Astrology charts interpret planetary and star interactions for personality insights. Zodiac chart divided into 12 sections based on birth date. Birth date determines Zodiac sign, which influences personality traits
Earth has a day of 23 hours 56 minutes. Moon rotates once every 29.5 days. Scientists measure other planets' days relative to Earth's
Ring systems are discs or toruses composed of solid material around astronomical objects. All four giant planets (Jupiter, Saturn, Uranus, Neptune) have ring systems. Saturn's rings are most extensive, containing water ice and trace amounts of rock. Uranus has 13 rings, mostly dark and opaque, with limited dust. Neptune's rings are faint and dusty, with 20-70% being dust
Astrological and astronomical symbols have historically overlapped. Medieval Byzantine codices preserved ancient horoscopes with planetary symbols. Modern sun symbol appeared in Renaissance as circle with dot. Classical planetary symbols traced to Greek papyri from late Classical period
Terrestrial planets are composed primarily of silicate, rocks or metals. All terrestrial planets have metallic core surrounded by silicate mantle. Earth's Moon, Io and Europa may also be considered terrestrial planets. Large rocky asteroids Pallas and Vesta are sometimes included
Asaph Hall discovered Phobos and Deimos in August 1877 at US Naval Observatory. Named after Greek mythological twins Phobos (fear) and Deimos (terror). Swift's Gulliver's Travels and Voltaire's story also mentioned Martian moons