The Hubble Space Telescope image on the front of this lithograph shows two galaxies. The edge-on galaxy on the left is called NGC 4302, and the slanted galaxy on the right is NGC 4298. Both galaxies are spiral galaxies that appear different because they are tilted at contrasting angles as viewed from Earth.
Despite appearances, these galaxies are similar in terms of structure, contents, and distance from Earth. A telltale, pinwheel-like structure is visible in NGC 4298. In contrast, the edge-on portrait of NGC 4302 hides the view of any pinwheel-shaped structure within its disk. Instead, it highlights the thin extent of the disk.
HubbleSite press release: "A New Angle on Two Spiral Galaxies for Hubble's 27th Birthday"
HubbleSite video: "Perspectives on Spiral Galaxies"
Amazing Space resources by topic: Galaxies