What are hair-like phenomena observed in the chromosphere called?

The hair-like phenomena observed in the chromosphere are known as spicules. These dynamic structures are composed of jet-like bursts of gas that extend upward from the surface of the Sun into the solar atmosphere. Spicules are typically short-lived, lasting only a few minutes, and they can reach heights of up to several thousand kilometers. Their formation is closely related to the Sun's magnetic activity and the complex interactions between solar magnetic fields and plasma.

In contrast, sunspots are dark areas on the surface of the Sun caused by magnetic activity that inhibit convection; they do not resemble hair-like structures. Solar winds refer to streams of charged particles emitted from the Sun's atmosphere, and they have a significant impact on space weather but do not appear as hair-like features. Solar flares are explosive bursts of energy that occur in the Sun's atmosphere, leading to the release of intense radiation, but they are also distinct from the slender, rapidly moving filaments that characterize spicules.