The story of the universe, told by great scientists and popular authors. Volume 1 (of 4), The starry skies.

by Unknown

FOOTNOTES:

[4] Except concave spectacles used by short-sighted persons.

[5] This custom has since prevailed. The following are the letters and their names:

α	Alpha	η	Eta	ν	Nu	τ	Tau
β	Beta	θ	Theta	ξ	Xi	υ	Upsilon
γ	Gamma	ι	Iota	ο	Omicron	φ	Phi
δ	Delta	κ	Kappa	π	Pi	χ	Chi
ε	Epsilon	λ	Lambda	ρ	Rho	ψ	Psi
ζ	Zeta	μ	Mu	σ	Sigma	ω	Omega