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.
In her book, Miranda discusses: 1  How correcting our posture can make us look like weâve lost 10 pounds and 10 years in just 10 seconds. 2  How to prevent muscle atrophy and cell deathâand jumpstart weight lossâin only 30 minutes a day.  How to live in a pain-free body no matter what your age.