täysvarjon

Täysvarjon is a Finnish term that translates to "full shadow" or "total eclipse." It is most commonly used in astronomy to describe the phenomenon of a total solar eclipse, where the Moon completely obscures the Sun. During a total solar eclipse, the Sun's corona, its outer atmosphere, becomes visible as a faint halo around the dark silhouette of the Moon. This celestial event is a rare and awe-inspiring sight.

The term "täysvarjon" can also be used in a more general sense to describe any situation where an object is completely in shadow, with no light reaching it from a particular source. For example, a deep cave or the dark side of a planet might be described as being in täysvarjon. However, its primary and most dramatic application remains in the context of solar eclipses. The precise alignment of the Sun, Moon, and Earth is required for a total solar eclipse to occur, making them significant astronomical events that capture public attention and scientific interest. Observing a täysvarjon offers a unique opportunity to study the Sun's corona, which is otherwise hidden by the Sun's brightness.