Astronomy is an ancient science on the cutting edge. Great discoveries were made centuries ago. Great discoveries are being made today. And great leaps forward in astronomical knowledge have often followed leaps forward in technology: the invention of the telescope, the invention of the computer, the development of fast, cheap computers. So much is being learned every day that we’ve been asked to bring out a revised edition of this book, the first edition of which came out only two years ago. And even more recent discoveries will be on the table by the time you read this new edition.
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