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.
This is a room fitted with X-ray equipment to allow the doctor to monitor the procedure on a screen. A coronary angioplasty usually takes between 30 minutes and two hours, although it can take longer. You'll be asked to lie on your back on an X-ray table. You'll be linked up to a heart monitor and given a local anaesthetic to numb your skin.