Astronomy Library of the Vienna University -
http://www.univie.ac.at/hwastro/
Brahe, Tycho: De nova et nullius ævi memoria prius visa
Stella, iam pridem Anno à nato CHRISTO 1572, mense Novembrj
primùm Constecta, contemplatio mathematica . -
København: Lorentz Benedikt, 1573. [Om den nye stjerne].
http://www.archive.org/details/denovaetnullius00brahgoog
Dresden Codex eller Codex Dresdensis, udateret
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http://digital.slub-dresden.de/fileadmin/data/280742827/280742827_tif/jpegs/280742827.pdf
Albert Einstein, Karl Schwarzschild and the Schwarzschild
Metric. / : Patrick Bruskiewich.
Mathematical-physics, University of British Columbia, Vancouver,
BC. 2012.
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https://archive.org/details/AlbertEinsteinKarlSchwarzschildAndTheSchwarzschildMetric
A close look at the life and work of Karl Schwarzschild and in
particular the Schwarzschild Metric and his two papers from 1916.
It is evident that scientists like Riemann and Schwarzschild were
looking at gravity as a curving of space long before Einstein and
his famous 1916 paper on the Theory of General Relativity. Einstein
was definitely not the first physicist to suggest that space-time
was curved. Schwarzschild wrote a paper on the subject of the
curvature of space in 1900, over fifteen years before Einstein's
1916 paper. Schwarzschild may have been inspired by work by Gauss,
but was certainty inspired by the work on the curvature of space
done by Riemann. Schwarzschild could expand on Einstein's 1916
paper so readily because he was familiar with the math and
physics.
The equation of state perspective to the Schwarzschild model of
stellar structure showed a dichotomy between Dr. Kaempffer and Dr.
Volkoff. Dr. Kaempffer emphasized the space-time aspect of the
model, while Dr. Volkoff emphasized the equation of state aspect of
the model. It is understandable why Dr. Volkoff, who is famous for
his 1939 paper with J.R. Oppenheimer, and is known for the
Oppenheimer-Volkoff equation of state of neutron stars, would place
special emphasis on the equation of state aspect of the
problem.
Der Almanach perpetuum des Abraham Zacuto: ein Beitrag zur
Geschichte der Astronomie im Mittelalter (1918, 1478).
- http://www.archive.org/details/deralmanachperpe00cohn
Heritage Sites of Astronomy and
Archaeoastronomy in the context of the UNESCO World Heritage
Convention: A Thematic Study. / : Clive Ruggles and Michel
Cotte. - Paris: ICOMOS ; the International Astronomical Union,
2010. 
Halley's Comet in History. / : editors F R Stephenson and C
B F Walker. British Museum Publications, 1985.
Horrebow, Peder: Elementa doctrinae sphaericae, eller En
kort og tilstrækkelig underretning om jord- og
himmel-kuglernes brug, uddragen og oversat af vores
vidtberømte mathematici, herr professor Peder Horrebows,
fortreffelige latinske compendio, til den studerende ungdoms brug
og nytte i skolerne udi Danmark og Norge, og, for deres skyld i
særdeeleshed, som mangle levende anviisning, forøget
med adstillige anmaerkninger og problematibus ved J.H. Trykt hos
directeuren over Hans Kongel . Majestaets og Universitaets
bogtrykkerie J.J . Høpffner, 1750. - 90 s.
Hubble, Edwin Powell: Photographic investigations of
faint nebulae / Fotografiske undersøgelser af svage
stjernetåger ([1920]).
- http://www.archive.org/details/photographicinve00hubbrich
Parapegmata, Or, Astrology, Weather, and Calendars in the
Ancient World, Being an Examination of the Interplay Between the
Heavens and the Earth in the Classical and Near-Eastern Cultures of
Antiquity, with Particular Reference to the Regulation of
Agricultural Practice, and to the Signs and Causes of Storms,
Tempests, & c.. A thesis submitted in confonnity with the
requirements for the degree of Doctor of Philosophy, Instituie for
the History and Philosophy of Science and Technology. University of
Toronto. / Daryn Rosario Lehoux. 2000. - 247 s.
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http://www.collectionscanada.gc.ca/obj/s4/f2/dsk2/ftp03/NQ53766.pdf
Wright, Thomas: The universe and the stars, being an original
theory on the visible creation, founded on the laws of
nature.
- Philadelphia, Printed for C. Wetherill, 1837.
- https://archive.org/details/universestarsbei00wrig
'London ed. of 1750 has title: An original theory or new hypothesis
of the universe.'