The Moon's orbital plane is tilted about 5 degrees to the ecliptic (the Earth's orbital plane), so the Sun, the Moon and Earth do not perfectly align every new moon or full moon. We can have an eclipse only if the alignment of the three bodies happens along the intersection of the two orbital planes.
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.
Eclipses don't happen every month because the Moon's orbit around Earth is tilted, so it doesn't always line up perfectly with the Sun and Earth. This alignment is necessary for an eclipse to occur.
There are generally two solar eclipses each year. About half of them are partial, and the remaining ones are divided between full and annular eclipses. You can look up the catalog of all eclipses from 2000BC to 3000AD on the NASA Eclipse Web Page. We tend to think of solar eclipses as being much more rare. However, the difference is that a solar eclipse is visible only across a narrow strip across the Earth. Since the Earth is 3/4 covered by water, there is a much higher probability that the eclipse will be visible at sea. For example, the total solar eclipse of July 11, 2010 will be visible along a path across the South Pacific Ocean, including a few atolls in French Polynesia, Easter Island, and the southern tip of Chile and Argentina.
High and low tides occur approximately every 12 hours due to the gravitational pull of the moon on the Earth's oceans. As the Earth rotates within this gravitational field, the water is pulled towards the moon, creating a high tide. The position of the moon in relation to the Earth causes two high tides and two low tides each day.
No, cyclones do not occur on the moon. Cyclones are large-scale rotating storms that are driven by temperature differences in the Earth's atmosphere, which the moon lacks due to its lack of atmosphere.
Lunar eclipses occur precisely at the full moon.
Because the orbit of the Moon has a variable angle compared to the ecliptic plane.
New moon (the Earth goes into the shadow of the Moon) Lunar eclipses occur at full moon (the Moon goes into the Earth's shadow)
Solar and lunar eclipses don't occur every month because the orbits of the Earth and the Moon are tilted relative to each other. Eclipses can only happen when the Sun, Earth, and Moon align perfectly, which occurs during specific phases of the Moon (new and full). This alignment happens only a few times a year, resulting in a limited number of eclipses rather than one every month.
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.
The Earth orbits the Sun in a plane that we call the "ecliptic". If the Moon orbited the Earth in that same plane, we would experience eclipses every month. But the plane of the Moon's orbit is about 5 degrees tilted from the ecliptic, and so we only see eclipses at the "nodes" when the Moon's orbital plane crosses the ecliptic at the new or full moons.
At a full moon.
There are two main types of eclipses: solar and lunar. Lunar eclipses occur every 6 months. Solar eclipses occur 2-5 times per year. Eclipses can be partial or total. Partial eclipse covers only part of the sun or moon, while total covers the full entity.
Lunar Eclipses occur when the moon is passing the sun and goes in front of it, making day like night until the moon has passed. They occur every 6 months followed by three partial eclipses. Don get them confused with Solar Eclipses!
The moon would have to be on a flat plane instead of being on a tilt.
Solar eclipses occur when the Moon is in the direct path between the Sun and Earth. Lunar eclipses occur when the Earth is in the direct path between the Sun and the Moon.
Solar eclipses do not occur every month because the Moon's orbit around the Earth is tilted relative to the Earth's orbit around the Sun. This tilt causes the Moon's shadow to typically pass above or below the Earth during a new moon, resulting in a solar eclipse only when the alignment is just right.