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.
Pain â Pain is the most common symptom when passing a kidney stone. Most commonly, pain only occurs with obstruction, in which the urine cannot pass freely from the kidney to the bladder. Pain can range from a mild and barely noticeable ache to discomfort that is so intense it requires treatment in the hospital.