Atmosphere of Uranus at the solstice of 1986, when "Voyager 2" passed by the planet, they were concentrated near the sunlit pole, making it dark in ultraviolet light. The outermost layer of the Uranian atmosphere, extending for thousands of kilometres, is the thermosphere/exosphere, which has a uniform temperature of around 800 to 850 K. This is much higher than, for instance, the 420 K observed in the thermosphere of Saturn. The heat sources necessary to sustain such high temperatures are not understood, since neither solar FUV/EUV radiation nor auroral activity can provide the necessary energy. The weak cooling efficiency due to the depletion
Bad Astronomy praised "Bad Astronomy" as the "ideal accompaniment for International Astronomy Day (April 20)" and quoted the author, stating that it is "dangerous to be ignorant about science. Our lives and our livelihoods depend on it." In an October 2002 review for "Sky & Telescope", Bud Sadler praised "Bad Astronomy" for its humor, "easily understood explanations" and "simple demonstrations" to explain what he called "the most egregious examples of ill-informed astronomy." Part I of "Bad Astronomy", "Bad Astronomy Begins at Home," focuses on examples of astronomical misconceptions that are typically associated with the household or classroom, including the effect of the