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.
How long does it take me to recover following a gastroscopy? The recovery time is about 20-45 minutes depending on how quickly your body gets rid of the sedatives. You will be monitored until you are fully alert and are able to tolerate something to drink. Most people feel perfectly fine by the time they leave, however, however you may remain a bit drowsy for the next 4-6 hours.