Figure 1. Various features of the solar photosphere observed in the G-band at 4,305 Å with the Solar Optical Telescope onboard Hinode on May 2. 2007 (Kosugi et al., 2007; Tsuneta et al., 2008). The prominent dark feature is a sunspot. The large dark area in the map is the umbra of the sunspot, which is surrounded by fibril-like penumbra. The other prominent structures include the solar granulation and smaller darker regions known as pores. The solar granulation is divided by the slightly darker intergranular lanes. In some places, due to the concentration of small-scale magnetic field, the intergranular lanes appear brighter (see Figure 5 for a closer look at these smaller magnetic features).