♂ Mars

Somewhere in your chart there’s an accelerator. Mars is where it’s installed and how hard it likes to be pressed.

Mars is the planet astrologers assign to drive — desire, pursuit, competition, and the less housebroken cousin of all three, anger. If Venus is what you want, Mars is what you’re prepared to do about it. The old texts called it the lesser malefic, ranking it one rung friendlier than Saturn on the list of planets nobody invited, and for the same reason: it governs material that’s uncomfortable and indispensable in equal measure.

What Mars runs on

Heat, applied or leaking. Mars rules Aries, and Aries conduct is Mars in its cleanest form: see it, want it, start. Traditionally it also ruled Scorpio — modern astrology hands that sign to Pluto, but the old assignment still explains Scorpio’s version of the engine, which trades Aries’ sprint for a siege. One rulership burns fast and forgets; the other banks the coals and remembers.

In a birth chart, Mars marks how you go after things and what your conflict style is before you’ve had a chance to edit it. A Gemini Mars argues to find out what it thinks; a Cancer Mars defends rather than attacks and is far more dangerous on defense; a Capricorn Mars — the exaltation — schedules the offensive for the quarter it will actually work.

Reading your Mars

The sign gives you the temperature and the tactics. The house tells you where the engine is pointed: a sixth-house Mars works it off, a seventh-house Mars picks partners it can spar with, a tenth-house Mars treats the career ladder as a climbing wall. Aspects describe the wiring — Mars square Saturn drives with the parking brake on until it learns the brake is also a clutch, while a Mars–Venus conjunction can’t always tell wanting from winning.

Run your chart and find the house Mars occupies. That’s the arena where you compete whether or not anyone else knows there’s a contest — worth knowing, because unspent Mars doesn’t evaporate. It converts to irritability at roughly a one-to-one exchange rate.

The two-year lap

Mars circles the zodiac in about two years, spending six or seven weeks in a sign when it’s moving well. Roughly every 26 months, though, Earth overtakes it and Mars appears to reverse for a bit over two months — the rarest retrograde of the classical planets, and the one astrologers watch most warily, since the slowdown around it can hold Mars in a single sign for half a year. The traditional reading is a stalled campaign: momentum drops, timing misfires, and pushing harder produces heat instead of progress. The traditional advice is to spend the season on strategy, which competitive people receive as punishment and later describe as the useful part.

Between retrogrades, Mars keeps a simpler calendar: every two years it returns to its natal position — the Mars return, a low-stakes cousin of the famous Saturn checkpoint, and a reasonable moment to ask whether the engine and the destination still agree.