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Albert Marth (May 5, 1828 – August 6, 1897) was a German astronomer who worked in England and Ireland.
He came to England in 1853 to work for George Bishop, a rich wine merchant and patron of astronomy. At that time, paid jobs in astronomy were quite rare.
He worked as William Lassell's assistant in Malta, discovering 600 nebulae. He also discovered one of the earlier asteroids found, 29 Amphitrite.
From 1883 to 1897 he worked at the Markree Observatory in Ireland where he was the second director appointed in its second period of operation.
He made extensive ephemerides of solar system bodies. He even performed calculations of transits of various planets from other planets, predicting transits of Earth from Mars and many others.
Craters on the Moon and Mars are named for him.