Planet Symbols

Astronomical symbols from Ptolemy to modern astrophysics

Planetary symbols originated in antiquity as astrological and mythological ligatures in Byzantine and medieval European astronomical texts. Each symbol visually encodes attributes of Greco-Roman deities: Mercury’s winged caduceus ☿ (U+263F), Venus’s hand mirror ♀ (U+2640), Earth’s orb with a cross ♁ (U+2641), Mars’s shield and spear ♂ (U+2642), Jupiter’s thunderbolt ligature ♃ (U+2643), and Saturn’s sickle ♄ (U+2644). In historical manuscripts, these signs served as vital shorthand for calculating ephemerides and documenting astronomical transits.

Today, planetary glyphs remain indispensable in astrophysics papers, planetary science summaries, and celestial almanacs. To build comprehensive astrological charts or sky maps, you can pair these signs with our zodiac symbols catalog, check lunar phases in moon symbols, or explore biological connections in our gender symbols collection.

Alchemical heritage and biological gender associations

During the Renaissance, alchemists adopted the seven classical planetary glyphs to represent corresponding terrestrial metals: Gold (Sun ☉), Silver (Moon ☽), Quicksilver (Mercury ☿), Copper (Venus ♀), Iron (Mars ♂), Tin (Jupiter ♃), and Lead (Saturn ♄). In the 1750s, the pioneering Swedish botanist Carl Linnaeus repurposed the symbols of Venus ♀ and Mars ♂ to distinguish female and male reproductive structures in his botanical classifications, establishing the standard biological notation in use worldwide today.

This deep historical overlap makes planetary characters uniquely versatile across multiple disciplines. When rendering these signs on modern screens, they adjust seamlessly to surrounding font styles, providing clean typographic consistency in scientific tables and academic manuscripts.

Glyph variants for Uranus, Neptune, and dwarf planet Pluto

Following the invention of the telescope, astronomers required novel symbols for newly discovered celestial bodies. When William Herschel discovered Uranus in 1781, he was honored with a monogram combining the letter H with a globe: ♅ (U+2645). Later, German and French astronomers devised an alternative planetary design featuring a circle surmounted by an arrow: ⛢ (U+26E2). Neptune is universally recognized by the trident of the sea god: ♆ (U+2646). For Pluto, astronomers originally devised the monogram of Percival Lowell: ♇ (U+2647), while modern astrologers frequently favor the biconceptual planetary glyph ⯓ (U+2BD3).