Total lunar eclipse promises to be colorful
David Perlman, Chronicle Science Editor
Tuesday, February 19, 2008
Skywatchers alert!
The Earth's shadow will swallow the moon for almost an hour Wednesday
evening - and if rainy skies don't cloud it out, the sight should be
spectacular throughout California.
Neither telescopes nor binoculars will be needed to follow the event
from start to finish, as it will all be happening in plain view. Unlike
a solar eclipse, a lunar eclipse occurs only at night, so there's no
danger like the one that exists from staring at the sun during a solar
eclipse.
The first sign of a shadow passing across the full moon's face - the
partial eclipse - will come at 5:43 p.m. It won't be dark then, but the
evening light will be dim enough to see the moon itself gradually grow
fainter.
At 7:01 p.m., the shadow of the Earth will cover the moon entirely, and the eclipse will be total.
Totality will end at 7:51 p.m., and then, as the shadow slowly passes
off the moon, the eclipse will be partial again - until 9:09 p.m. when
the partial eclipse will be over, leaving the full moon shining
brightly once more.
Total lunar eclipses occur when the sun, Earth and moon are exactly
lined up in space with Earth in the middle. The moon slowly moves in
and then out of Earth's shadow as the Earth-moon pair revolves around
the sun.
These eclipses take place only when the moon is full, and because
Earth's atmosphere filters out most of the sun's blue light, watchers
see only the red wavelengths - which means that during totality the
moon can appear anything from a rusty red-brown to a brilliant orange.
The last eclipse over the region in August was fogged-out in many parts
of San Francisco, but was spectacularly colorful wherever skies were
clear. It may well be the same this time, although some weather
forecasters predict partly cloudy skies and a chance of showers.
Amateur and professional astronomers will be on hand at the Chabot
Space and Science Center in Oakland, Foothill College in Los Altos, the
Randall Museum in San Francisco and the College of San Mateo to explain
the celestial event for the public. They will also train telescopes on
the moon to show details of lunar crater rims that will become
highlighted during the partial phases of the eclipse.
In ancient times, frightening legends surrounded lunar eclipses: the
moon was being gobbled up by monsters; evil spirits were practicing
their powers; sacred chants and spells could make the moon return from
its hiding place, or bring it back to life after death. We now know
better.
As Andrew Fraknoi, the ebullient chairman of astronomy at Foothill
College, says, "The round shape of the Earth's shadow suggested to the
ancient Greeks more than 2,000 years ago that the Earth's shape must be
round, too. Eclipse after eclipse, they saw the same round shape of the
Earth's shadow and deduced that we live on a round planet - long before
spacecraft and astronaut pictures showed the Earth's blue globe from
orbit."
Fraknoi offers a suggestion for Wednesday's eclipse:
Because it will begin so early in the evening, the moon will be just
rising in the east, so when looking eastward it's best to choose a high
vantage point lest hills or tall buildings obscure the rising moon
entirely.
Fred Espenak of NASA's Goddard Space Flight Center has calculated all
the lunar eclipses that have or will ever happen during the 7,000 years
between 2000 B.C. and A.D. 5000. He finds there have been or will be
3,505 total eclipses, and 4,213 have been or will be partial.
The next total eclipse of the moon that will be visible for California
viewers will be on Dec. 10, 2010, at about the same time as this one.
Catch Wednesday's eclipse if the sky is clear, Fraknoi says, because it may be foggy or cloudy two years from now.
When the show begins and ends
Wednesday evening's lunar eclipse will begin in the eastern sky.
Partial eclipse: 5:43 p.m.
Total eclipse: 7:01 p.m.
Total eclipse ends: 7:51 p.m.
Partial eclipse ends: 9:09 p.m.
(times are PST).
This is so cool...check it out!
An animation of the lunar eclipse happening tonight (times on mulit-media animation are east coast)...
ECLIPSE ANIMATION!
Also, tonight is Black Phoenix's Full Moon Lunacy Will Call event beginning at 7 pm.
Sadly, they are backordered on the Eclipse oil so it won't be available but Cheshire Moon and all the Valentine/Lupercalia oils will be as well as regular catalog.
Dress code is Lupercalia.
Be there!
Recent Comments