The upper panel shows that on the summer solstice (which occurs around June 21), the northern half of the Earth is tilted towards the Sun.
(the summer solstice; occurs; T:around June 21) (The upper panel; shows; that on the summer solstice (which occurs around June 21), the northern half of the Earth is tilted towards the Sun) Context(The upper panel shows,List([0, 21))):(the northern half of the Earth; is tilted; towards the Sun; T:on the summer solstice)
The upper panel shows,List([0, 21))
the summer solstice The upper panel the northern half of the Earth
occurs shows is tilted
T:around June 21
that on the summer solstice (which occurs around June 21), the northern half of the Earth is tilted towards the Sun
towards the Sun T:on the summer solstice