Moon Sign Tracker Screensaver
The Moon Sign Tracker screensaver shows the real zodiac sign the Moon currently occupies. It is free, runs in your browser, and ESC exits.
How the Moon Sign Tracker screensaver works
The saver computes the Moon's real geocentric ecliptic longitude right now.
That real longitude determines its current zodiac sign and exact degree.
The saver scans forward to find the real moment the Moon changes sign.
Everything is computed locally — no network, no key.
A worked example
The Moon moves through roughly one real sign every two and a half days, faster than any other body in the sky.
Settings & tips
- The Moon changes sign more often than any other body — about every 2.5 days.
- Accent recolours the sign glyph and readout.
- This differs from the existing Phase of the Moon saver, which shows illumination.
Frequently asked questions
- Is this a real position?
- Yes — computed from a real simplified lunar ephemeris, not a lookup table.
- How often does the Moon change sign?
- About every 2.5 real days, since it circles the zodiac in roughly 27.3 days.
- Is a key needed?
- No. Everything is computed locally in your browser.
- Is it free?
- Yes — free, no download, in your browser.