4×6 inches – In clear protective reusable sleeve 

Enjoy a 3D image of Ring Nebula also known as Messier 57, M57 or NGC 6720. 
The Ring Nebula is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through the last stage in its evolution before becoming a white dwarf. 

Card back contains lines for mailing address  

Ideal as a postcard or give as a greeting card