When doctors use the term tumor they are talking generically and not about the size of the lesion. A mass usually refers to a lump which is at least 20 mm (0.787 inches) in diameter at its widest point, while a nodule is less than 20 mm at its widest point.
But how big a spiral can you get? Our Milky Way galaxy is pretty beefy, one of the bigger spiral galaxies in the Universe. Itâs roughly 100,000 light-years across, or a quintillion kilometers. Thatâs a lot of kilometers. Donât go bragging to your friends just yet though.
Allrightythen Tim, first of all, you don't even have a picture of our galaxy. Your first pic is M31, the Andromeda galaxy, and your second one is M33, the pinwheel galaxy. They are our nearest large niegbors, and are both part of the Milky way's cluster. Andromeda is bigger than the Milky Way, at 150,000 light years across, and M33 is smaller at I believe 75,000 light years across. Our galaxy is appx. 100,000 light years across. The bright spot at the center of the galaxy is teh galactic bulge, which contains many old, bright stars.