Customer Reviews: Sidereus Nuncius, or The Sidereal Messenger
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on October 24, 2003
Sometimes reading the great works of literature- be they scientific, historical, fictional or otherwise- is a chore. The language is often stilted and the reasons for an author touching on a given subject are not entirely clear. Not so with this excellent translation of Galileo's "Starry Messenger" or, as he called it in the original latin, Sidereus Nuncius. Albert van Helden has provided us with an excelent and wonderfully readable translation of one of the most thrilling "messages" of the last thousand years: that is, that the universe is much more than it seems to the naked eye.
Van Helden divides his book into three sections: First, he gives a well researched, well footnoted, introduction to Galieo and his times. We learn about the invention of the telescope (then called the "Spyglass")- an exceptionally crude instrument by even the most modest of today's standards. Van Helden tells his story with abundant quotes from the writings of Galileo's contemporaries. Amongst other things, we learn that another astonomer, Thomas Harriot, may have observed the moon with a telescope somewhat before Galileo, but that his observations, through an inferior instrument, did not reveal much more than could be seen with the naked eye. We learn about the then dominant view of the univserse, the geocentric "Aristotelean" model and the arguments given in favor of it. We also learn about Galileo himself. The publication of the "Starry Messenger," was, it seems, a bit of a rush job, as a financially strapped Galileo wanted priority for his discoveries and the position and money that he though would go with it.
We also learn that while Galileo didn't invent the telescope (or SpyGlass) he greatly improved it from an almost totally useless instrument, to a useful, merely wretched, one (again, by today's standards.)
The middle section is Galileo's "Starry Messenger" itself. The text is brief and only strays a bit from a simple recounting of his observations to explain such things as his deduction of the height of the moons' mountains. Galileo wrote with a wide and not necessarily scientific audience in mind and he took their preconceptions into account when cobbling together his "message". This makes his thought process easy to follow. (Van Helden's translation uses apropriately contemporary English.) It's a delight to read about Galileo's observations and follow his careful (though sometimes incorrect) reasoning about what he has seen. There are delighful reproductions of Galileo's illustrations of the moon, stars, and Jupiter's satellites.
Armed with the knowledge and sense of the times that Van Helden has given us, Galileo's discoveries feel as revolutionary as they were. (Quite a feat, given our current view of the universe.) Having learned that the Aristotelians thought of the universe as somehow different, more perfect, than the "corrupted" terrestrial world, Galileo's observations of the moon take on great significance. Galileo wonders in amazement at the multitudes of stars his telescope reveals and gives a few sample drawings of some "nebular" regions of the Milky Way- which he discovers are mere assemblages of stars too faint to make out individually, but which cumulatively present to the eye a cottony appearance.
The least readable portion of Galileo's writing is also the most significant and carefully presented: his discovery and observations of the "Medician" moons- as he dubbed them, we now refer to them as the four "Galilean" moons. Galileo makes it clear that he, early in his observations of the planet Jupiter, sensed the three (later four) "stars" that he had discovered whirling about Jupiter were significant. He proceeds to carefully, and monotonously, document several weeks of observations of what he comes to consider planets. That he chose to do this in such a thorough way, however, is telling. Despite his desire to publish early and claim priority, Galileo wanted to assure his readers that what he was seeing was real.
Throughout the text, the translator provides footnotes explaining some of Galileo's mistakes, later changes of thought, and the context of a given argument. I came away from the text knowing exactly what Galileo was attempting to convey, and the few places where he went wrong (for instance, in surmising that the moon had a thick atmosphere).
The third section is similar to the first and covers the immedate reaction to the publication of the Sidereus Nuncius- which Galileo sent to as many heads of state as he could, often sending a spyglass along with the text so that observations could be repeated. Van Helden outlines many of the objections to Galieo's claim that he had discovered the moon to be rough and Jupiter to be surrounded by satellites of its own. The most significant of these objections was grounded, once again, in the Aristotelian logic of the day which claimed that one could learn all there was to learn about the world with the unaided senses. In other words, people didn't believe that the telescope (the first instrument to extend human senses beyond their natural talents) could be trusted to present reality.
Van Helden only briefly hints at Galileo's subsequent trial and trouble with the Church. This seems apropriate, however, considering that, at the time of its publication, some of Galileo's most ardent supporters were not other "natural philosophers" or "mathmeticians"- who, Van Helden demonstrates, were sometimes jealous and harshly critical- but some members of the Church- his sponsors.
All in all, this is a wonderful introduction to the times and discoveries of Galileo. It's a great book to read for those who enjoyed Galileo's Daughter and other biographies one of the world's first true scientists. That the words "Starry Messenger" do not appear in the title might throw a few potential readers off its trail in their search for a good translation, and this is a shame- let's hope that Amazon's new search engine brings this one up from the depths.
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on April 3, 2000
This is Galileo's report of his first discoveries with the telescope, especially his drawings of the moon and obervations of Jupiter's satellites. To read Galileo's ideas, methods, and results first hand gives an idea of his brilliance and attention to detail. This book was crucial in the development of the Copernican revolution. It is exciting to read, and not at all difficult.
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on November 14, 2000
This new translation, with introduction, conclusion, and notes, by famed author Albert Van Helden is a wonderful reading of Galileo Galilei's timeless classic, Sidereus Nuncius. For all who are astronomy fans, Van Helden, Professor of History at Rice University, gives readers a glimpse of the man, Galileo, and his earth-shattering findings. In his book,Sidereus Nuncius, or the Sidereal Messenger, Galileo describes his reinvention of the refracting telescope and his subsequent astronomical discoveries. Never before has a scientific instrument had a more dramatic impact than that of Galileo's telescope. It not only advanced scientific knowledge, but affected personal philosophy and religion by upsetting the traditional belief of the Earth as the center of the universe. Galileo's work challenged the geocentric cosmology that had been accepted since the days of Aristotle. If Galileo's discoveries and carefully documented observations were true, people had to accept the fact that the Earth was not at the center of the universe. This was very difficult for people in the 17th century to accept because it went against long held beliefs.. Add Galileo's analysis of an imperfect moon and people were force to reevaluate history,science, and their personal religions. Galileo opened the door to the truth about our heliocentric universe; however, few people of his day were prepared to accept it. Van Helden's translation, based on the original 1610 Latin text, is a wonderful book for all those who enjoy gazing into the heavens on a clear, star-filled night in wonder. Galileo Galilei did the same. Everyone will enjoy reading Sidereus Nuncius, as Galileo's voice echoes down the centuries and brings his amazing discoveries to life.
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on February 24, 2002
This book will help you understand just how much Galileo affected and reflected the science of the time and even the science of today. I had the privilage of taking Prof. Van Helden's courses at Rice U. and they were some of the most informational and facinating courses I took. He is now emeritus, but hopefully that means we can look forward to more excellent translations and commentary in the years to come.
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on May 28, 2014
This is an engaging account of the first documented telescopic observations. Galileo carefully notes what he saw thru his telescopes (he made 60). He is believed to be the first person to see craters and mountains on the moon, stars in the Milky Way, and 4 satellites of Jupiter. His observations revolutionized our knowledge of astronomy. This book would be of interest primarilly to science history and astronomy buffs. A good read.
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on February 22, 2015
Short but interesting read for astronomy buffs or science fans. Kindle version has some glitches and locks up the app occasionally. Provides interesting insight to Galileo and how his mind worked, as well as first hand account of his discoveries. The wonder of his descriptions still still captivates after 400 years. I confess that after reading it, I took my own little telescope out to look at the the pleiades and orion all over again, with galileo's description still ringing in my ears.
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on January 4, 2010
Everyone interested in Astronomy should buy this edition of this classic little book, it's a quick read. Galileo's text conveys his excitement as he is telling people what he's seen with his new instruments, and you can sense his joy as he explains to the philosophers, academics and clerics that he now knows, knows and can prove (!), that the world is very different from what they have long taught!

The book is essentially two essays: the original Galileo text (in translation) with his drawings, and interesting background and context material by Van Helden on Galileo, telescopes, and astronomy of the time. Galileo here is putting down on paper the record of his first few months of observing, so there's a fair amount of detail, some interesting and some not so interesting (like page after page showing the alignment of the four satellites of Jupiter), but with the addition of Van Helden's background material the result is nice little book.

One little tidbit of Galileo's that I enjoyed, which I have not seen elsewhere, was his simple explanation of how his observations of the moon's light/dark terminator allowed him to calculate the height of mountains on the moon. He got 4 miles, which with a little trigonometry anyone can check.
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on October 26, 2014
This book is simply great and Van Helden does a very good analysis in his introduction and conclusion, very easy to read and erudite. As for Galileo's text itself, who could argue anything against it? Highly recommended for anyone with an interest in the history of astronomy. It's exciting to be transported to a time where the book of astronomical discoveries was still full of blank pages, ready to be filled by anyone minimally willing to make an effort for it.
I gave only four stars because the kindle edition, the one I purchased, is tremendously full of typos! At times it is so frequent and blatant that it gets annoying. The substance, however, makes it worth it. I just hope they will correct the typos for a new edition.
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on May 9, 2015
The discovery made by Galilei described in this short book was one of the most important (if not the most important) scientific achievements in human history regarding the structure of the Universe. The translator did a great job bring the Sidereus Nuncius to us in plain English. Reading through the book gave me a very special feeling of witnessing the most fundamental changes in cosmology brought by Galilei's observation and very scientifically sound (well, in most cases) reasoning and deduction.
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on June 3, 2013
In very good condition for used book. No markings!! Ordered for my son for next college semester & sometimes the markings in used books have been excessive & he finds them distracting. This one is great! Thanks.
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