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.
It left me feeling as light as if I had eaten a crisp salad that afternoon! So if you feel like youâre going to doze off after a big meal, try lying on your left side for 10 minutes and see if you feel more energized and alert (and perhaps your stomach even will sound less like World War III).