In the northern hemisphere, the longest day of the year when the Sun is farthest north. In the southern hemisphere, this would be your winter solstice, marking the shortest day of the year. The summer solstice marks the first day of the season of summer. The declination of the Sun on the (northern) summer solstice is known as the tropic of cancer (23° 27′).
http://scienceworld.wolfram.com/astronomy/SummerSolstice.html
In 2011, NASA launched the Juno spacecraft to conduct a study of Jupiter’s polar region. Today, it arrives!
The mission aims to reveal the story of Jupiter’s formation and details of its interior structure. Data from Juno will provide insights about our solar system’s beginnings.
The Delta Aquarids is an average shower that can produce up to 20 meteors per hour at its peak. It is produced by debris left behind by comets Marsden and Kracht. The shower runs annually from July 12 to August 23. It peaks this year on the night of July 28 and morning of July 29. The second quarter moon will block most of the fainter meteors this year but if you are patient you should still be able to catch quite a few good ones. Best viewing will be from a dark location after midnight. Meteors will radiate from the constellation Aquarius, but can appear anywhere in the sky.