* Astronomy

Thousands of modern-day druids, pagans and partygoers converged on Stonehenge early Thursday as people across the northern hemisphere prepared to welcome the summer solstice - the longest day of the year.
The ancient stones were bathed in a brilliant purple light hours before dawn Thursday as screaming, chanting revellers staggered between the ancient stones amid the sound of drums and whistles.
An estimated 20,000 people are expected to crowd around the site in Wiltshire, in southwestern England, to witness the sun rise.
Solstice celebrations were a highlight of the pre-Christian calendar. People in many countries still celebrate with bonfires, maypole dances, and courtship rituals.

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