Similar to オリオン大星雲

List of Messier objects

Template:Messier objects

Messier 25

Winnecke 4

Messier 102

Messier 109

Christiaan Huygens

31 equal temperament

Probability theory

Titan (moon)

Tautochrone curve

Light#Wave theory

Pendulum clock

Parallel axis theorem

Huygens–Fresnel principle

Huygens (spacecraft)

Reciprocating engine

Orion (constellation)

Template:Orion (constellation)

List of stars in Orion

15 Orionis

25 Orionis