Science Question Of The Week:

 Recently the IAU (International Astronomical Union) declared Pluto a 'dwarf planet'.  As a result, the count of 'official' planets in our solar system is now down to 8 instead of 9.  There are now 3 dwarf planets in our solar system along with Pluto.  Name these three planets as well as the source of your information.  Good luck!  Your answer is due to Mrs. Perez's orange folder by Friday.