A lunar and solar eclipse shadow consists of an umbra, the dark center of the shadow, a penumbra, the outer part, and an antumbra, a type of half-shadow.

The penumbra (from the Latin paene "almost, nearly" and umbra "shadow") is the region in which only a portion of the light source is obscured by the occluding body. An observer in the penumbra experiences a partial eclipse.

2024年11月4日 · A solar eclipse occurs when the Moon passes between the Sun and Earth, casting its shadow on Earth. The shadow comprises two concentric cones, a dark inner shadow called the umbra and a lighter outer shadow called the penumbra.

2014年4月8日 · During an eclipse, two shadows are cast. The first is called the umbra (UM bruh). This shadow gets smaller as it goes away from the sun. It is the dark center of the eclipse shadow. The second shadow is called the penumbra (pe NUM bruh). The penumbra gets larger as it goes away from the sun.

Depending on which shadow type is involved, we can experience 3 different types of solar eclipses and 3 different types of lunar eclipses on Earth: Umbra Eclipses. The umbral shadow can produce the following eclipses: Total solar eclipse – the Moon's umbra falls on the Earth's surface, and the observer is within the umbra.

2020年11月3日 · The umbra is the center portion of a shadow, being the darkest part. It is responsible for the greatest eclipses when it comes to astronomy. The umbra causes the total lunar eclipse, the total solar eclipse, and the partial lunar eclipse. The total lunar eclipse occurs when the Earth’s umbra completely veils the Moon.

2020年11月3日 · If a solar eclipse occurs when the Moon is at its greatest distance from us, the tip of the Moon’s v-shaped umbra may reach the Earth’s surface during parts of the eclipse, its diameter being close to zero.

2024年9月19日 · Traditional solar eclipse maps depict the shape of the Moon's umbra shadow as a smooth oval, but more detailed calculations that account for the Moon's terrain have revealed that the shape is a many-sided polygon.

2025年2月3日 · Solar eclipse, the Moon coming between Earth and the Sun so that the Moon’s shadow sweeps over Earth’s surface. This shadow consists of two parts: the umbra, a cone into which no direct sunlight penetrates; and the penumbra, which is reached by light from only a part of the Sun’s disk.

2016年12月13日 · The lunar umbra is the part of the Moon's shadow where the entire Sun is blocked by the Moon. In space, it's a cone extending some 400,000 kilometers behind the Moon. When the small end of this cone hits the Earth, we experience a total solar eclipse.