what are the unique features of the sun
General Characteristics of the Sun. The sun is a star of about medium size; it appears so much larger and brighter than the other stars because of its relative nearness to the earth.The earth's distance from the sun varies from 91,377,000 mi (147,053,000 km) at perihelion to 94,537,000 mi (152,138,000 km) at aphelion (see apsis).The mean distance is c.92,960,000 mi (149,591,000 km); this is taken as the astronomical unit (AU) of distance used for measuring distances within the solar system.eneral Characteristics of the Sun. The sun is a star of about medium size; it appears so much larger and brighter than the other stars because of its relative nearness to the earth.