Article Peter D. Usher; Enrico Massaro (2023)
The Sixteenth-Century Empirical Disproof of Ptolemaic Geocentrism. Journal of Astronomical History and Heritage (pp. 659-666). (/isis/citation/CBB042095095/) unapi

Review Peter D. Usher (2023)
Review of "This Dark Star: Thomas Digges, the Scientific Revolution, and the Infinite Universe". Journal of Astronomical History and Heritage. (/isis/citation/CBB963379805/) unapi

Article Enrico Massaro; Peter D. Usher (2022)
Ancient and Renaissance astronomers in Shakespeare's The Tragedy of Hamlet. Journal of Astronomical History and Heritage (pp. 745-759). (/isis/citation/CBB048967250/) unapi

Book Peter D. Usher (2022)
Shakespeare's Knowledge of Astronomy and the Birth of Modern Cosmology. (/isis/citation/CBB677320872/) unapi

Book Usher, Peter D. (2015)
Shakespeare and Saturn: Accounting for Appearances. (/isis/citation/CBB001510005/) unapi

Article Peter D. Usher (2013)
Kepler's Supernova and Shakespeare's All's Well. Journal of the Royal Astronomical Society of Canada (pp. 103-105). (/isis/citation/CBB773731279/) unapi

Book Peter D. Usher (2010)
Shakespeare and the Dawn of Modern Science. (/isis/citation/CBB396172645/) unapi

Article Peter Usher (2009)
Shakespeare and Elizabethan Telescopy. Journal of the Royal Astronomical Society of Canada (p. 16). (/isis/citation/CBB894681355/) unapi

Book Peter Usher (2006)
Hamlet's Universe. (/isis/citation/CBB370477627/) unapi

Article Peter Usher (2005)
Hamlet's Love Letter and the New Philosophy. Oxfordian (pp. 93-109). (/isis/citation/CBB901231477/) unapi

Article Peter D. Usher (2003)
Jupiter and Cymbeline.. Shakespeare Newsletter (pp. 7-12). (/isis/citation/CBB708438466/) unapi

Article Peter D. Usher (2002)
Shakespeare's Support for the New Astronomy. Oxfordian (pp. 1-16). (/isis/citation/CBB799349495/) unapi

Article Peter Usher (2001)
Advances in the Hamlet Cosmic Allegory. Oxfordian (pp. 25-49). (/isis/citation/CBB359952499/) unapi

Article Peter D. Usher (1999)
Hamlet's Transformation. Elizabethan Review (pp. 48-64). (/isis/citation/CBB583913010/) unapi

Article Peter D. Usher (1997)
Shakespeare's Cosmic World View. Mercury (p. 20). (/isis/citation/CBB197575276/) unapi

Article Peter Usher (1997)
Hamlet and the Infinite Universe. Research Penn State (pp. 6-7). (/isis/citation/CBB470062734/) unapi

Article Usher, Peter D. (1979)
LaCaille at the Cape. Astronomical Quarterly (pp. 185-190). (/isis/citation/CBB000023794/) unapi