Question

which scholar made precise calculations of the earths radius?
al kindi
ibn sina
al biruni
thabit ibn qurra
question 10
2 pts
what was al battanis contribution to astronomy?
discovering the heliocentric model
refining measurements of the solar year and planetary orbits
inventing the telescope
mapping the stars

Explanation:

Al - Biruni made precise calculations of the Earth's radius. Al - Battani refined measurements of the solar year and planetary orbits. The heliocentric model was not discovered by al - Battani. The telescope was not invented by him either, and mapping the stars is not his most well - known contribution.

Answer:

First question: C. al Biruni
Second question: B. Refining measurements of the solar year and planetary orbits