Astrology fundamentals
Astrological Aspects
Aspects are the geometric angles between planets in a chart — the angles that describe how planetary energies interact, conflict, support, and transform each other. Understanding aspects is essential to reading any birth chart, transit, or synastry comparison.
The 5 major aspects
Conjunction
intenseTwo planets merge at the same point — maximum focus and intensity.
Trine
harmoniousSame-element planets in effortless flow — natural talent and grace.
Square
challengingSame-modality planets in productive friction — the tension that drives growth.
Opposition
polarizingPlanets at opposite ends of the chart — polarity demanding conscious balance.
Sextile
supportiveCompatible-element planets in cooperative stimulation — opportunity awaiting activation.
Most searched combinations
High-volume searches like “Venus conjunct Mars synastry” — explore these in each aspect's key combinations section.
In natal charts
Natal aspects describe the ongoing relationship between two planetary functions throughout a person's life — areas of natural talent (trines), persistent challenge (squares), and creative tension requiring integration (oppositions).
In transits
Transiting aspects occur when a moving planet forms an angle with a natal planet. They describe current planetary influences: windows of opportunity (sextiles, trines), periods of challenge and growth (squares), and major restructuring (oppositions).
In synastry
Synastry aspects describe how one person's planetary energies interact with another's. Conjunctions merge functions; trines create easy mutual support; squares create productive friction; oppositions create the polarity of intense attraction and growth.
Aspect orbs reference
An “orb” is the allowable degree of separation from exactness — within which an aspect is considered active. Tighter orbs indicate stronger aspects.
| Aspect | Angle | Orb | Nature |
|---|---|---|---|
| Conjunction | 0° | 8° | intense |
| Trine | 120° | 8° | harmonious |
| Square | 90° | 8° | challenging |
| Opposition | 180° | 8° | polarizing |
| Sextile | 60° | 6° | supportive |
See all aspects in your natal chart
Astrelle calculates every major and minor aspect in your birth chart, explains what each means for your personality and life path, and shows how current transits are activating your chart right now.
Get your free chart on Astrelle