Mark your calendar – Moon will pass in front of Sun over parts of USA, Pacific and Japan
By – Dr. Tony Phillips NASA – On Sunday, May 20th, the sun is going to turn into a ring of fire. It’s an annular solar eclipse–the first one in the USA in almost 18 years.
An annular eclipse occurs when the Moon passes directly in front of the sun, but the lunar disk is not quite wide enough to cover the entire star. At maximum, the Moon forms a “black hole” in the center of the sun.
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![lightning-over-redoubt Lightning flashes in a roiling cloud of ash over Mt. Redoubt on March 27th. Particles of ash rubbing together in the cloud (like socks rubbing against carpet) are partly responsible for the buildup of electrostatic charge. Photo credit and copyright: Bretwood Higman, Ground Truth Trekking. [click for more]](http://www.njnnetwork.com/njn/wp-content/uploads/2009/04/lightning-over-redoubt-240x183.jpg)
![mt-redoubt Mt. Redoubt has erupted at least 19 times since March 22, 2009. Alaska photographer Thomas Kerns took this picture of the volcano in action on March 31st. [Larger image]](http://www.njnnetwork.com/njn/wp-content/uploads/2009/04/mt-redoubt-240x212.jpg)
