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.
Surgery is often not necessary because most kidney stones can pass through the urinary tract with plenty of water, usually 2 to 3 quarts per day. A person susceptible to stone formation should try to drink enough fluids throughout the day to produce at least 2 quarts of urine in every 24-hour period.