WRITTEN BY STEPHANIE AZARIA AND SHELLY LEAL Sedna was discovered November 14, 2003, and is currently the most distant body known to orbit our Sun. Sedna is about 1800 km in diameter, which is about one-quarter to three-eighths the size of Pluto. It is at present over 90 Astronomical Units (AU) away from the Sun, 3 times as far as …