Four aspects, all involving Venus or Mars, and nothing else registers.
Charge only
Low in the range for contact across 93 pairs charted (29–86, median 41).
Laura Dern and Renny Harlin compatibility
↓ Below: all 4 aspects named, with orbs
Confirmed by the person or someone close to them: full chart shown, including houses and the rising sign.
Note on this rating: Birth date 1959-03-15 from Wikidata Q318712 (day precision) and the English Wikipedia article, which agree. Birth city Riihimäki, Finland from Wikidata P19. Birth time unknown, so Rodden X and the time is an estimate.
This page compares Sun, Mercury, Venus and Mars, the four placements a birth date alone can place. Moon, Ascendant and Midheaven are left out here by design, not by omission, so nothing on this page is scored against a birth time it cannot trust.
Cross-aspects
Where the two charts actually touch
Category shape
Five categories, one chart each
Attraction
VENUS × MARS
live spark, from Laura Dern's Venus square Renny Harlin's Mars
85
Identity
SUN × SUN
No aspect inside orb. Their core identities read independently of each other here.
None
Communication
MERCURY × MERCURY
No aspect inside orb. This engine finds no direct communication channel between them.
None
Friction
MARS × MARS
No aspect inside orb. No built-in friction point shows up between the two Mars placements.
None
Values
VENUS × VENUS
No aspect inside orb. Their values neither align nor clash by this measure.
None
Scores rank how close a contact is to exact, not how well two people get along. A high friction score means the two Mars are in tight aspect, which is information, not a warning.
The overlap
Two charts, laid over each other
Laura Dern and Renny Harlin's Sun, Mercury, Venus, Mars and Moon are drawn here, along with the house ring and ascendant axis both charts support. This is a complete chart of what is known, not a partial chart of what is not.
| Thin line, Sun to Venus | SEXTILE 1.78° |
| Thick line, Venus to Mars | SQUARE 2.20° |
| House ring, drawn | |
Why they click
Every contact here runs between Venus and Mars, or from a Sun into one of them. Sun sextile Venus at 1.78 is the tightest and the friendliest. Attraction scores 85, well clear of everything else in this chart, built on Venus square Mars and Mars opposite Venus working the same pairing from both directions.
Why they clash
Identity, communication, friction and values all sit at the floor. There is no Sun-to-Sun contact, no Mercury contact of any kind, and nothing linking what either person thinks matters. Four aspects, all in one register. On this scale the chart describes chemistry with no scaffolding around it.
What each system says
Twelve systems, two people
The Suns are 32.8° apart, outside orb of any aspect, which is why identity reads as an empty channel above.
Goat and Pig are in neither the trines nor the clashes.
Frequently asked
Are Laura Dern and Renny Harlin astrologically compatible?
Their charts make 4 cross-aspects, the tightest at 1.78° and 2.2°. Astrology does not score a relationship out of a hundred, and the number on this page counts how much contact two charts make, not how well two people do.
What does sextile mean between two charts?
A sextile puts two placements in a supportive relation that usually needs some initiative to activate. Laura Dern and Renny Harlin have one sextile between them.
Tight contact, mixed valence
Run the full synastry
This page compares Sun, Mercury, Venus and Mars, because those are the four that a birth date alone can place. The synastry calculator runs all ten bodies against each other.