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.
If your blood pressure does not drop after about 15 minutes, the nurse will lower the table and the test will be over. The tilt-table test can last about 90 minutes if you do both parts of it. If you only do the first part, you may be done in 30 to 40 minutes. What happens after a tilt-table test? You may feel tired and a little sick to your stomach right after the test. You may stay in a recovery area for 30 to 60 minutes so nurses can keep track of your blood pressure and heart rate. After recovery, most people can drive home and return to their normal activities.