Ok, let's back up here. If you are asserting that numbers printed in a book are not evidence, then I firmly reject your statement elsewhere that medical data you provided is solid evidence that phosphorus is a legitimate medical treatment for specific diseases. That's literally all that was.
On another note, I can show you plenty of textbooks from my college years as I studied to become a mechanical engineer that had plenty of tables of data on such things as youngs modulus, density of metals, tensile strengths, ultimate yield strength, cyclical fatigue. If the astronomy texts that he is referring to is anything similar to my engineering textbooks, I bet you that there are explanations, examples, and equations that show how those numbers were calculated and demonstrated in real life experiments.