The lunar eclipse of August 6, 2009 will be a penumbral eclipse, meaning that the Moon will pass - partially! - through the outer, brighter layers of the Earth's shadow. While observers with the proper instruments would be able to view the eclipse throughout Africa, Europe or South America (and parts of southwestern Asia) the eclipse will not be generally visible to the naked eye.
The most anyone will be able to see is a very slight dimming of the Sun's light shining on one side of the Moon.
You can simulate this eclipse. Stand three bright lights a few inches apart; this will represent the Sun. Notice the amount of illumination visible on a small ball at the other end of the room; this represents the Moon.
Turn off ONE of the lights. This represents the decrease in illumination caused by the penumbral eclipse. Look at the ball; not much difference, is there?
Penumbral lunar eclipses generally are not visible.
The umbra.
A penumbral lunar eclipse occurs when the moon passes through the Earth's penumbra.
In any eclipse, the Sun, Moon and Earth line up more-or-less exactly. The eclipse is the shadow; a solar eclipse is the shadow of the Moon darkening a part of the Earth, while a lunar eclipse is the shadow of the Earth darkening the Moon.
If there is a total lunar eclipse, everybody sees it as total. If there is a total solar eclipse, only people in a small part of Earth see it as total - most will see it as a partial eclipse, or not at all.
When you see a lunar eclipse, it's always at night on your part of the earth. -- A lunar eclipse can only occur at the exact time of the Full Moon. -- The Full Moon is visible only in the night sky. So obviously, if you are in a place where you can see the Full Moon, then you are in a place where you can see a lunar eclipse if one is in progress, and it is night-time where you are.
The lunar eclipse is part of the sun, earth, and moon.
That is a lunar eclipse.
The Earth has to be directly between the Moon and the Sun to caus a lunar eclipse.
a total lunar eclipse is an eclipse which covers the moon fully. whereas a partial one is when some part of moon is covered.
The umbra.
A penumbral lunar eclipse occurs when the moon passes through the Earth's penumbra.
A lunar eclipse occurs when the normally full Moon crosses into the Earth's shadow, thereby creating a darkened area on the moon. During a partial lunar eclipse, only part of the Moon falls into the Earth's shadow. During a full lunar eclipse, the entire moon crosses through the earth's shadow, and therefore the entire moon is darkened.
The best part of it starts around 1:45
In any eclipse, the Sun, Moon and Earth line up more-or-less exactly. The eclipse is the shadow; a solar eclipse is the shadow of the Moon darkening a part of the Earth, while a lunar eclipse is the shadow of the Earth darkening the Moon.
If there is a total lunar eclipse, everybody sees it as total. If there is a total solar eclipse, only people in a small part of Earth see it as total - most will see it as a partial eclipse, or not at all.
There will be a partial lunar eclipse on June 26, 2010, which will be visible from the west coast of the US, from Australia, and from Japan and the eastern part of Asia. There will be a total lunar eclipse on December 21, 2010, which will (weather permitting!) be visible from anyplace in North America.
A lunar eclipse happens when all or part of the moon passes into the shadow of Earth. A solar eclipse happens when part of Earth is in the shadow of the moon.