Sun summary

Huitzilopochtli, Aztec sun and war god, one of the two principal deities of Aztec religion, often represented in art as either a hummingbird or an eagle. Huitzilopochtli’s name is a cognate of the Nahuatl words huitzilin, “hummingbird,” and opochtli, “left.” Aztecs believed that dead warriors were

Pluto, large, distant member of the solar system that formerly was regarded as the outermost and smallest planet. It also was considered the most recently discovered planet, having been found in 1930. In August 2006 the International Astronomical Union (IAU), the organization charged by the

Neptune, third most massive planet of the solar system and the eighth and outermost planet from the Sun. Because of its great distance from Earth, it cannot be seen with the unaided eye. With a small telescope, it appears as a tiny, faint blue-green disk. It is designated by the symbol ♆. Neptune

Mercury, the innermost planet of the solar system and the eighth in size and mass. Its closeness to the Sun and its smallness make it the most elusive of the planets visible to the unaided eye. Because its rising or setting is always within about two hours of the Sun’s, it is never observable when