Harvard College Observatory
Organization
REFINE MY RESULTS:
- Type
- Archival Object 188
- Collection 56
- Subject
- Variable stars. 31
- Astronomy -- Observations. 11
- Astronomical clocks -- United States. 7
- Asteroids. 6
- Astronomy -- Research. 6
- Chronograph. 6
- Longitude -- Measurement -- History. 6
- Solar eclipses -- Observations. 6
- Astronomers -- United States. 5
- Astronomical photometry. 5
- Astronomy. 5
- Harvard University -- Astronomy 5
- Photographs 5
- Telescopes. 5
- Astronomical observatories -- Massachusetts -- Cambridge. 4
- Astronomy -- 19th century. 4
- Correspondence. 4
- Diaries 4
- Meteors. 4
- Time measurements. 4
- Astronomy -- History. 3
- Chronometers. 3
- Comets. 3
- Financial records. 3
- Stars -- Clusters. 3
- Sun -- Research. 3
- Women astronomers--United States 3
- Amateur astronomy. 2
- Asteroids--Orbits. 2
- Astronomers 2
- Astronomical instruments -- Design and construction. 2
- Astronomical photography. 2
- Boyden Station (Bloemfontein, South Africa) 2
- Horology. 2
- Manuscripts (documents) 2
- Milky Way 2
- Nebulae. 2
- Observatories. 2
- Occultations. 2
- Photoprints. 2
- Scientific apparatus and instruments. 2
- Scientists 2
- Scientists--United States 2
- Surveying -- Geodetic. 2
- Time -- Systems and standards -- United States. 2
- Women in astronomy -- History. 2
- Aberdeen Proving Ground (Md.) 1
- Account books. 1
- Aging--United States 1
- Albums. 1
- American Association of Variable Star Observers. 1
- Annual reports. 1
- Astrometry 1
- Astronomers -- Archives. 1
- Astronomers--United States 1
- Astronomers. 1
- Astronomical instruments 1
- Astronomical observatories -- South Africa. 1
- Astronomy 1
- Astronomy -- Societies, etc. 1
- Astronomy -- Study and teaching. 1
- Astrophysics. 1
- Auroras--Spectra. 1
- Auroras. 1
- Autobiographies 1
- Autobiographies. 1
- Black-and-white photographs 1
- Black-and-white photographs. 1
- Boyden Station (Arequipa, Peru) 1
- Clocks and watches -- Marketing. 1
- Comets--Orbits. 1
- Contracts. 1
- Cryptography. 1
- Diplomas. 1
- Donati comet. 1
- Drawings 1
- Eclipses, Solar -- 1973. 1
- Emigration and immigration 1
- Family records 1
- Geodesy -- Observations 1
- Geodesy. 1
- Glass plate negatives 1
- Harvard College Observatory (Cambridge, MA) 1
- Harvard College Observatory -- Photographs. 1
- Harvard University -- Finance. 1
- Harvard University -- Women. 1
- Immigrants' writings, German 1
- Lantern slides. 1
- Lecture notes 1
- Letterpress copybooks. 1
- Letters (correspondence) 1
- Letters. 1
- Magnetic fields -- Measurement 1
- Magnetic fields. 1
- Magnetism. 1
- Maine. 1
- Manuscripts for publication 1
- Maps 1
- Medals 1
- Memoirs 1 ∧ less
∨ more