"...eine ausnehmende Zierde und Vortheil" - Geschichte der Kieler Universitätssternwarte und ihrer Vorgängerinnen 1770 - 1950 (Lühning)

"A bare outpost of learned European culture on the edge of the jungles of Java": Johan Maurits Mohr (1716-1775) and the emergence of instrumental and institutional science in Dutch Colonial Indonesia

"A Scientist Has Many Things to Do:" EPO Strategies that Focus on the Processes of Science

"A Very Double Life"

"A" is for astrophysics.

"Abbreviating" the Alfonsine Tables in Cracow: the "Tabulae Aureae" of Petrus Gaszowiec (1448)

"Aber wir entsetzeten uns nicht wenig..." Am 12. Mai 1706 fiel der Mondschatten letztmals auf Süddeutschland.

"Active" galaxies found in the CNOC (Canadian Network for Observational Cosmology) cluster redshift survey.

"Amateur Astronomer's Handbook"

"An Appeal to the Friends of Astronomy."

"An Atlas of Representative Stellar Spectra." A Review

"An Event Of No Ordinary Interest" - The Inauguration of Albany's Dudley Observatory

"An Improved Astronomical Mirror"

"Arcturus"

"Are we done yet?"

"Astro à l'Ecole" equipment plan

"Astronomie/vor Ort" - an Education Project in Astronomy for Primary Schools

"astronomy Improved"

"Atomic Oxygen on Venus"

"B" Stars of Low and Intermediate Luminosity (Spanish Title: Lista de Estrellas "B" de luminosidad baja e intermedia)