How Big are Galaxies? – Galaxy Size Comparison Charts by Astrophysicist Rhys Taylor
Arecibo astrophysicist Rhys Taylor selected 25 galaxies and illustrated the relative sizes beautifully using images made from NASA and ESA observation missions, including a rendering of our own ordinary little Milky Way at the center for comparison.
Also check out a zoomable chart of the giant galaxy IC 1101, the largest known galaxy — created by scaling up an image of M87, another supersized elliptical galaxy that just happens to be considerably closer to our own and has had clearer images taken of it. But the size is right — IC 1101 really is a beastly galaxy, at an estimated 5.5 billion light-years wide, over 50 Milky Ways could fit across it!
There will be a separate embedded post of the zoomable IC 1101 galaxy chart.