James is a scientist who is working on finding an answer to a question about solar eclipses; however, he doesn't have enough time or data to test all the possible answers to his question. Based on this, James is using specific studies and calculations in an effort to find answers that are close to, or an approximation of, a correct answer. What are these approximation answers that James is looking for called?
(1 point)
intervals
astrometry
estimation
clusters.