As above, so below

The ancient clockwork of the stars and celestial bodies

Sideric means “stellar”.

True Sidereal Astrology refers to astronomy, so not only 30° degrees per sign are used, but the exact sign length.

Here is a list of when the sun passes through each zodiac sign, adjusted for the year 2026:

Aries 22.4.- 12.5.
Taurus 12.5.- 19.6.
Gemini 20.6.- 20.7.
Cancer 21.7.- 7.8.
Leo 8.8.- 15.9.
Virgo 16.9.- 5.11.
Libra 6.11.- 23.11.
Scorpio 24.11.- 6.12.
Ophiuchus 7.12.- 19.12
Sagittarius 20.12.- 20.1.
Capricorn 21.1- 15.2.
Aquarius 16.2. -10.3.
Pisces 11.3.- 21.4.

The colors are adapted to Truesky's horoscope display
(as you can see, the signs are different sizes):

Frequently asked questions

What is different from Western Astrology?

The constellations in the sky no longer correlate with the Western Zodiac Signs, as these were fixed to days and seasons rather than the actual constellations. Since the Gregorian calendar is not an exact lunar calendar, it shifts every year.

For example, the Western Zodiac begins with the equinox in March with the sun in Aries. In the actual sky, however, the sun is still in the zodiac sign of Pisces. The Western Zodiac describes symbolic cycles, and True Sidereal Astrology shows the visible sky.

Do you have a calculator online that you use?

No, because True Sidereal Astrology uses the actual length of the zodiac signs as the basis for its calculations, and Vedic Astrology uses the same length for each sign—30°. Furthermore, Vedic Astrology uses a completely different house system.

Why do so few people know about it?

As in Western Astrology, I use the Placidus House System, so the positions of the celestial bodies in relation to each other and in relation to the houses are identical to those in Western Astrology, and there are therefore many similarities. For example, the positions of the planets in relation to each other and in the houses.

More and more people have at least heard of it.
However, many people identify strongly with a few signs in their horoscope, making it very difficult to change their minds, especially if they have been involved with Western Astrology for a long time.

Which house system do you use?

Which sign do most people prefer to keep?

The most difficult thing for people born between January 21 and February 15 is the “transition” from Aquarius to Capricorn. Some also find it very difficult to let go of Sagittarius or Scorpio.

What is the 13th sign of the zodiac?

The Snakecarrier, Ophiuchus, is the 13th sign of the zodiac, which has been omitted in Western, Vedic, and Sidereal Astrology. The sun passes through it between December 7 and 19, and it is a hybrid of water and fire, death and rebirth.

Yes, fortunately lately there is the one and only online website I can recommend:
Make an account and dont forget to switch from „Tropical“ to „Midpoint Sidereal“.
https://truesky.masteringthezodiac.com/