Tuesday, June 16, 2015 7pm – June Solstice & Mercury.
The June solstice occurs at 16:38 UTC on June 21st. The North Pole of the earth will be tilted toward the Sun, which will have reached its northernmost position in the sky and will be directly over the Tropic of Cancer at 23.44 degrees north latitude. This is the first day of summer (summer solstice) in the Northern Hemisphere and the first day of winter (winter solstice) in the Southern Hemisphere. And on June 24 – Mercury at Greatest Western Elongation. The planet Mercury reaches greatest western elongation of 22.5 degrees from the Sun. This is the best time to view Mercury since it will be at its highest point above the horizon in the morning sky. Look for the planet low in the eastern sky just before sunrise.