Lunar Eclipse to Occur Wednesday Night
LOS ANGELES (AP) — The last total lunar eclipse until 2010 occurs Wednesday night, with cameo appearances by Saturn and the bright star Regulus on either side of the veiled full moon.
Skywatchers viewing through a telescope will have the added treat of seeing Saturn's handsome rings.
Weather permitting, the total eclipse can be seen from North and South America. People in Europe and Africa will be able to see it high in the sky before dawn on Thursday.
As the moonlight dims — it won't go totally dark — Saturn and Regulus will pop out and sandwich the moon. Regulus is the brightest star in the constellation Leo.
Jack Horkheimer, host of the PBS show "Star Gazer," called the event "the moon, the lord of the rings and heart of the lion eclipse."
Wednesday's event will be the last total lunar eclipse until Dec. 20, 2010. Last year there were two.
The weather could be a spoiler for many in the United States. Cloudy skies are expected for most of the Western states with a chance of snow from the heartland to the East Coast, said Stuart Seto of the National Weather Service.
"It looks like it's going to be a hard one to spot," Seto said.
A total lunar eclipse occurs when the full moon passes into Earth's shadow and is blocked from the sun's rays that normally illuminate it. During an eclipse, the sun, Earth and moon line up, leaving a darkened moon visible to observers on the night side of the planet.
The moon doesn't go black because indirect sunlight still reaches it after passing through the Earth's atmosphere. Since the atmosphere filters out blue light, the indirect light that reaches the moon transforms it into a reddish or orange tinge, depending on how much dust and cloud cover are in the atmosphere at the time.
Wednesday's total eclipse phase will last nearly an hour. Earth's shadow is expected to blot out the moon beginning around 7 p.m. on the West Coast and 10 p.m. on the East Coast. West Coast skygazers will miss the start of the eclipse because it occurs before the moon rises.
Unlike solar eclipses which require protective eyewear, lunar eclipses are safe to view with the naked eye.
Later this year, in August, there will be a total solar eclipse and a partial lunar eclipse.
The Associated Press: Lunar Eclipse to Occur Wednesday Night
Introduction
A total eclipse of the Moon occurs during the night of Wednesday, February 20/21, 2008. The entire event is visible from South America and most of North America (on Feb. 20) as well as Western Europe, Africa, and western Asia (on Feb. 21). During a total lunar eclipse, the Moon's disk can take on a dramatically colorful appearance from bright orange to blood red to dark brown and (rarely) very dark gray.
An eclipse of the Moon can only take place at Full Moon, and only if the Moon passes through some portion of Earth's shadow. The shadow is actually composed of two cone-shaped parts, one nested inside the other. The outer shadow or
penumbra is a zone where Earth blocks some (but not all) of the Sun's rays. In contrast, the inner shadow or
umbra is a region where Earth blocks all direct sunlight from reaching the Moon.
If only part of the Moon passes through the umbra, a partial eclipse is seen. However, if the entire Moon passes through the umbral shadow, then a total eclipse of the Moon occurs. For more information on how, what, why, where and when of lunar eclipses, see the special web page
lunar eclipses for beginners.
NASA - Total Lunar Eclipse: February 20, 2008
Lunar eclipse Wednesday night
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