Christian Brothers, De La Salle Fifth Reader
“ Mars has two, and Jupiter has four, but we can see them only when we look through a telescope." replied Frank."Are all the twinkling stars which one sees on a fine clear night, planets?" inquired Philip."Those that twinkle are not planets; they are fixed stars," said Frank. "A planet does not twinkle. It has no light of its own. It shines just as the moon shines, because the sun gives it light.""But our earth does not shine!" said Philip."Indeed it does," explained Frank. "Our earth appears to Venus and Mars as a shining planet." ”
