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
Fear of a Black Planet Fear of a Black Planet Fear of a Black Planet is the third studio album by American hip hop group Public Enemy. It was released on April 10, 1990, by Def Jam Recordings and Columbia Records. For the album, Public Enemy's Bomb Squad production team sought to expand on the dense, sample-layered sound of the group's 1988 record "It Takes a Nation of Millions to Hold Us Back". Having fulfilled their initial creative ambitions with that album, Public Enemy aspired to create what lead rapper Chuck D called "a deep, complex album". Their songwriting was partly inspired by the controversy