The red, white, and blue-colored stripes on the barbershop pole are actually a vestige from an era when barbershops were used for bloodletting? Bloodletting was a medical procedure from the Middle Ages that involved cutting one’s veins open and letting blood drain away in the hopes of curing a wide variety of maladies. The procedure was originally performed by monks, but after the church stopped them, people had to turn to barbers. Barbershops were essentially outpatient clinics. They used to cut hair, do some bloodletting, set broken bones, and pull bad teeth.
The red color on the barber pole represents the blood, while the white color represents the bandages. The pole itself represents a special stick that people would hold onto during the bloodletting procedure.
Later, in America, after much of the bloodletting tradition was forgotten, the blue stripe was added to the barber shop pole to match the American flag.
Explanation: Normally faint and elusive, the Jellyfish Nebula is caught in this alluring telescopic field of view. Floating in the interstellar sea, the nebula is anchored right and left by two bright stars, Mu and Eta Geminorum, at the foot of the celestial twins. The Jellyfish Nebula itself is right of center, seen as a brighter arcing ridge of emission with dangling tentacles. In fact, this cosmic jellyfish is part of bubble-shaped supernova remnant IC 443, the expanding debris cloud from a massive star that exploded. Light from the explosion first reached planet Earth over 30,000 years ago. Like its cousin in astrophysical waters the Crab Nebula supernova remnant, the Jellyfish Nebula is known to harbor a neutron star, the ultradense remnant of the collapsed stellar core. An emission nebula cataloged as Sharpless 249 fills the field at the upper left. The Jellyfish Nebula is about 5,000 light-years away. At that distance, this image would be about 300 light-years across.