Summer solstice is here again.

Hello everybody,
Summer solstice started last Monday here in Spain but did it start in Argentina?
The summer solstice is the longest day of the year. We can enjoy almost 17 hours of daylight.
Do you know the meaning of "solstice"?

Do you know why seasons change? Do you know why winter is  in Southern Hemisphere now and summer in Northern? Do you know whar rotation is? And revolution?


Watch this video if you want to get more information about  the movements of the Earth.