So I once had this get rich quick scheme where I was going to offer to do a quick and dirty romance compatibility astrological thing and market it to heterosexual women, in part because it's usually women who are into astrology and in part because this logistically works better for a potential hetero relationship if the person snooping is the woman rather than the man.
As noted previously, the Sun moves roughly one degree each day of the year, ergo all you need is someone's birthday -- Month and Day -- to know where their Sun is in their chart to within about a degree. You do NOT need a birth year and you do NOT need a place of birth.
This is significant because aspects are considered exact if it is within one degree of exact. NO OTHER astrological body will get you this level of accuracy from JUST knowing the birthday.
The Moon changes signs like every 2.5 days, so every two to three days, you may not even know what SIGN it is in. The Rising Sign changes signs every TWO HOURS. Without a place and time of birth, you won't find it.
Sun, Moon and Rising Sign are the big three in a chart. The Sun is the only one you can get useful info about with just knowing someone's birthday.
Birthdays get celebrated, so this is casual information that you may have about someone you do not know well. So you don't need to ADMIT you are trying to figure out if they would be compatible romantically and you don't need to ask suspicious questions, you may know this because, say, you saw their sister wish them "happy birthday" on Twitter.
Generally speaking, when looking at a heterosexual relationship, you look at HIS Sun and Mars and HER Moon and Venus to get a quick and dirty idea of romantic or sexual compatibility. Since you need more than just a birthday to find the Moon position, this doesn't work if a heterosexual man is trying to figure out quick and dirty compatibility with a woman he knows where he only knows her birthday.
Why on earth anyone would PAY for this service, I don't know. You can generate a free chart via various online services and if you are savvy enough to have your natal chart, I don't see why you wouldn't just look up the degree of his Sun via one of those services.
What if you are GAY or TRANS or NONBINARY or....?
I have no clue. All the astrological texts I have ever seen have been heteronormative. Someone should look at charts of actual LGBTQ people and create a database and figure out what to look at for quick and dirty compatibility for people who aren't cis het types.
Do note that this means SUN SIGN "compatibility charts" that say, essentially "Air and Fire signs get along well with Air or Fire signs; Earth and Water signs get along well with Earth or Water signs" works for basically FRIENDSHIP between two people where you know their Sun Sign.
This compatibility framework STILL applies in this instance as a GENERAL rule of thumb but applies to, say, HIS Sun and HER Moon or HIS Mars and HER Venus rather than Sun Signs per se. If HIS Sun and HER Moon are both Air/Fire or Earth/Water, that's generally a good start (though this gets weird for late or early sign positions because you can have aspects just OVER the border in the next sign at that point).
Last but NOT LEAST:
Please, please, PLEASE do NOT look at such info and talk yourself into believing THIS IS FATE. Like the psychic chic said in Minority Report: You still have a choice. You can CHOOSE.
If you LIKE someone and want to spend time with them and get to know them, do that. Try to use astrology to understand the WAY you interact and help you do that more effectively.
If you are inclined to believe in some Greek Tragedy style of some INESCAPABLE FATE -- like I felt trapped in during my youth -- I strongly encourage you to do what I did and GET THERAPY.
I've had relationships to men who had "fate aspects" to my chart -- aka exact aspects between their Sun and my Moon or Venus -- and some of those were important relationships for me and some lasted a long time. And they are also ALL IN THE PAST and over with. I eventually left all of them.
Because I still had a choice and I made a choice.
As noted previously, the Sun moves roughly one degree each day of the year, ergo all you need is someone's birthday -- Month and Day -- to know where their Sun is in their chart to within about a degree. You do NOT need a birth year and you do NOT need a place of birth.
This is significant because aspects are considered exact if it is within one degree of exact. NO OTHER astrological body will get you this level of accuracy from JUST knowing the birthday.
The Moon changes signs like every 2.5 days, so every two to three days, you may not even know what SIGN it is in. The Rising Sign changes signs every TWO HOURS. Without a place and time of birth, you won't find it.
Sun, Moon and Rising Sign are the big three in a chart. The Sun is the only one you can get useful info about with just knowing someone's birthday.
Birthdays get celebrated, so this is casual information that you may have about someone you do not know well. So you don't need to ADMIT you are trying to figure out if they would be compatible romantically and you don't need to ask suspicious questions, you may know this because, say, you saw their sister wish them "happy birthday" on Twitter.
Generally speaking, when looking at a heterosexual relationship, you look at HIS Sun and Mars and HER Moon and Venus to get a quick and dirty idea of romantic or sexual compatibility. Since you need more than just a birthday to find the Moon position, this doesn't work if a heterosexual man is trying to figure out quick and dirty compatibility with a woman he knows where he only knows her birthday.
Why on earth anyone would PAY for this service, I don't know. You can generate a free chart via various online services and if you are savvy enough to have your natal chart, I don't see why you wouldn't just look up the degree of his Sun via one of those services.
What if you are GAY or TRANS or NONBINARY or....?
I have no clue. All the astrological texts I have ever seen have been heteronormative. Someone should look at charts of actual LGBTQ people and create a database and figure out what to look at for quick and dirty compatibility for people who aren't cis het types.
Do note that this means SUN SIGN "compatibility charts" that say, essentially "Air and Fire signs get along well with Air or Fire signs; Earth and Water signs get along well with Earth or Water signs" works for basically FRIENDSHIP between two people where you know their Sun Sign.
This compatibility framework STILL applies in this instance as a GENERAL rule of thumb but applies to, say, HIS Sun and HER Moon or HIS Mars and HER Venus rather than Sun Signs per se. If HIS Sun and HER Moon are both Air/Fire or Earth/Water, that's generally a good start (though this gets weird for late or early sign positions because you can have aspects just OVER the border in the next sign at that point).
Last but NOT LEAST:
Astra inclinant, sed non obligant.Or in English: The stars incline us. They do not bind us.
Please, please, PLEASE do NOT look at such info and talk yourself into believing THIS IS FATE. Like the psychic chic said in Minority Report: You still have a choice. You can CHOOSE.
If you LIKE someone and want to spend time with them and get to know them, do that. Try to use astrology to understand the WAY you interact and help you do that more effectively.
If you are inclined to believe in some Greek Tragedy style of some INESCAPABLE FATE -- like I felt trapped in during my youth -- I strongly encourage you to do what I did and GET THERAPY.
I've had relationships to men who had "fate aspects" to my chart -- aka exact aspects between their Sun and my Moon or Venus -- and some of those were important relationships for me and some lasted a long time. And they are also ALL IN THE PAST and over with. I eventually left all of them.
Because I still had a choice and I made a choice.