Lunar Tail The lunar tail and the sodium spot were first discovered in the late 1990s. Since then, it has been observed that the slick changes its brightness. Bombardment of the Moon by meteoroids and high-energy solar wind particles releases sodium atoms from the regolith. These, in turn, are collected by the solar wind in a kind of tail that extends almost 800,000 km behind our satellite. 1.1K views18:00
