Huygens had proposed in 1655 that Saturn …

Years: 1659 - 1659

Huygens had proposed in 1655 that Saturn was surrounded by a solid ring, "a thin, flat ring, nowhere touching, and inclined to the ecliptic."

Using a 50 power refracting telescope that he designed himself, Huygens had so discovered the first of Saturn's moons, Titan.

In the same year he had observed and sketched the Orion Nebula.

His drawing, the first such known of the Orion nebula, is published in Systema Saturnium in 1659.

Using his modern telescope he succeeds in subdividing the nebula into different stars. (The brighter interior of the Orion Nebula bears the name of the Huygens Region in his honor.)

He also discovers several interstellar nebulae and some double stars.

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