Ten Million marriages

Objective:   to detect any tendency for people to attract or repel prospective partners according to their sun sign, based on birth data related to married couples.  The study was designed to look for evidence that any combination of sun signs was found more or less often than would be expected to occur by chance

Method:  access to thedata gathered by the Office for National Statistics for the 2001 census in England and Wales was achieved. The data were related to more than 10 million marriages.  Two tables were drawn up 1)  cross-tabulation of sun signs of married partners   2)  full distribution of couples by day and month of birth, with further breakdown into broad age group (of the husband)  


Table no 1  revealed a very small, but statistically significant tendency for people to marry partners of the same sun sign (22,100 couples more than  expected).  There also appeared to be some affinity between neighboring signs (26,900 couples more than expected). 

The partial overlap between astrological signs and month of birth enabled a comparison between the probability of being married to somebody belonging to the same sun sign and the probability of being married to somebody born in the same month.  Table no 2 showed that when data were aggregated by month, the apparent “month effect” was greater than the “sun sign effect”, with 23,450 couples more than expected. 

The number of couples who had the same birthday was 41% higher than expected (39,800 vs 28,300).    This was believed to be due to a response error.  Response errors, imputing errors and response artefacts were found to explain the reported differences.

In conclusion,  astrological sun sign has no impact on the probability of marrying someone of any other sign.

Does this study prove that astrology is false?

YES, it does – at least in terms of sun sign astrology related to compatibility of couples. The sample size was so large that any small difference would have been detected and the comparison with a reference group (people born in the same month) actually showed that the “month effect” was larger than the “sun sign effect”.  Moreover, there is no reason to believe that marriages in the UK are not representative of other populations – at least in the West. Finally, even if the response, imputing errors and response artefacts were not to be considered, neighboring signs are considered to be incompatible according to traditional Western astrology and would therefore not be expected to marry.

NO, it does not.  Compatibility is not assessed only on the basis of sun signs.  On the contrary, the moon signs  are considered to be the most important factor in Vedic astrology and  the interaction between planets in Vibrational Astrology. 

Link to the paper online