public function getPlanetRatios()
{
$planetRatios = array('Mercury' => 0.382, 'Venus' => 0.949, 'Earth' => 1.0, 'Mars' => 0.532, 'Jupiter' => 11.209, 'Saturn' => 9.449, 'Uranus' => 4.007, 'Neptune' => 3.883);
return DataTable::makeFromIndexedArray($planetRatios);
}