- The Ring Nebula (also catalogued as Messier 57, M57 and NGC 6720) is a planetary nebula in the northern constellation of Lyra. Such a nebula is formed when a star, during the last stages of its evolution before becoming a white dwarf, expels a vast luminous envelope of ionized gas into the surrounding interstellar space.
- Minnesota State Fair, 1917 (MNopedia)
Since its founding in 1859, the Minnesota State Fair had been an essential yearly tradition in the agricultural state. However, after the United States entered World War I in 1917, the fair took on an entirely new significance. Organizers reframed the event as a “Food Training Camp” that showed Minnesotans how to produce and conserve resources vital to the Allied war effort.