http://news.discovery.com/space/astronomy/revolutionary-new-view-of-baby-planets-forming-around-a-star-141106.htm
An article discussing recent findings of being able to watch as a new solar system is formed. Prior to this, much of planetary formation theory had been speculative. And now here we are, watching applications of g = GM / (R+h)^2 get modeled right before our very eyes!