astronomical seasons

Satellite views of Earth on the solstices and equinoxes. From left to right, a June solstice, a September equinox, a December solstice, a March equinox, via NASA Earth Observatory.

What is the Reason for the Season? Equinox, Solstice & Everything Else

What is an equinox and what is a solstice? What is the reason for the four seasons we get during the year? And what is the difference between astronomical and meteorological seasons?