1 Eris is the most massive dwarf planet in the Solar System, exceeding Plutoâs mass by 28%. As such, it was a serious contender to be a tenth planet but failed to meet the criteria set out by the International Astronomical Union in 2006.  Eris was named after the Greek goddess of discord.
According to the American Urological Association, the time to pass stones located in ureters -- tubes leading from the kidneys to the bladder -- is an average of 8 days for stones less than 2 mm, 12 days for stones between 2 and 4 mm and 22 days for stones between 4 and 6 mm.
Stones between 2 to 4 mm take 12 days while 4-6 mm stones take about 22 days to pass out of the body. Kidney stones take about 40 days to pass out on its own without any medication of other intervention. Antispasmodics are usually prescribed to relax the ureter and ease the passage of kidney stones. When on antispasmodic, it may take about 5 to 7 days to pass out the kidney stone. If the kidney stone does not pass out on its own within 2 months, other medical intervention are considered.