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Common terms and phrasesanco appear arranged astronomers Astronomia Nova atmosphere boundary bright brighter cavities centre circle circumference Copernican system dark darker diameter disc discoveries distance from Jupiter Earth Earth's atmosphere east side eccentric ecliptic epicycle exactly fifth hour fixed stars GALILEO GALILEI Giove heavenly bodies heavens hour the satellite illuminated Illustrissima e Reverendissima instrument intervals Kepler Kepler's Dioptrics larger length light line with Jupiter lunar magni magnitude Medicean Stars middle satellite Milky molto Moon Moon's surface motion mountains nearer nearest satellite nearest to Jupiter nearly night Nuncius observations occhiale orbit phenomena Pianeti planet portion position Ptolemaic system quale rest satel satellite furthest satellite nearest satellites and Jupiter Saturn seen shadow shine side of Jupiter Sidereal Messenger Sidereus Nuncius sight Signoria Illustrissima sixth hour smaller sphere spots stationary points Sun's rays telescope three satellites tude Tycho Brahe visible west of Jupiter western satellite Zodiac Popular passagesPage 16 - Moon and the other heavenly bodies, but that, on the contrary, it is full of inequalities, uneven, full of hollows and protuberances, just like the surface of the Earth itself, which is varied everywhere by lofty mountains and deep valleys. The appearances from which we may gather these conclusions are of the following nature: — On the fourth or fifth day after new-moon, when the Moon presents itself to us with bright horns, the boundary which divides the part in shadow from the enlightened part... Page 11 - ... importance of the benefits which this instrument may be expected to confer, when used by land or sea. But without paying attention to its use for terrestrial objects, I betook myself to observations of the heavenly bodies; and first of all, I viewed the Moon as near as if it was scarcely two semidiameters of the Earth distant. After the Moon, I frequently observed other heavenly bodies, both fixed stars and planets, with incredible delight... Page 10 - About ten months ago a report reached my ears that a Dutchman had constructed a telescope by the aid of which, visible objects, although at a great distance from the eye of the observer, were seen distinctly as if near; and some proofs of its most wonderful performances were reported, which some gave credence to, but others contradicted. A few days after, I received confirmation of the report in a letter written from Paris by a noble Frenchman... Page 46 - I scarcely troubled at all about the distance between them and Jupiter, for, as I have already said, at first I believed them to be fixed stars; but when on January 8th, led by some fatality, I turned again to look at the same part of the heavens, I found a very different state of things... Page 10 - Jaques Badovere, which finally determined me to give myself up first to inquire into the principle of the telescope, and then to consider the means by which I might ,. compass the invention of a similar instrument, which after a little while I succeeded in doing, through deep study of the theory of Refraction... Page 68 - These are my observations upon the four Medicean planets, recently discovered for the first time by me; and although it is not yet permitted me to deduce by calculation from these observations the orbits of these bodies, yet I may be allowed to make some statements, based upon them, well worthy of attention. Page 46 - When I had seen these phenomena, as I knew that corresponding changes of position could not by any means belong to Jupiter, and as, moreover, I perceived that the stars which I saw had always been the same, for there were no others either in front or behind, within a great distance, along the Zodiac — at length, changing from doubt... Page 43 - There remains the matter, which seems to me to deserve to be considered the most important in this work, namely, that I should disclose and publish to the world the occasion of discovering and observing four PLANETS, never seen from... Page 69 - Sun, that they consider that this theory of the constitution of the universe must be upset as impossible; for now we have not one planet only revolving about another, while both traverse a vast orbit about the Sun, but our sense of sight presents to us four satellites circling about Jupiter, like the Moon about the Earth, while the whole system travels over a mighty orbit about the Sun in the space of twelve years " (Siderevs Nvncivs, Venetiis, 1610, /. 30: The Sidereal Messenger, trans. Page 8 - ... stars in myriads, which have never been seen before, and which surpass the old, previously known, stars in number more than ten times. Bibliographic information
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