☉

The shield of the sun god Apollo, with a boss in the center. Medieval replacement of 🜚, the sun with a single ray, which in ancient times had replaced a sun orb surrounded by multiple rays.[1]

☉

1. (astronomy, astrology) Sol, the Sun.

   a subscript to variables in mathematical equations, such as π_☉ (solar parallax)

   • 1803, Robert Patterson, The Papers of Thomas Jefferson, volume 40, Princeton University Press, published 2013, pages 71:

     Suppose the apparent angular distance of the sun & moon's nearest limbs [...] to be 110°.2′.30″ the app. alt of ☉'s lower limb measuring 20°.40′ and that of ☽'s lower limb 35°.24′

2. (astronomy) solar mass
3. (botany) annual[2]
4. (alchemy) (archaic) gold
5. (rare) Sunday (refers to the Latin phrase dies Solis, which literally means "Sun's day")
6. (philately) cancellation (ordinary post-office cancellation mark)
7. (chemistry) (obsolete) hydrogen (Daltonian symbol)

   Technically, this should be red: ☉. May also be typeset ⊙.

• (sun, daytime): ☼
• (sun, gold): 🜚 (obsolete)

1. M_☉ solar mass (as a unit of measurement for the masses of stars)
2. L_☉ solar luminosity (as a unit of measurement)
3. R_☉ solar radius (as a unit of measurement)
4. S_☉ solar constant (as a unit of measurement)

• (Solar eclipse)

Planetary symbols
· · · – · – · · · · · · · · · · – · · – · · · · · · · ·

• ⊙ (mathematics, computing)

☉

1. city center