Question

How did the church react to many new scientific breakthroughs during the Renaissance

they promoted these new ideas

they tried to stop them from spreading

Answer 1

Short answer: both. The Church’s response was mixed — sometimes it promoted and sponsored scientific work, and sometimes it censored or punished ideas that it judged to threaten doctrine or ecclesiastical authority.

Why both happened (and examples)

- Promotion and support
- Universities and cathedral schools were primary sites for scientific learning (natural philosophy, medicine, astronomy).
- Many scientists were clergy or worked in Church institutions (e.g., Nicolaus Copernicus was a canon; many Jesuits taught and advanced astronomy and mathematics).
- The Church sponsored practical projects that required scientific knowledge — for example, the Gregorian calendar reform (1582) was a papal initiative based on astronomical expertise.
- Religious patrons (popes, bishops) funded artists, anatomists, instrument makers and observatories.

- Resistance and suppression
- When theories appeared to contradict scripture or undermine Church authority, authorities sometimes acted to stop them spreading. Examples:
- 1616: the Church formally warned that heliocentrism “formally heretical” (as appearing to contradict Scripture).
- 1633: Galileo was tried by the Roman Inquisition, forced to recant, and placed under house arrest for advocating heliocentrism.
- Books were placed on the Index of Forbidden Books; local and ecclesiastical censors controlled publication.
- Giordano Bruno was executed in 1600 — his case combined theological heterodoxy and philosophical ideas (not a straightforward “science” prosecution, but often cited).

Why reactions varied
- The Church was not a single monolithic actor: local bishops, universities, popes, religious orders and political authorities had different priorities.
- The crucial factor was perceived conflict with scripture or Church authority, not science per se. Much scientific work was seen as harmless or useful; ideas that implied a challenge to foundational interpretations of Scripture or ecclesiastical power faced suppression.
- Personal, political and social contexts (patronage, rivalries, the Reformation/Counter-Reformation environment) also shaped responses.

Conclusion
The Renaissance Church both fostered and constrained scientific developments. It helped sustain learning and practical science in many ways, but it also sought to limit ideas it judged dangerous — so neither of your two options alone tells the whole story.