APOD 1.1

http://apod.nasa.gov/apod/ap100822.html

Hoag's Object

Arthur Hoag, also noted for his work in photoelectric and photographic photometry (using the flux of an object to measure its properties), discovered Hoag's Object in 1950 by chance. The outside ring has newer blue stars and the inside contains older red stars. The way these ring galaxy shapes are formed is when a smaller galaxy ("intruder galaxy") passes through a larger galaxy; which I now really desire to see happening because that sounds pretty intense. Hoang's object lies near Serpens (near = 600 million light years).