Shadow Follows

Light falling On an opaque object Casts a shadow On surface behind. Object itself Is bright on one side It's all dark On the opposite. Glowing sun Lights up turning earth Giving us Familiar night and day. Moon as well Goes through phases As it turns around The earth in a month. Some times at full moon Earth's shadow envelopes And covers the moon Resulting in lunar eclipse. Moon in new moon phase May cast its shadow on earth Brings darkness at day We call it the fiery solar eclipse. Many suns Exist in the universe So are many Planets and moons. How many are Sun-like stars in the universe? How many moons And planet-like objects? How many sources? How many cast shadows? How many eclipses? How frequent? All are challenges. An object is clearly Identified by shadow it casts As one keeps on moving One's shadow follows to the end.