According to this article:
α (alpha) can be:
the first angle of a triangle;
the angle of attack of an aircraft;
right ascension in astronomy;
the brightest star in a constellation;
β (beta) can be:
the second angle in a triangle, opposite the side B;
the sideslip angle of an airplane;
the first-order effects of variations in Coriolis force with latitude in planetary dynamics;
velocity divided by the speed of light in special relativity;
ecliptic latitude in astronomy;
Γ (gamma) can be:
the reflection coefficient of a transmission or telecommunication line.;
γ (gamma) can be:
the third angle in a triangle, opposite the side C;
Δ (delta) can be:
the angle that subtends the arc of a circular curve in surveying;
distance to Earth, measured in astronomical units;
δ (delta) can be:
declination in astronomy;
ε (epsilon) can be:
the Earth's axial tilt in astronomy;
I can't ignore the greek letters. To me, they indicate something.
α (alpha) can be:
the first angle of a triangle;
the angle of attack of an aircraft;
right ascension in astronomy;
the brightest star in a constellation;
β (beta) can be:
the second angle in a triangle, opposite the side B;
the sideslip angle of an airplane;
the first-order effects of variations in Coriolis force with latitude in planetary dynamics;
velocity divided by the speed of light in special relativity;
ecliptic latitude in astronomy;
Γ (gamma) can be:
the reflection coefficient of a transmission or telecommunication line.;
γ (gamma) can be:
the third angle in a triangle, opposite the side C;
Δ (delta) can be:
the angle that subtends the arc of a circular curve in surveying;
distance to Earth, measured in astronomical units;
δ (delta) can be:
declination in astronomy;
ε (epsilon) can be:
the Earth's axial tilt in astronomy;
I can't ignore the greek letters. To me, they indicate something.