x₁ = r₁ cos α₁ cos δ₁
y₁ = r₁ sin α₁ cos δ₁
z₁ = r₁ sin δ₁
x₂ = r₂ cos α₂ cos δ₂
y₂ = r₂ sin α₂ cos δ₂
z₂ = r₂ sin δ₂
Δx = x₂ − x₁
Δy = y₂ − y₁
Δz = z₂ − z₁
d = sqrt[ (Δx)² + (Δy)² + (Δz)² ]
α = star's right ascension
δ = star's declination
r = star's distance from Earth
d = the distance between star #1 and star #2 Dump the liberals into Jupiter · 6 years ago