better relations between colonists and native americans,  slavery  had to be legalized.d. more colonists supported an armed expansion into native american territory.

Why did metternich think nationalism threatened the austrian empire?