Interplanetary dust density distribution of the diffuse cloud, the circumsolar ring, and the Earth-trailing feature. Left column: cross section showing the xz plane (y = 0). The gray-dashed line represents the ecliptic plane. Right column: Cross section showing the xy plane (z = 0). The gray-dashed circle represents the orbit of Earth. Top row: the density of the diffuse cloud. Middle row: the density of the circumsolar ring. Bottom row: the density of the Earth-trailing feature. The blue dot represents Earth.