Moon's gradual drift will erase future total solar eclipses

The Moon is receding from Earth at about 3.8 cm per year due to tidal interactions, a rate precisely measured by lunar laser ranging using Apollo and Lunokhod reflectors. As the Moon moves farther away, its apparent size will eventually be too small to fully cover the Sun, ending total solar eclipses within roughly 500–800 million years. Until then, upcoming total eclipses seen from Earth occur within this narrow, finite window, making the current era temporarily unique in cosmic terms.