Solar Eclipse of Venus

It's a rare day for astronomers. The

Transit of Venus occurs only twice every 120 years, but weather may be the problem for viewing today's rare event in the United States.

Ed Krupp, Director of the

Griffith Observatory and author

Skywatchers, Shamans and Kings: Astronomy and the Archeology of Power

, has more on what the event is and what it's meant to astronomers and to various cultures.