Astrology · Free tool · Solar return
Your year-ahead, in a chart.
Once a year, the Sun returns to its natal degree. The chart cast for that moment — your solar return — is the year ahead in geometric form: fresh angles, the Moon in a new sign, every other planet recomposed. Free, computed at arcsecond precision. Relocation supported.
Solar returns sit alongside profections and current transits as the modern Western year-ahead reading. The SR Ascendant is the year’s lens; the SR Sun’s house is the year’s activated life arena; the SR Moon shows where emotional weight falls. Hellenistic practice layers all three together: profection for the topic, SR for the year-shape, transits for the moment.
For the topic of your year (Lord-of-the-Year and the activated whole-sign house) see annual profections. For live transits to the chart you cast here, see the transit forecast.
Common questions
About the solar return
What is a solar return chart?
Once a year — give or take six hours from your birthday — the Sun returns to the exact ecliptic degree it occupied at your birth. The chart cast for that exact moment is your solar return. It's a fresh natal-shape geometry valid for the twelve months that follow. Modern Western practice and Hellenistic practice both use SR charts as a year-ahead reading.
How does the SR differ from natal?
Your natal chart never changes — same Sun, Moon, Rising forever. The SR chart shifts each year because the Moon has moved and the angles (Asc / MC) depend on the time and location of the return moment. The SR Sun is always in the same sign and degree as your natal Sun (that's the definition); everything else recomposes.
What is a relocation solar return?
An optional variant: cast the SR chart at a different location than your birth city. The angles (Asc, MC) shift because they're location-dependent; the planetary positions don't. Some practitioners advocate consciously moving for the year-ahead window to a city whose SR Ascendant lands favourably for the year's intent — a 'relocation SR for travel' practice. We support it; whether to take the strong claim seriously is up to you.
How do I read it?
Three handles: the SR Ascendant sets the lens for how you'll meet the year. The SR Sun's house tells you the life arena that activates most strongly. The SR Moon shows where emotional weight sits this year. Beyond that, every SR planet's house overlay (vs natal) and any tight SR-to-natal aspects refine the read. Pair with annual profections (Hellenistic timing, names the topic) and current transits (the moment) for a three-part year reading.
Why is this free?
Solar return is a calculation. Relocation SR is also a calculation. Modern Western competitors (Astro-Seek, Astro.com) give these away free already; Calibrate's value is interpretation — the year-ahead read grounded in which timing techniques actually fit your life — not the math underneath.
How accurate is the moment?
Arcsecond. The engine solves for Sun ecliptic longitude = natal Sun longitude using VSOP87D. The return moment is exact to seconds; we display it rounded to the minute in your browser's time-zone.
Computation
The return moment is computed by solving Sun ecliptic longitude = natal Sun longitude with VSOP87D. The chart at that moment is cast from the same first-principles ephemerides used by the free Birth Chart tool. Houses default to Placidus; relocation SRs recompute angles at the override location while keeping planetary positions stable (positions are universal at a moment in time — location only changes the angles).