Earth referred to as "moons", after Earth's. The gravitational attraction between Earth and the Moon causes tides on Earth. The same effect on the Moon has led to its tidal locking: its rotation period is the same as the time it takes to orbit Earth. As a result, it always presents the same face to the planet. As the Moon orbits Earth, different parts of its face are illuminated by the Sun, leading to the lunar phases; the dark part of the face is separated from the light part by the solar terminator. Due to their tidal interaction, the Moon recedes
Wall of the Sun and Wall of the Moon Wall of the Sun and Wall of the Moon The Wall of the Sun and Wall of the Moon are a pair of murals made of ceramics and designed by the Catalan artist Joan Miró for the UNESCO building in Paris. The works were carried out by the ceramicist Josep Llorens Artigas in 1955. Initially, the walls were installed on the Place de Fontenoy in Paris, but afterwards were enclosed in a building that was constructed in order to protect them from damage caused by acid rain. Joan Miró and Josep Llorens Artigas met in 1910 at the school of