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.
For comparison, the Milky Way is believed to contain a mere 100 billion stars (thatâs a lot, but not compared to a trillion). This brings us to the main point of this article â IC 1101. IC 1101 is the single largest galaxy that has ever been found in the observable universe.