Gravity (And the Solar System) Visualized With Spandex and Marbles [Science Video] Wow. Just wow. I especially liked the part where the professor was able to have one marble orbit the other while the first was orbiting the weight located in the center of the sheet of spandex. [apbiolghs | Via] Sharing is Caring:FacebookTwitterEmailMorePinterestMastodon Geeks are Sexy needs YOUR help. Learn more about how YOU can support us here.