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's the pressure of the blood building up and forcing the brain inward that causes problems and death. It takes from 30 minutes to about 6-8 hours after bang up for symptoms to occur depending on how m much bleeding is taking place.You can do a kinda quickly Nero check on yourself. Get a flashlight and go to the bathroom..Cut out all lights.Shine the light in one eye when you look in the mirror while room is dark.t takes from 30 minutes to about 6-8 hours after bang up for symptoms to occur depending on how m much bleeding is taking place. You can do a kinda quickly Nero check on yourself.