2027 Forecast

Synastry aspect · 180° · orb 8°

Mars Opposition Neptune Synastry

Mars opposition Neptune in synastry means one partner's Mars sits about 180° from the other's Neptune (orb ±8°), an angle read as polarity. It turns up in 4.51% of couples born within five years of each other.

Each side on its own first: Mars in a birth chart, Neptune in a birth chart and birth chart calculator.

In couples
4.51% about 1 in 22
Either way round
8.77% both ways: 0.25%
Angle
180° 6 signs apart · orb ±8°
Birth time
Not needed the date sets it

Simulation of 3 million couples, NASA JPL DE440.

The same aspect with one of these planets: Mars opposition Moon, Mars opposition Sun, Mars opposition Saturn, Lilith opposition Mars, Neptune opposition Venus, Moon opposition Neptune and Ascendant opposition Neptune.

Mars Opposition Neptune in Synastry: Meaning and Rarity

Checked against chance

How common is Mars opposition Neptune in synastry?

Mars opposition Neptune, counted three ways
Mars opposition Neptune, counted three ways Mars opposition Neptune, counted three ways: Couples ≤ 5 yrs apart 4.51%, Any two people, 1940–2010 4.7%, Planets spread evenly 4.44%. Couples ≤ 5 yrs apartCouples ≤ 5 yrs apart: 4.51%4.51%Any two people, 1940–2010Any two people, 1940–2010: 4.7%4.7%Planets spread evenlyPlanets spread evenly: 4.44%4.44%Source: AstroHot simulation, 3 million pairs, NASA JPL DE440astrohot.com Couples ≤ 5 yrs apartCouples ≤ 5 yrs apart: 4.51%4.51%Any two people, 1940–2010Any two people, 1940–2010: 4.7%4.7%Planets spread evenlyPlanets spread evenly: 4.44%4.44%Source: AstroHot simulation, 3 million pairs, NASA JPL DE440astrohot.com

The age gap changes little: 4.19% to 5.03% at any gap up to 40 years.

How the odds are calculated →

By sign

Which signs make Mars opposition Neptune, generation by generation

Mars opposition Neptune, generation by generation: the Mars signs that make it
Mars opposition Neptune, generation by generation: the Mars signs that make it Neptune in Virgo (1928–43): Mars in Pisces; Neptune in Libra (1942–57): Mars in Aries; Neptune in Scorpio (1955–70): Mars in Taurus; Neptune in Sagittarius (1970–84): Mars in Gemini; Neptune in Capricorn (1984–98): Mars in Cancer; Neptune in Aquarius (1998–2012): Mars in Leo. Mars’ sign that makes itAriTauGemCanLeoVirLibScoSagCapAquPisNeptune in Virgo1928–43Neptune in Virgo 1928–43: Mars in AriesNeptune in Virgo 1928–43: Mars in TaurusNeptune in Virgo 1928–43: Mars in GeminiNeptune in Virgo 1928–43: Mars in CancerNeptune in Virgo 1928–43: Mars in LeoNeptune in Virgo 1928–43: Mars in VirgoNeptune in Virgo 1928–43: Mars in LibraNeptune in Virgo 1928–43: Mars in ScorpioNeptune in Virgo 1928–43: Mars in SagittariusNeptune in Virgo 1928–43: Mars in CapricornNeptune in Virgo 1928–43: Mars in AquariusNeptune in Virgo 1928–43: Mars in Pisces — forms itNeptune in Libra1942–57Neptune in Libra 1942–57: Mars in Aries — forms itNeptune in Libra 1942–57: Mars in TaurusNeptune in Libra 1942–57: Mars in GeminiNeptune in Libra 1942–57: Mars in CancerNeptune in Libra 1942–57: Mars in LeoNeptune in Libra 1942–57: Mars in VirgoNeptune in Libra 1942–57: Mars in LibraNeptune in Libra 1942–57: Mars in ScorpioNeptune in Libra 1942–57: Mars in SagittariusNeptune in Libra 1942–57: Mars in CapricornNeptune in Libra 1942–57: Mars in AquariusNeptune in Libra 1942–57: Mars in PiscesNeptune in Scorpio1955–70Neptune in Scorpio 1955–70: Mars in AriesNeptune in Scorpio 1955–70: Mars in Taurus — forms itNeptune in Scorpio 1955–70: Mars in GeminiNeptune in Scorpio 1955–70: Mars in CancerNeptune in Scorpio 1955–70: Mars in LeoNeptune in Scorpio 1955–70: Mars in VirgoNeptune in Scorpio 1955–70: Mars in LibraNeptune in Scorpio 1955–70: Mars in ScorpioNeptune in Scorpio 1955–70: Mars in SagittariusNeptune in Scorpio 1955–70: Mars in CapricornNeptune in Scorpio 1955–70: Mars in AquariusNeptune in Scorpio 1955–70: Mars in PiscesNeptune in Sagittarius1970–84Neptune in Sagittarius 1970–84: Mars in AriesNeptune in Sagittarius 1970–84: Mars in TaurusNeptune in Sagittarius 1970–84: Mars in Gemini — forms itNeptune in Sagittarius 1970–84: Mars in CancerNeptune in Sagittarius 1970–84: Mars in LeoNeptune in Sagittarius 1970–84: Mars in VirgoNeptune in Sagittarius 1970–84: Mars in LibraNeptune in Sagittarius 1970–84: Mars in ScorpioNeptune in Sagittarius 1970–84: Mars in SagittariusNeptune in Sagittarius 1970–84: Mars in CapricornNeptune in Sagittarius 1970–84: Mars in AquariusNeptune in Sagittarius 1970–84: Mars in PiscesNeptune in Capricorn1984–98Neptune in Capricorn 1984–98: Mars in AriesNeptune in Capricorn 1984–98: Mars in TaurusNeptune in Capricorn 1984–98: Mars in GeminiNeptune in Capricorn 1984–98: Mars in Cancer — forms itNeptune in Capricorn 1984–98: Mars in LeoNeptune in Capricorn 1984–98: Mars in VirgoNeptune in Capricorn 1984–98: Mars in LibraNeptune in Capricorn 1984–98: Mars in ScorpioNeptune in Capricorn 1984–98: Mars in SagittariusNeptune in Capricorn 1984–98: Mars in CapricornNeptune in Capricorn 1984–98: Mars in AquariusNeptune in Capricorn 1984–98: Mars in PiscesNeptune in Aquarius1998–2012Neptune in Aquarius 1998–2012: Mars in AriesNeptune in Aquarius 1998–2012: Mars in TaurusNeptune in Aquarius 1998–2012: Mars in GeminiNeptune in Aquarius 1998–2012: Mars in CancerNeptune in Aquarius 1998–2012: Mars in Leo — forms itNeptune in Aquarius 1998–2012: Mars in VirgoNeptune in Aquarius 1998–2012: Mars in LibraNeptune in Aquarius 1998–2012: Mars in ScorpioNeptune in Aquarius 1998–2012: Mars in SagittariusNeptune in Aquarius 1998–2012: Mars in CapricornNeptune in Aquarius 1998–2012: Mars in AquariusNeptune in Aquarius 1998–2012: Mars in PiscesSource: NASA JPL DE440 ingressesastrohot.com

Born 1955–70, with Neptune in Scorpio? Then a partner’s Mars in Taurus makes the opposition.

To check it by degree: Neptune at 10° Virgo makes the opposition with Mars anywhere from 2° to 18° of Pisces — the 180° angle give or take 8°. The chart goes by sign, but the opposition also forms across a sign line: Neptune at 1° Virgo and Mars at 29° Aquarius are 178° apart, a quincunx by sign.

Years are first entry to final exit, so neighboring rows overlap where Neptune stepped back on a retrograde. Source: NASA JPL DE440.

Between two people

What does Mars opposition Neptune mean in synastry?

Desire and dreams on opposite sides. The Mars person acts; the Neptune person imagines, and each projects onto the other — the hero, the muse, the disappointment. Attraction can be strong and romantic, with a recurring pattern of chasing and slipping away. It works best when both are honest about what they want and the relationship is checked against reality regularly.

The usual mistake

Where does Mars opposition Neptune usually go wrong?

Chasing and slipping away: the Mars person pursues an ideal, the Neptune person retreats from being pinned down, and both blame the other.

Over time

How Mars opposition Neptune plays out over time

  1. Early on. The Mars person is captivated by the Neptune person's elusiveness and keeps trying to pin it down.
  2. Under pressure. Each projects hero or disappointment onto the other.
  3. Years in. Couples who last see each other clearly and stop chasing images.

Mars and Neptune at other angles

At any angle: One person's Mars — drive, desire and anger — meets the other's Neptune — dreams, ideals and evasion. Energy and imagination combine, which can inspire romance and art or dissolve into confusion about what either person actually wants.

The opposition among the Mars–Neptune angles, % of couples
The opposition among the Mars–Neptune angles, % of couples The opposition among the Mars–Neptune angles, % of couples: Sextile 60° 6.21%, Square 90° 9.19%, Trine 120° 8.8%, Opposition 180° 4.51%. Sextile 60°Sextile 60°: 6.21%6.21%Square 90°Square 90°: 9.19%9.19%Trine 120°Trine 120°: 8.8%8.8%Opposition 180°Opposition 180°: 4.51%4.51%Source: AstroHot simulation, 3 million pairs, NASA JPL DE440astrohot.com Sextile 60°Sextile 60°: 6.21%6.21%Square 90°Square 90°: 9.19%9.19%Trine 120°Trine 120°: 8.8%8.8%Opposition 180°Opposition 180°: 4.51%4.51%Source: AstroHot simulation, 3 million pairs, NASA JPL DE440astrohot.com
Square 90° · 9.19% of couples Trine 120° · 8.8% of couples Sextile 60° · 6.21% of couples

Next to Mars opposition Neptune in our list of 382, which runs from the most asked-about down.

Uranus opposition Venus 180° · 4.41% of couples Pluto trine Sun 120° · 8.88% of couples Ascendant square Moon 90° · 8.88% of couples Ascendant trine Venus 120° · 8.89% of couples

Cite this page

AstroHot. “Mars Opposition Neptune in Synastry: Meaning and Rarity.” Accessed October 28, 2026. https://astrohot.com/synastry/aspects/mars-opposition-neptune/

For Wikipedia {{cite web |title=Mars Opposition Neptune in Synastry: Meaning and Rarity |url=https://astrohot.com/synastry/aspects/mars-opposition-neptune/ |website=AstroHot |access-date=2026-10-28}}