The title of the work Eridanus refers to the constellation of the river of ancient Athens that meanders in the night sky. The constellation is visible uniquely from the Southern Hemisphere. The artist evokes a story heard from the past. A story, where with the installation of modern street lamps, has resulted in the residents of Paris being disturbed by the difficulty of seeing the stars in the sky as a result of pollution. The artist decided to restore the stars in Paris by reducing the artificial light. In the process of realization, Horvitz crossed Paris on foot during the night, and transposed the constellation Eridanus on the map of the city. The artist extinguished a lamppost at each point representing the thirty stars of the constellation. At each point, the artist produced two photos — one with the light on and the artist visible, and one with the light off. The artist both procured and made keys that opened control access to the streetlights, and simply turned off the switch. A few days later, the city had turned on the lights again. For an indefinable period, but for at least one night, an inverted constellation appeared in the city of Paris. A constellation, not of light, but of darkness, which in turn, resulted in some stars come back into the visible sky in Paris. The artist began at 8 pm in Montrouge to finish at the Allen Gallery (the last lamppost being above the gallery) at 5am, the night of March 19, 2017.