.
1887, November Langley's researches on the temperature of the moon.
1887, Nov. 17 Lockyer's _Researches on Meteorites_ communicated to
the Royal Society.
1887 Completion of 36-inch Lick refractor.
1888 Kuestner's detection of variations in the latitude of
Berlin brought before the International Geodetic
Association.
1888 Chandler's first Catalogue of Variable Stars.
1888 Mean parallax of northern first magnitude stars
determined by Elkin.
1888 Publication of Dreyer's _New General Catalogue_ of
7,844 nebulae.
1888 Vogel's first spectrographic determinations of stellar
radial motion.
1888 Carbon absorption recognised in solar spectrum by
Trowbridge and Hutchins.
1888, Jan. 28 Total eclipse of the moon. Heat-phases measured at
Parsonstown.
1888, Feb. 5 Remarkable photograph of the Orion nebula spectrum
taken at Tulse Hill.
1888, June 1 Activity of the Lick Observatory begun.
1888 Completion of Dr. Common's 5-foot reflector.
1888 Heliometric measures of Iris for solar parallax at the
Cape, Newhaven (U.S.A.), and Leipsic.
1888 Loewy describes a comparative method of determining
constant of aberration.
1888 Presentation of the Dunecht instrumental outfit to
the nation by Lord Crawford. Copeland succeeds
Piazzi Smyth as Astronomer-Royal for Scotland.
1888, Sept. 12 Death of R. A. Proctor.
1889 Photograph of the Orion nebula taken by W. H. Pickering,
showing it to be the nucleus of a vast spiral.
1889 Discovery at a Harvard College of the first-known
spectroscopic doubles, Zeta Ursae Majoris and
Beta Aurigae.
1889 Eclipses of Algol demonstrated spectrographically by
Vogel.
1889 Completion of photographic work for the Southern
Durchmusterung.
1889 Boeddicker's drawing of the Milky Way.
1889 Draper Memorial photographs of southern star-spectra
taken in Peru.
1889