whose heliocentric model and Cedar the first step in the development of modern models of the solar system

Why is ivan iv known as “ivan the terrible”?

Which statement best summarizes the content of the speech that victor gives walton’s crew when they want to return home he criticizes them for being cowardly and disrespectful to their captain’s dreams.

Whose plan centered on keeping the federal budget balanced, instituting tax cuts, and developing public works projects?