tia Burney an eleven year old schoolgirl from Oxford, England.</p>
    <h2>Pluto was reclassified from a planet to a dwarf planet in 2006.</h2>
    <p>This is when the IAU formalised the definition of a planet as “A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.”</p>
    <h2>Pluto was discove