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There are times that the umbra of the moon fails to reach the Earth. This is when the moon is at apogee. When this happens, observers witness an annular, or ring, eclipse. During anannular eclipse, observers in the umbra see a thin, bright ring around the moon.
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Can a total solar eclipse be seen by only people in the area of earth within the moons umbra?
True.
What is the larger part of the moons shadow that's less darker then the umbra?
Penumbra.
If the moon is relatively far from the earth so that its umbra does not reach earth someone directly behind the umbra will see what?
If the moon's umbra does not reach Earth, someone directly behind the umbra will see a partial eclipse. The moon will only partially block the sun from their point of view, resulting in a partial shadow cast on Earth. This would be different from a total solar eclipse where the moon completely blocks the sun, creating a total shadow.
Is this true or false total solar eclipse can be seen only by people in the area of Earth within the Moons umbra?
True. A total solar eclipse occurs when the Moon completely blocks the Sun, and it can only be seen by people in the area of Earth within the Moon's umbra, which is the darkest part of the Moon's shadow.
Do people in earth's umbra see a total lunar eclipse?
No, they see night-time. You can see a lunar eclipse (from anywhere) when the MOON is in the earth's umbra.
When a solar eclipse does sunlight penetrate the umbra?
In a solar eclipse, no sunlight penetrates the umbra. This is because the umbra is basically the shadow of the Earth, so in this case, the Earth is receiving the sunlight from the Sun, while both the umbra and moon are in the dark.
Is it possible to have a total lunar eclipse when the moon and sun are both at their maximum distances?
No. If the Moon is close to apogee (the farthest distance from the Earth), then the Moon's umbra doesn't reach all the way to the Earth. (The umbra is the cone of total shadow. When the total shadow hits the Earth, we have a total eclipse.) So when the Moon is near apogee, we get annular, or "ring of fire", eclipses.
How would the size of an umbra change if a body were closer to the sun?
Which body? The one casting the umbra or the one on which it fell? Try it this way: If the Earth and the Sun stayed the same distance apart but the Moon was closer to the Earth, the umbra it made during eclipses would be larger; if it were closer to the Sun (i.e., farther from the Earth) the umbra would shrink, perhaps to nothingness, and only the penumbra would fall on the Earth.
When you are in the moons shadow what is it called?
When you are in the moon's shadow during a solar eclipse, it is called the umbra. This is the central, darkest part of the shadow where the sun is completely blocked by the moon. Outside of the umbra is the penumbra, where the sun is only partially blocked, resulting in a partial eclipse.
Is the umbra bigger in the solar or lunar eclipse and why?
The umbra is bigger in a lunar eclipse, because the Earth is bigger than the Moon.
What fraction of the earth can see the moon centered in the umbra?
During a total lunar eclipse, about half of the Earth can see the moon centered in the umbra. This is because the umbra is the darkest part of Earth's shadow, and it is only visible from the side of the Earth that is facing the moon during the eclipse.
What is the dark inner shadow where total eclipses can be seen on earth?
The dark inner shadow where total eclipses can be seen on Earth is called the umbra. This is the central region of the Moon's shadow during a total solar eclipse, where the Sun is completely blocked out. Observers within the umbra experience the full effect of the eclipse, with the sky darkening and the Sun's corona becoming visible.
