Astronomy Question:

The great red spot is a storm on Jupiter that has been raging for around 300 years or so - that is when it was first spotted.

That is quite a storm really is not it, and we do not know when it will die out. It is also rather large as the question implies.

The answer is that it is estimated something in the region of two earths would fit into the great red spot alone, which gives some idea of the colossal scale of the gas giant that is Jupiter in comparison to the smaller ball of rock that is planet Earth.