Complex sentence: NGC 1554, "Struve's Lost Nebula", is a list entry in the New General Catalogue of Nebulae compiled by John L. E. Dreyer, which was discovered by the German-Russian astronomer Otto Wilhelm von Struve and confirmed by Heinrich Louis d'Arrest.
Split into simpler sentences: NGC 1554, "Struve's Lost Nebula", is a list entry in the New General Catalogue of Nebulae compiled by John L. E. Dreyer. The nebula was discovered by the German-Russian astronomer Otto Wilhelm von Struve and confirmed by Heinrich Louis d'Arrest.