If experiencing totality during the April 8 total solar eclipse makes you hungry for another celestial spectacle, you may have to wait decades. "Solar eclipses are sort of like potato chips -- once you eat one, you want another one," Fred Espenak, a former astrophysicist from NASA Goddard Space Flight Center and author of "Road Atlas for the Total Solar Eclipse of 2024," told ABC News. "Every eclipse is unique and exciting," Espenak continued.