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.
The Milky Way is 100,000 to 120,000 light years in diameter. It is thought to be a barred spiral galaxy. We believe a black hole is at the center, which we call Sagittarius A*. Our solar system is in the Orion arm bar, roughly 27,000LY from the galactic center, which it orbits at more than 800,000km/hr.