Sun-sign compatibility · two earth signs · the same sign
Capricorn and Capricorn compatibility
Two Capricorn Suns are a conjunction by sign: the same element, earth, the same modality, cardinal, and the same month of the year. Astrology reads the same sign as the angle of likeness, and the pairing as the one in which two people recognise themselves in each other first.
This year the Sun is in Capricorn from 21 December to 20 January, so both people were born in the same few weeks of the year, in whatever years. 6 famous couples in StarMap's dataset are two Capricorn Suns, where chance would give about 4.4: Bradley Cooper and Irina Shayk, R. Kelly and Aaliyah and Jude Law and Sienna Miller among them. Among the 537 couples with both Sun signs certain, that makes this the 52nd most common pairing of the 78. A Sun sign is one placement of ten, and the two whole charts say far more than the two signs.
Each sign has its own page: Capricorn, with its dates to the minute, its traits and the famous people born under it.
What astrology reads for Capricorn and Capricorn
Two people with the Sun in the same sign share a way of being seen. Astrology reads the Sun as the part of a person that wants to be recognised, and when two Suns sit in one sign each already understands what the other is asking for: the same kind of praise, the same kind of attention, the same idea of what a good day looks like. The first weeks tend to feel like being understood without explaining.
The tradition is also candid about the cost. What two people share they also compete over, and a pair with the same Sun sign can find that the thing they both want most is the thing there is only one of in the room. The reading is that the sign's strengths are doubled and so are its blind spots, and that the rest of the two charts, the Moons and the rising signs above all, decides whether the likeness feels like company or like a mirror.
Two earth signs
Two earth signs are read as two people who measure a relationship by what it builds. The tradition reads the pairing as steady, practical and slow to change: both tend to show care by doing rather than saying, both prefer a plan to a surprise, and both find it easy to make a shared life that works. The reading's caution is that two careful people can keep each other careful, and that the pair may need to be shown where the fun is.
Two cardinal signs
Both signs are cardinal, the starting signs of their seasons, and the tradition reads two cardinal people as two leaders in one relationship: both want to set the direction, and the question is who goes first on which day. The reading is of a pair that gets a great deal started and has to decide on purpose who finishes.
These are readings of the Sun signs alone, written for reflection and entertainment. They describe tendencies the tradition assigns to an angle, not two people, and they do not say whether a pair lasts.
Capricorn in love
Capricorn
In love, Capricorn is slow, careful and then constant. It shows commitment by showing up, year after year, and it finds romance easier to practise than to declare. Its lesson is that a partner wants to be let in, not only provided for.
468 famous people have the Sun in Capricorn for certain: every Capricorn Sun, each with a birth chart.
Famous Capricorn and Capricorn couples
Of the 537 spouse and partner pairs in StarMap’s dataset whose Sun signs are both certain, 6 are two Capricorn Suns. From the share of each sign among every couple’s members, chance alone would give about 4.4, a ratio of 1.37, which makes this the 52nd most common pairing of the 78. Their sky match, from the angles between the two charts, averages 75 out of 100 against 67 for every couple counted. With about seven couples a cell, a ratio between a half and double is what chance produces; the counts describe the dataset, not the signs.

71Bradley Cooper and Irina Shayk
Listed as partners, 2015 to 2019

79R. Kelly and Aaliyah
Married in 1994 · marriage ended in 1995

74Jude Law and Sienna Miller
Listed as partners, 2003 to 2011

76Orlando Bloom and Kate Bosworth
Listed as partners until 2006

70Ellie Goulding and Skrillex
Listed as partners in 2012

77Meghan Trainor and Daryl Sabara
Married in 2018
All famous couples, each scored from both birth charts.
Both signs in one chart
A chart with the Sun and the Moon both in Capricorn belongs to someone born near a new Moon in Capricorn season: the sign's way of being seen and its way of feeling are the same.
Sun in Capricorn, Moon in Capricorn: 27 famous people
Only people whose Sun and Moon signs do not depend on an unknown birth time are counted. The Moon in Capricorn has a page of its own.
Questions people ask
Are two Capricorn Suns compatible?
By Sun sign alone, astrology reads two Capricorn Suns as a conjunction: the same element and modality, with the sign's strengths doubled and its blind spots too. That is a reading of one placement of ten and not a verdict on two people. In StarMap's dataset of famous couples, 6 are two Capricorn Suns, against about 4.4 that chance would give, a ratio of 1.37. The angles between two whole charts, Moon to Moon and Venus to Mars among them, say more than the Sun signs can; the comparison is free on StarMap.
How many famous couples are two Capricorn Suns?
6 of the 537 couples in StarMap's dataset with both Sun signs certain, Bradley Cooper and Irina Shayk, R. Kelly and Aaliyah and Jude Law and Sienna Miller among them. Chance alone would give about 4.4, which makes it the 52nd most common pairing of the 78. Their sky match, from the angles between the two charts, averages 75 out of 100 against 67 for every couple counted.
Who has the Sun and the Moon both in Capricorn?
27 people in StarMap's dataset have the Sun in Capricorn and the Moon in Capricorn, Federico Fellini, Ahmed Ben Bella and Ram Narayan among them. The Moon's sign depends on the day and often on the hour of birth, so only people whose Moon sign is certain are counted.
Sun signs are computed from the Sun’s position with the astronomy-engine ephemeris, checked against Swiss Ephemeris, in the tropical zodiac. Birth data and relationship data come from Wikidata; birth times, where StarMap has one, from Astro-Databank with their Rodden rating. A couple is counted only when the Sun was in one sign for the whole of each birth date. Readings describe what the tradition assigns to an angle, for entertainment and self-reflection; StarMap predicts nothing. Compare two whole charts.
Photo credits (15 photos from Wikimedia Commons)
Each link opens the photo’s page on Wikimedia Commons, which states its author and licence.