What do the planets say?
Some sceptics state that gravity cannot be the reason astrology works because the gravitational force from a midwife acting on a newborn baby is stronger than that of Mars. While this is true for an isolated baby and midwife floating in space, it is not an accurate reflection of reality because the midwife and the baby aren't isolated and floating alone in space. They are a part of the Earth and cannot be separated from the planet without a lot of energy in the form of rocket fuel.
An ant on a ball is a part of the ball. The ant’s mass is added to the mass of the ball. Perhaps an ant is too large? Bacteria living on a ball are a part of the ball, much like humans are a part of the planet Earth.
Human bodies are made of DNA, RNA, proteins and other many biochemicals. These are of course also part of the planet. Our cells are an organised collection of chemicals that are constantly being pulled by the gravity of the Sun, Moon, Jupiter and Saturn, but also by the various other bodies in of the Solar System. This is because all of the atoms in all of the molecules that form the planet Earth are affected by the gravitational forces from the various bodies in the Solar System. (Let's limit the discussion to the Solar System to simplify things.)
As the planets move, the directions of the various gravitational forces acting on the atoms forming the Earth also changes. The force that Jupiter exerts on the Earth is about 1.9 x 10+18 N. This means that the Earth (including us, all our cells and the atoms that form us) is pulled towards Jupiter at the rate of about 3.2 x 10-7 m.s2 (and 2.33 x 10-8 m.s2 towards Saturn).
These might seem like very small forces, but when we consider that the width of a DNA molecule is only 2 nm or 2.0 x 10-9 m, then we can see that this is not an insignificant force when considering the tiny world of atoms and molecules. In one second, Jupiter pulls the Earth’s atoms toward it by 3.2 x 10-7 m (ignoring the gravity of the Sun and other bodies for the moment). This is 100 times larger than the width of a DNA molecule.
The force that we experience from the planet Earth (the one that keeps us from floating off and away into space) is relatively constant and changes only slightly depending on your altitude and local geology (Reference). The relative constancy of the Earth’s gravity is important, because it’s the change of gravity acting on us due to the other planets that’s significant here.
Astrologers (Magi Astrologers in particular, because we only work with the aspects and do not find the Zodiac signs and Houses useful) consider specific aspects to be important. These aspects occur when the planets are 0°, 90°, 120°, 150° and 180° apart in the longitudes (both geocentric and heliocentric). These angles even have special names (Ref).
For convenience all the bodies in the Solar System are called planets in astrology, even though we know some are stars (i.e. the Sun), natural satellites (i.e. the Moon), dwarf planets (e.g. Pluto), asteroids (e.g. Vesta) and Centaurs (e.g. Chiron). What’s important is that the aspects they make (i.e. when they are a certain angle apart) are noteworthy.
Now we come to the interesting bit. The angles that astrologer consider significant correspond to similar angles found in the molecules that we’re made of. Perhaps more importantly, they also occur in the interactions between molecules. These interactions, e.g. protein folding, affect the shape of complex proteins like enzymes and these affect the expression of DNA. The expression of our genetic material affects our whole bodies, from the density of our bones and integrity of our skin, to the levels of sex and stress hormones in our blood.
In the valence shell electron pair repulsion (VSEPR - Ref.) theory of molecular geometry we see the 90°, 120°, 180° angles. (We also see the 72° and 144° angles which are used, but are less important in astrology.)
Orbital hybridization is another model that’s used to explain molecular geometry and here we also see the 90°, 120° and 180° angles. For example, some biologically important organic compounds with sp2 hybridization have bond angles of 120° (Ref). An angle of 120° is known as a trine in astrology and is considered a major aspect.
Hydrogen bonds are intermolecular forces that influence protein structure (and hence enzymes). The angles 0°, 120°, 150° and 180° feature in hydrogen bonding.
In some cases the angle is not exact, but still within a 3° orb. For example, the orb allows angles between 117-123° to count as 120° angles. This 3° is relatively small and is used by Magi Astrologers of the Magi Society. Traditional astrologers may use orbs was wide as 10°. However, the Magi Society has done research on data collected since the society was formed in 1625. We are confident that our methods are reliable.
There are a few other angles in molecular geometry that do not feature in astrology. For example, the 104.5° found between the hydrogen atoms in water molecules and the 109.5° angles found in compounds such as methane. However, the majority of the angles seem to also be important in astrology.
So there’s a correspondence between the angles used in astrology and those found in molecules, but how do they relate to each other? Does the movement of the planets and the subsequent movement in direction of the forces acting on the Earth’s molecules result in straining of bond angles and does this affect biological chemical reactions by affecting enzyme specificity?
Next time you're feeling stressed, consider that your body may be making more cortisol (stress hormone) than usual because of how Saturn is directly affecting your cells via it’s gravity at that moment.