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When the International Astronomical Union (IAU) adopted a new definition of a "planet" in August 2006, Pluto became a dwarf planet, drawing a divisive line in s

People, children especially, have been baffled, bewildered, and even outraged by the fact that Pluto is no longer called a planet. Through whimsical artwork and

Your updated guide to exploring the night sky Do you know the difference between a red giant and a white dwarf? From asteroids to black holes, this easy-to-unde

This title was first published in 2002: Examining the recent phenomenon in conflicts in Africa, this text addresses situations where African states and African

An exciting introduction to astronomy, the fourth edition of this book uses recent discoveries and stunning photography to inspire non-science majors about the