Lunar eclipse how does it work




















The Moon is slightly tinted when it passes through the light outer portion of the shadow, the penumbra, but turns dark red as it passes through the central portion of the shadow, called the umbra. When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth.

When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. Lunar eclipses can only happen when the Moon is opposite the Sun in the sky, a monthly occurrence we know as a full Moon. But lunar eclipses do not occur every month because the Moon's orbit is tilted five degrees from Earth's orbit around the Sun.

Without the tilt, lunar eclipses would occur every month. Lunar and solar eclipses occur with about equal frequency. A total lunar eclipse takes place when the Earth comes between the Sun and the Moon and its shadow covers the Moon.

Eclipse watchers can see the Moon turn red when the eclipse reaches totality. Watch it LIVE! Three of these eclipses are total, while the November , , is a deep partial eclipse. So deep that it is almost a total eclipse. The astronomical term for this type of alignment is syzygy , which comes from the Greek word for being paired together. The Moon does not have its own light but shines because its surface reflects the Sun's rays.

During a total lunar eclipse, the Earth comes between the Sun and the Moon and blocks any direct sunlight from reaching the Moon. The Sun casts the Earth's shadow on the Moon's surface. Types of Eclipses. For a lunar eclipse to occur, the Sun, Earth, and Moon must be roughly aligned in a line.

Otherwise, the Earth cannot cast a shadow on the Moon's surface and an eclipse cannot take place. When the Sun, Earth, and Moon come together in a straight line, a total lunar eclipse takes place. When the three bodies are aligned in a way that the Moon is partly covered by the Earth's umbra, a partial lunar eclipse is the result. On the other hand, if only the outer part of Earth's shadow covers the Moon, a penumbral lunar eclipse takes place.

In very rare occasions, there can be five solar eclipse s in a year. The last time this happened was in and the next time it will happen will be in There are four types of solar eclipses: total, partial, annual and hybrid. Total solar eclipses happen when the sun is completely blocked by the moon. Total solar eclipses are only visible from a specific part of the Earth.

Areas around that path will only see a partial solar eclipse. The Moon passes off-center and only a portion of the Sun is obscured. A hybrid eclipse is a combination of a total and an annular eclipse; its starts as one type and transitions to another.



0コメント

  • 1000 / 1000