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THE ASTRONOMICAL MESSENGER
Containing and setting forth Observations lately made with the
aid of a newly invented Telescope respecting the Moon's
Surface, the Milky Way, Nebulous Stars, an
innumerable multitude of Fixed Stars, and
also respecting Four Planets never before
seen, which have been named
aid of a newly invented Telescope respecting the Moon's
Surface, the Milky Way, Nebulous Stars, an
innumerable multitude of Fixed Stars, and
also respecting Four Planets never before
seen, which have been named
THE COSMIAN STARS.[1]
Introduction.In the present small treatise I set forth some matters of great interest for all observers of natural phenomena to look at and consider. They are of great interest, I think, first, from their intrinsic excellence; secondly, from their absolute novelty; and lastly, also on account of the instrument by the aid of which they have been presented to my apprehension.
The number of the Fixed Stars which observers have been able to see without artificial powers of sight up to this day can be counted. It is therefore- ↑ The satellites of Jupiter are here called "the Cosmian Stars" in honour of Cosmo de' Medici, but elsewhere Galileo calls them "the Medicean Stars." Kepler sometimes calls them "the Medicean Stars," but more often "satellites."
