The galaxy NGC 2273 consists of a spiral within a spiral as shown in this Hubble Space Telescope image. NGC 2273 is about as big and as massive as our own home galaxy, the Milky Way. It has a small, tight spiral in its middle, with a wider spiral around it. A supermassive black hole lies at the center of the inner ring. [ESA-Hubble/NASA/J. Greene]
Find out more in our radio program entitled NGC 2273.