A billion is three groups of three zeroes. So for visualizing I would think of a cubic meter compared to a cubic millimeter. A grain of sand serves for a cubi

A billion is three groups of three zeroes. So for visualizing I would think of a cubic meter compared to a cubic millimeter. A grain of sand serves for a cubic millimeter. For the cubic meter you can either visualize a cube that size, or four oil drums, or a small hot tub. Now for the 30 out front, That’s about 27 which is 3^3 so let’s just size a smaller grain of sand which is only 1/3mm on a side. Maybe table salt would be good. So a grain of table salt in a small hot tub. If you perform this thought experiment with actual solar masses, use sufficiently long tongs and wear eye protection.