text: I don't think that the Earth is as small compared to the sun as a golf ball compared to the Earth itself. \n\nI would say a Red Supergiant, one like Antares, the alpha star in Scorpius, would be much like the Earth when the Earth is compared to a golf ball.\n\nNew!:\nI just received the information from Wikipedia.com and I did some calculations. \nthe diameter of a golf ball is about 0.00004 km, \nthe diameter of our Earth is about 12756 km,\nand the diamter of Antares is about 924000000 km. \n\nSince calculating the volume requires us to cube the radius (let us ignore the pi and 4/3 for simplicity's sake since in ratio, they don't matter). So:\nthe cube of the radius of the golf ball is 8 x 10^(-15) km cubed,\nthe cube of the radius of our Earth is 2.6 x 10^(11) km cubed,\nand the cube of the radius of Antares is 9.9 x 10^(25) km cubed. \n\nWe can get a brief idea of their sizes by comparing the powers of 10: \n\ngolf ball -> Earth is\n1 -> 100000000000000000000000000\nEarth -> Antares is\n1 -> 100000000000000\n\nSo Earth is far bigger than a golf ball than Antares is than Earth (at least from my calculations). \n\nNow, returning to the questions, I would say something 1000000000000 times the size of Antares, probably a nebula.