- Gatti, Hilary. Giordano Bruno and Renaissance Science: Broken Lives and Organizational Power. Cornell University Press, 2002, 1, ISBN 0-801-48785-4
- Bruno was a mathematician and philosopher, but is not considered an astronomer by the modern astronomical community, as there is no record of him carrying out physical observations, as was the case with Brahe, Kepler, and Galileo. Pogge, Richard W. http://www.astronomy.ohio-state.edu/~pogge/Essays/Bruno.html 1999.
- Birx, James H. "Giordano Bruno" The Harbinger, Mobile, AL, 11 November 1997. "Bruno was burned to death at the stake for his pantheistic stance and cosmic perspective."
- Giordano Bruno: Martyrs of free thought no. 1
- Frances Yates, Giordano Bruno and the Hermetic Tradition, Routledge and Kegan Paul, 1964, p. 450
- Michael J. Crowe, The Extraterrestrial Life Debate 1750–1900, Cambridge University Press, 1986, p. 10, "[Bruno's] sources... seem to have been more numerous than his followers, at least until the eighteenth- and nineteenth-century revival of interest in Bruno as a supposed 'martyr for science.' It is true that he was burned at the stake in Rome in 1600, but the church authorities guilty of this action were almost certainly more distressed at his denial of Christ's divinity and alleged diabolism than at his cosmological doctrines."
- Adam Frank (2009). The Constant Fire: Beyond the Science vs. Religion Debate, University of California Press, p. 24, "Though Bruno may have been a brilliant thinker whose work stands as a bridge between ancient and modern thought, his persecution cannot be seen solely in light of the war between science and religion."
- White, Michael (2002). The Pope and the Heretic: The True Story of Giordano Bruno, the Man who Dared to Defy the Roman Inquisition, p. 7. Perennial, New York. "This was perhaps the most dangerous notion of all... If other worlds existed with intelligent beings living there, did they too have their visitations? The idea was quite unthinkable."
- Galileo goes to jail and other myths about science and religion ：第六十六頁; Cambridge, MA：Harvard University Press;〈Myth 7 That Giordano Bruno was the first martyr of modern science〉 "Yet the fact remains that cosmological matters, notably the plurality of worlds, were an identifiable concern all along and appear in the summary document: Bruno was repeatedly questioned on these matters, and he apparently refused to recant them at the end.14 So, Bruno probably was burned alive for resolutely maintaining a series of heresies, among which his teaching of the plurality of worlds was prominent but by no means singular."
- Giordano Bruno- Encyclopædia Britannica
- The primary work on the relationship between Bruno and Hermeticism is Frances Yates, Giordano Bruno and The Hermetic Tradition, 1964; for an alternative assessment, placing more emphasis on the Kabbalah, and less on Hermeticism, see Karen Silvia De Leon-Jones, Giordano Bruno and the Kabbalah, Yale, 1997; for a return to emphasis on Bruno's role in the development of Science, and criticism of Yates' emphasis on magical and Hermetic themes, see Hillary Gatti (1999), Giordano Bruno and Renaissance Science, Cornell.
- Alessandro G. Farinella and Carole Preston, "Giordano Bruno: Neoplatonism and the Wheel of Memory in the 'De Umbris Idearum'", in Renaissance Quarterly, Vol. 55, No. 2, (Summer, 2002), pp. 596–624; Arielle Saiber, Giordano Bruno and the Geometry of Language, Ashgate, 2005