Karl Ludwig Harding, who discovered and named Juno, assigned to it the symbol of a scepter topped with a star. The symbol for Pallas, the spear of Pallas Athena, was invented by Baron Franz Xaver von Zach, and introduced in his Monatliche Correspondenz zur BefГ¶rderung der Erd- und Himmels-Kunde. Shortly after Giuseppe Piazzi's discovery of Ceres, a group of astronomers ratified the name, proposed by the discoverer, and chose the sickle as a symbol of the planet. Firstly, they were listed as planets, and half a century later, renamed as asteroids. The astrological symbols for the first three objects discovered at the beginning of the 19th century - Ceres, Pallas, and Juno - were also created after their discovery. After Neptune was discovered, the Bureau des Longitudes proposed the name Neptune and the familiar trident for the planet's symbol, though at bottom may be either a cross or an orb. In a letter to Herschel, Lalande described it as 'un globe surmontГ© par la premiГЁre lettre de votre nom' ('a globe surmounted by the first letter of your name'). Another symbol,, was suggested by Lalande in 1784. An inverted version of that same symbol, was in use in the early 20th century. KГ¶hler and refined by Bode, was intended to represent the newly discovered metal platinum since platinum, sometimes described as white gold was found by chemists mixed with iron, the symbol for platinum combines the alchemical symbols for iron, в™‚, and gold, в‰.

For Uranus, two variant symbols are seen. Symbols for Uranus and Neptune were created shortly after their discovery. Major planets discovered in the modern era ДЄ similar symbol was present in the Ancient Chinese Oracle Bone Script Bronze script character that is a predecessor to the modern Chinese sun character. However, the sun symbol may have been influenced by the similar ancient Egyptian 'sun' hieroglyph, which was a circle that sometimes had a dot in the center ( U+131F3 р“‡і ).

The conventional symbols for the signs of the zodiac also develop in the Renaissance period as simplifications of the classical pictorial representations of the signs. The modern sun symbol, pictured as a circle with a dot ( в‰), first appeared in the Renaissance. A diagram in Johannes Kamateros' 12th century Compendium of Astrology shows the Sun represented by the circle with a ray, Jupiter by the letter zeta (the initial of Zeus, Jupiter's counterpart in Greek mythology), Mars by a shield crossed by a spear, and the remaining classical planets by symbols resembling the modern ones, without the cross-mark seen in modern versions of the symbols.

Bianchini's planisphere, produced in the 2nd century, shows Greek personifications of planetary gods charged with early versions of the planetary symbols: Mercury has a caduceus Venus has, attached to her necklace, a cord connected to another necklace Mars, a spear Jupiter, a staff Saturn, a scythe the Sun, a circlet with rays radiating from it and the Moon, a headdress with a crescent attached. Maunder finds antecedents of the planetary symbols in earlier sources, used to represent the gods associated with the classical planets. The symbols for Jupiter and Saturn are monograms of the initial letters of the corresponding Greek names, and the symbol for Mercury is a stylized caduceus. The written symbols for Mercury, Venus, Jupiter, and Saturn have been traced to forms found in late Classical Greek papyri. In the original papyri of these Greek horoscopes, there was a circle with the glyph representing shine ( ) for the Sun and a crescent for the Moon. Symbols for the classical planets, zodiac signs, aspects, lots, and the lunar nodes appear in the medieval Byzantine codices in which many ancient horoscopes were preserved. In the inner ring, clockwise from Gemini, are the Moon, Ceres, ascending node, Sedna, Uranus, Eris, Chiron, Neptune, Pallas, Gonggong, Jupiter, Saturn, Pluto, Quaoar, Juno, descending node, Venus, Vesta, Haumea, Mercury, Mars, Makemake, Hygiea and Orcus. A wheel chart produced by Astrolog, showing symbols for the signs of the zodiac (outer ring), classical planets, dwarf planets and asteroids (inner ring).

Io astrology software symbols