Who developed the geocentric theory

Ptolemy, is the right answer.

Explanation:

The most extremely advanced geocentric model was developed by Ptolemy of Alexandria. This model was followed until the 16th century and after that, the heliocentric models of Nicolaus Copernicus superseded this model. Ptolemy believed that the celestial bodies' circular movements were generated by their being connected to invisible turning solid orbs.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.