Cat
The domestic cat scores exceptionally well on accessibility metrics. Cats are available for adoption at shelters worldwide, purchasable from breeders, or simply acquirable through the phenomenon of the cat choosing to move in uninvited. Once obtained, a cat remains accessible continuously—positioned on furniture, underfoot in corridors, or inexplicably inside cupboards one does not recall opening. The cat provides 24/7 availability within the domestic environment, requiring only that one exists in a space the cat has decided to occupy.
Aurora Borealis
Aurora accessibility presents considerably greater logistical challenges. Reliable viewing requires travel to locations such as northern Norway, Iceland, northern Canada, or Alaska—regions where winter temperatures routinely descend below minus twenty degrees Celsius. Even upon arrival at appropriate latitudes, viewing success depends upon solar activity levels, geomagnetic conditions, cloud cover, and sheer fortune. Many aurora tourists return home having seen only clouds and their own disappointment. The phenomenon operates entirely without regard for human scheduling preferences or holiday booking windows.