Best Proper Motion
Edmond Halley (1656–1742) was an English astronomer, mathematician, and geophysicist who served as the second Astronomer Royal from 1720 until his death. In 1705 he published A Synopsis of the Astronomy of Comets, in which he calculated the orbits of two dozen comets and predicted that sightings in...
Edward Emerson Barnard (1857–1923) was an American observational astronomer who joined the staff of Lick Observatory in California and later moved to Yerkes Observatory in Wisconsin. He discovered Jupiter's fifth moon, Amalthea, in 1892, the first Jovian satellite found since Galileo's time, and mea...
Sharpless 2-68 is an ancient planetary nebula in Serpens, notable for a long tail formed through interaction with the surrounding interstellar medium.
American astronomer (1846–1912) who directed the Dudley Observatory and compiled the General Catalogue of 33,342 stars, a major astrometric reference work.
Adriaan van Maanen was a Dutch astronomer who measured the large proper motion of a white dwarf star in 1917, which was later named Van Maanen's Star in recognition of his discovery.
