Deducing Gravity
Creation Theory Predictive Testable Hypothesis 21
And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so.
( Genesis 1:7 ) KJV
We use the change from formless to formed, the appearance of the orientation under and above, and the analogy of a drawing compass having a focus and circumference to deduce that gravity was created on the 2nd day.
Principia Mattymatica 