Is astrology real?
Written by AI from saved sources. A script checks every quote word for word, and a second AI compares each claim with its source. How we work and corrections
The tests cited here have not established astrology as reliable for describing personality. Descriptions can feel accurate. People report using astrology and related practices for enjoyment or insight.
Checked against: Carlson’s personality tests, Dean–Kelly’s review, Barberia’s Barnum study, October 2026.
Why people believe it
A reading can feel remarkably personal even when its words fit many people. Historian Nicholas Campion suggests astrology offers belonging and purpose. This is an explanation of its appeal, not a measured cause.
Pew’s 2025 report found that 28% of U.S. adults consulted astrology or horoscopes at least yearly. The motive figures below combine astrology, tarot and fortune-telling. Of all U.S. adults, 20% reported mainly seeking fun and 10% helpful insights. Those motives are not astrology-only figures.
“Can my birth chart describe me?”
Shawn Carlson’s 1985 study tested whether birth charts accurately described personality. BBC Earth reports on astrologers matching charts with personality profiles, or descriptions of personality. They did not perform statistically better than random choice. Critic Suitbert Ertel disputes Carlson’s analysis. But he says his reanalysis (a fresh look at the data) does not verify astrology either. The original results tables were unavailable to this pack. The finding comes through BBC’s account.
Dean and Kelly’s 2003 expanded abstract (a detailed study summary) reports negative results across 110 variables (measures). These findings concern 2,101 people born close together in time in London. Their combined analysis covers more than forty controlled studies. It suggests astrologers did not perform significantly better than chance. These findings come from study summaries. They are not an independent check of the raw data (the original study data).
“Can it guide relationships or future events?”
The Faculty of Astrological Studies describes relationship readings and choosing an ideal time to start a project. Those are practitioners’ claims. Carlson’s personality tests do not directly test either one.
“What about Mars and sports champions?”
Michel Gauquelin claimed sports champions were born with Mars rising or at its highest point. He claimed this happened much more often than for ordinary people. An American replication (a repeat study) found Mars in the relevant positions for 13.5% of 408 champions. The expected figure was 17%. The shortfall was not statistically significant.
The replication authors report that the Gauquelins claimed a positive result for a selected group of 88 athletes. They objected that the selection came after results were known. But they acknowledged having no written agreements about acceptable athlete directories (lists of athletes). This remains a dispute about selection, not established support for horoscope accuracy.
“Does my sign match the stars?”
NASA explains that Earth’s slow wobble, called precession, has changed how signs line up with constellations (star patterns). Signs divide the sky equally. Constellations have unequal sizes. OpenStax says that in most forms of astrology, signs retain their original calendar dates. A mismatch alone does not test whether a reading predicts anything accurately.
Thinking tool: would this description fit anyone?
The Barnum effect means accepting a general personality description as highly accurate and specific to you. Barberia and colleagues’ 2018 study involved psychology undergraduates. They rated the fake description’s accuracy on a 0–100 scale. Average ratings were 83.85 in the teaching intervention group and 78.62 in the control (comparison) group. These ratings were collected at the start. So they cannot show that the study’s teaching intervention worked.
For a horoscope, ask which words distinguish you from other people. For other claims, ask whether what seems to fit you would also fit almost anyone.
Official positions, separately
NASA Space Place’s article was updated 6 December 2022. It acknowledges astrology’s cultural importance but says its claims lack scientific evidence. UC Berkeley’s Understanding Science says careful tests have not supported astrological ideas. Its page is undated and was checked on 24 October 2026.
What people also ask
Can I trust astrology?
The controlled personality tests here do not establish it as reliable.
What does NASA say about astrology?
NASA separates cultural importance from scientific evidence. It says astrology’s claims lack scientific evidence.
Is there evidence to support astrology?
There are positive claims, including Gauquelin’s Mars effect. But the record of repeat studies is disputed. Dean and Kelly’s review suggests no significant advantage over chance in controlled tests.
Are there new astrological dates?
OpenStax says that in most forms of astrology, signs keep their original calendar dates. This is despite the shift relative to constellations.
Check it yourself (5 minutes)
- Open NASA Space Place’s “What Are Constellations?”.
- Find “cultural traditions”.
- Read the sentence: does acknowledging cultural importance mean endorsing scientific accuracy?
What you should have found
“While astrology is important to some cultural traditions, its claims are not based on scientific evidence.”
Before you forward this: does the box at the top say exactly what the sources below say?