Heinrich Louis d'Arrest | |
|---|---|
 Heinrich Louis d'Arrest | |
| Born | 13 August 1822 Berlin |
| Died | 14 June 1875(1875-06-14) (aged 52) |
| Known for | Neptune |
| Awards | Gold Medal of the Royal Astronomical Society Lalande Prize (1844) |
| Scientific career | |
| Doctoral students | Thorvald N. Thiele |
Heinrich Louis d'Arrest (13 August 1822 – 14 June 1875;German pronunciation:[daˈʁɛ] [1]) was aGermanastronomer, born inBerlin. His name is sometimes given asHeinrich Ludwig d'Arrest.
While still a student at theUniversity of Berlin, d'Arrest was party toJohann Gottfried Galle's search forNeptune. On 23 September 1846, he suggested that a recently drawn chart of the sky, in the region ofUrbain Le Verrier's predicted location, could be compared with the current sky to seek the displacement characteristic of aplanet, as opposed to a stationarystar.Neptune wasdiscovered that very night.
D'Arrest's later work at theLeipzig Observatory led him, in 1851, to the discovery of thecomet named for him (formally designated6P/d'Arrest). He also studiedasteroids, discovering76 Freia,nebulae, and galaxies, discoveringNGC 1 in 1861 andNGC 26 andNGC 358 in 1865.
In 1864 D'Arrest made an unsuccessful search forMartian satellites, and posited an upper limit of 70minutes of arc as the distance from Mars within which a moon should be sought.[2]
He won theGold Medal of the Royal Astronomical Society in 1875.
In 1857, he married Auguste Emilie Möbius, daughter of his then-supervisor,August Ferdinand Möbius.[3] He died inCopenhagen, Denmark.
The craterD'Arrest on the Moon, the craterD'Arrest on the Martian satellitePhobos, as well as the asteroid9133 d'Arrest were named after him.
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