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Because the Moon is independent of the Earth. Also, eclipses can be caused by the sun. The galaxy is a dangerous place and many things happen that "don't help earth," like meteors, super novas, etc. Its just how the universe works.
To add to this, yes they do not help Earth. But for the most part they don't exactly even directly effect us. You have to remember that Earth is not the only planet. The eclipse is a natural thing because we cannot stop it, it almost just 'happens'. One more thing is that humans may 'rule' the Earth, but Mother Nature and all that shizbang is just controlling us. When we think that it doesn't help the Earth, remember it just doesn't help US. Hope that helps!
What else can I help you with?
What are the kinds of eclipses?
On earth there are 2 eclipses, Lunar and Solar eclipses
How are solar eclipses alike from lunar eclipses?
All eclipses are shadows. A solar eclipse is the Moon's shadow on the Earth. A lunar eclipse is the Earth's shadow on the Moon.
What other eclipse is there?
Earth has lunar eclipses and solar eclipses. Both can be partial or complete.
Where did the first solar eclipse occur?
Solar eclipses are caused by the shadow of the Moon hitting the Earth. Solar eclipses happen on the Earth.
Why and when do the lunar and solar eclipses occur?
Lunar eclipses occur when the Earth passes between the Sun and the Moon, causing the Earth's shadow to fall on the Moon. Solar eclipses happen when the Moon passes between the Sun and the Earth, blocking the Sun's light from reaching Earth. Lunar eclipses can only happen during a full moon, while solar eclipses can only occur during a new moon.
What type of patterns do eclipses form?
Eclipses form predictable patterns based on the alignment of the Sun, Earth, and Moon. Solar eclipses occur during a new moon when the Moon passes between the Earth and the Sun, casting a shadow on Earth. Lunar eclipses occur when Earth passes between the Sun and the Moon, causing Earth's shadow to fall on the Moon.
How many eclipses are there?
There are typically between 2 to 7 eclipses each year, which can be a combination of solar and lunar eclipses. Solar eclipses occur when the Moon passes between the Earth and the Sun, while lunar eclipses happen when the Earth passes between the Sun and the Moon.
Are all parts of the earth affected by eclipses?
Solar eclipses are visible only for a small portion of the Earth's surface where the moon covers the sun. Lunar eclipses in which the Earth's shadow covers the moon are visible for long distances but it's the color of the moon effected by those not the Earth.
What is the same about solar eclipse and lunar eclipses?
The thing that is the same is that the same three bodies are lined up. In lunar eclipses, the order is Sun, Earth, Moon and in solar eclipses, it's Sun, Moon, Earth.
How are moon phases associated with solar and lunar eclipses?
Moon phases and lunar eclipses both deal with the earth. They are deal with both the sun and the earth.
How are a lunar eclipse and a new moon alike?
Te moon eclipses the sun and the earth eclipses the moon
Do solar eclipses occur at night?
No, solar eclipses occur during the day when the Moon passes between the Earth and the Sun, casting a shadow on the Earth. Nighttime eclipses are lunar eclipses when the Earth passes between the Sun and the Moon.
