 Discoveries by Heinrich Louis d'Arrest

"Discoveries" by Heinrich Louis d'Arrest likely refers to his work in astronomy, particularly his contributions to the field of comet discovery. Heinrich Louis d'Arrest was a German astronomer known for several significant contributions in the 19th century. He is best known for his discovery of the asteroid 150 Eugenia in 1875 and for his work on the study of comets, especially the periodic comets.