An example 'chart sphere' animation.
3D Houses
Left: Classic 2D model ofhouses. Right: Accurate 3D model of houses.
- All 12 houses are the same size and always cover the same proportions ofthe local horizon.
- A planet above the horizon will always be in houses 7-12.
- A planet below the horizon will always be in houses 1-6.
- A planet east of the meridian will always be in houses 1-3 or 10-12.
- A planet west of the meridian will always be in houses 4-9.
- A planet exactly rising anywhere along the eastern horizon will always beon the boundary line between houses 12 and 1.
- A planet exactly setting anywhere along the western horizon will always beon the boundary line between houses 6 and 7.
- A planet transiting the meridian above the horizon will always be on theboundary line between houses 9 and 10.
- A planet transiting the meridian below the horizon will always be on theboundary line between houses 3 and 4.
Chart Spheres
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An example chart sphere.
Left: Chart sphere with classic 2Dhouses. Right: Chart sphere with accurate 3D houses.
Left: Campanus houses in classic 2D wheel. Right: Campanus house boundaries on celestial sphere.
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House Focused Wheel Charts
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Can a standard 2D wheel chart be better at taking into accountplanetary latitude? The answer is yes, if it is displayed in an alternativefashion.
Standard wheel charts are 'sign focused', which meansthat a planet is plotted within the wheel based only on its sign position orzodiac longitude, and its latitude is ignored. Wheel charts can instead be'house focused', which means that the graphical position of where aplanet is placed around the wheel will be its proportion through the 3D house.(In other words, the planet's proportion through the 3D house or percentageacross the prime vertical on the local horizon, will be used to position theplanet between the two appropriate house cusps on the wheel.) The result willcause planets to seem to move, or even seem to be in a different sign (howeverthey will always be in the right house). That's the reverse of a standard'sign focused' wheel which will always position planets in the rightsign (however they may be in the wrong 3D house). If one wants a graphicaldisplay accurate for both zodiac sign positions and 3D house positions at thesame time, then they should use a chart sphere.
See below for an example of 'sign focused' and'house focused' wheels displayed side by size. On the left is astandard 'sign focused' wheel. The correct zodiac position of eachplanet is indicated by the planet's positioning within the surrounding ring ofsigns. Similarly, the standard house position of each planet is indicated bythe planet's positioning within the surrounding ring of houses. However, sincethe wheel doesn't do anything with planetary latitude, the apparent house maynot be the correct 3D house. On the right is a 'house focused' wheel.The correct 3D house position of each planet is indicated by the planet'spositioning within the surrounding ring of houses. However, the sign positionof each planet isn't necessarily the positioning within the surrounding ring ofsigns. Notice how planets are positioned differently in the two wheels, usuallysubtly but sometimes significantly, especially for the fixed stars Sirius andPolaris.
Left: Standard 'sign focused'wheel. Right: Alternative 'house focused' wheel.
Note if the house system is Campanus, than switching between'sign focused' and 'house focused' for a wheel chart willresult in objects like the Sun and lunar Nodes not moving at all. That'sbecause those objects are on the ecliptic (i.e. at 0 latitude) and Campanushouses and 3D houses have the same cusp points for objects on the ecliptic.
In Astrolog, if you turn on the '3D Houses' setting,then its standard wheel chart will be displayed 'house focused'instead of 'sign focused'.
3D Aspects
'3D aspects' refers to aspect calculationsthat take planetary latitude into account. When calculating the angle and orbof aspects, in classic astrology only the zodiac position longitude of a planetis considered, and the planet's latitude is ignored. However, it's possible foraspect calculations to take the latitude of planets into account too. In otherwords, the aspect angle between two planets is determined by the 3D greatcircle distance between them on the celestial sphere, and not just the 2Ddifference between their zodiac position longitudes.
For example, during a New Moon the Sun and Moon may be as muchas 5 degrees different in latitude. That means that even when a New Moon isexact, the 3D aspect orb between them may be up to 5 degrees. (If the Sun andMoon are conjunct in both zodiac position and latitude, then a solar eclipse istaking place.) For bodies with latitudes that can be widely different from theecliptic, such as Pluto, asteroids, and especially fixed stars, the differenceis more pronounced. For example, a body at 0Leo and -30 latitude will be Squarea body at 0Leo and +60 latitude, because they're 90 degrees apart, even thoughthey’re both at the same longitude and would be considered Conjunct normally.
3D aspects suggests that an exact time New Moon in which theSun and Moon are different by 5 degrees in latitude, has the same orb orstrength as a standard Sun/Moon conjunction different in zodiac positionlongitude by 5 degrees. If you use 3D aspects, then aspect orbs will increaseby up to the latitude difference, which can cause some aspects to disappear ifthey're pushed beyond the orb limit.
'3D orbs' is a related concept to 3D aspects.3D orbs means orb limits apply to latitude as well as zodiac positionlongitude. With 3D orbs active, a Conjunction with a 5 degree orb will beconsidered out of bounds (and therefore not a valid Conjunction) if the zodiacpositions are different by more than 5 degrees, or if the latitudes aredifferent by more than 5 degrees. 3D orbs can be considered a'lighter' version of 3D aspects or 3D aspects partially applied,because no aspects will change into other aspects, however some aspects willdisappear if pushed beyond the vertical orb limit. For example, two bodies at0Leo will potentially be considered Conjunct (and never any other aspect, nomatter how much their latitudes differ) however they'll only be Conjunct iftheir latitudes are close enough to be within orb.
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3D Aspects and 3D orbs are two separate settings independent ofeach other, and one can use either or both of them. This results in fourpossible combinations, or different ways to determine aspects. Assume there'sone body at 0Leo and -30 latitude, and another body at 0Leo and +60 latitude.That results in the following aspects between them: