Eris' size resulted in its discoverers and NASA labelling it the solar system's tenth planet. This, along with the prospect of other similarly sized objects being discovered in the future, stimulated the International Astronomical Union (IAU) to define the term planet more precisely. Under a new definition approved on August 24, 2006, Eris was designated a dwarf planet along with Pluto and Ceres.
Best Answer: it depends on a few things~...but the longest time a human can stay upside down is 2 days.. If your heart is reasonably healthy and you aren't restricted, then you shouldn't pass out at all, any more than you would laying down or standing up.
Time for Food to Exit the Bowels The time it takes for food to travel from the mouth, be digested and passed out as a waste (feces) is known as the bowel transit time. This can vary from person to person but it is within 12 to 48 hours. It can be, however, take as long as 72 hours.