Happy Summer! Around 7pm EST the earth will tilt on its axis at an angle closest facing the sun! Perfect heat wave to welcome the summer of 2012.
The summer solstice occurs exactly when the axial tilt of a planet’s semi-axis in a given hemisphere is most inclined towards the star that it orbits. Earth’s maximum axial tilt to our star, the Sun, during a solstice is 23° 26′. This happens twice each year, at which times the Sun reaches its highest position in the sky as seen from the North or South Pole respectively.