FAQ

Yes, the local time displayed on the site updates every 30 seconds without requiring you to refresh the page.

Yes. If your device goes offline, the clock automatically switches to your device’s local time.

Yes, with one limitation: place lookup by name needs internet. When offline, enter coordinates in the format (lat)xx.xxx,(lon)yy.yyy — e.g., 40.713,-74.006. This works completely offline.

Yes. Your birth data (date, time, and location) is saved locally in your browser using localStorage.

Local: use for modern birth times (timezone/DST applied). UTC: only if your input time is already UTC/UT. LMT: for historical births using local mean time by longitude.

Swiss Ephemeris is used by default for maximum precision — the same high‑accuracy astronomical engine used in professional astrology software. If Swiss cannot load, the app automatically falls back to Local mode so it always works.

After Swiss Ephemeris is downloaded once, it is stored offline by your browser’s cache (and the service worker). It won’t re‑download unless you clear browser storage. Learn more on Swiss Ephemeris (precision & WASM).

Tropical, Sidereal (KP/Lahiri), and True Sidereal — MTZ (with Ophiuchus). Switch in Settings → Zodiac system. See Zodiac Systems.

Tropical: tied to seasons and the March equinox; Sidereal: anchored to star constellations. The difference (ayanamsa) is ~24° in recent years — subtract ~24° from tropical positions to approximate sidereal. Deep dive: Tropical vs Sidereal.

The angular difference between tropical and sidereal zodiacs caused by precession. Lahiri: ~24°07′ in 2025, increasing ~50″/year (~1° per 72 years); full cycle ≈ 25,920 years.

True Sidereal uses constellation midpoints to define sign boundaries (non‑uniform widths). Because the ecliptic crosses Ophiuchus, it is included as a genuine segment. Learn more: True Sidereal (MTZ midpoint).

Whole Sign: each sign is a full house. Equal (from Asc degree): 30° houses from the Ascendant degree. Placidus: time‑based, unequal houses; common in Western astrology (requires Swiss).

Sidereal: ~27.3 days relative to fixed stars (ascending/descending arcs). Synodic: ~29.5 days from new moon to new moon, with eight familiar phases.

Strong: energy flows constructively; virtues are accessible. Weak: energy is blocked/distorted; may express as compensatory extremes while seeking balance.

Apparent backward motion; energy turns inward/reflective. Re‑entries across sign boundaries are logged as new entry dates (you may see multiple entries/exits across a single transit).

Direct + strong: outward, constructive. Retrograde + strong: constructive but inward (self‑analysis). Direct + weak: compensatory/imbalanced. Retrograde + weak: doubly blocked; inner conflict/overcompensation.

☌ 0° (conjunction), ⚹ 60° (sextile), □ 90° (square), △ 120° (trine), ☍ 180° (opposition). Number = orb (distance from exact); smaller = stronger. ↑ applying (tightening), ↓ separating (loosening).

≤ –7 critical; –6…–3 difficult; –2…–1 friction; 0 neutral; +1…+3 positive; ≥ +4 very positive.

Natal: dignity/retrograde/natal aspects → baseline. Current Transits: transiting influences + your baseline. Zeitgeist: aggregate of transit‑to‑transit aspects for the collective climate.

They reference the same active Transit→Natal aspects but apply different weights. Money risk penalizes confusion/impulsiveness/retrogrades more (costly mistakes). Life risk emphasizes timing and action tolerance.

The initial download includes the Swiss Ephemeris engine (WebAssembly) and data files. Afterwards, they’re cached and won’t download again unless you clear storage.

Enter lat,lon like 40.713,-74.006 (decimal degrees). For S/W, use negative values (e.g., -33.868,151.209).

All personal chart inputs stay in your browser (localStorage). AstroClock does not upload your birth data or chart settings to a server.