Answer :
That's the line made up of every point on Earth that's about 23.5 degrees north of the equator.
It's the farthest north that the sun can ever be straight up over your head. That
happens there around June 21 every year ... the first day of Summer in the northern
hemisphere.
It's the farthest north that the sun can ever be straight up over your head. That
happens there around June 21 every year ... the first day of Summer in the northern
hemisphere.
