5 Fun Facts About Summertime Celestial Science

Celestial Science

• The word solstice's Latin roots mean "sun stands still," an apt description of how the astronomical event appears from Earth.
• Since ancient times people have followed the movement of the sun as it rises, crosses the sky, and sets along a path that changes incrementally throughout the year.
• For a few days surrounding the solstice, however, our star seems to rise and set at the same locations. It also hovers at the same noontime spot, pausing before its trajectory begins its incremental shift until year's end—the December solstice.
• The "summer solstice" should be called the "June solstice," because it is actually the winter solstice in the Southern Hemisphere. Despite the reversed seasons, the event has long been observed south of the Equator as well.
• Winter and summer occur largely because the planet is tilted on an axis running through the poles at an angle of 23.5 degrees. As the planet orbits the sun, each hemisphere receives varying amounts of light and warmth determined by the direction in which it is tilted: summer when tilted towards the sun and winter when tilted away.

Source: National Geographic