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.
A answered. As anyone whoâs passed a kidney stone knows, it can be a very painful experience, depending on the size. If the stone is small â less than 5 mm â and not causing any pain, there is a good chance that it will pass on its own after it falls into the ureter. Such stones may be followed with watchful waiting.