西内SINE

通过珀西瓦尔·洛厄尔所做的测算，克莱德·汤博在1930年发现了冥王星。他把它叫做冥王星，就像冥王一样。因为冥王星是距离太阳最远的行星。
With computations Percival Lowell made for where it should be, Clyde Tombaugh discovered Pluto in 1930. He called it Pluto, like the god of the Underworld. Because Pluto is the planet most distant from sunlight.

●克莱德·汤博传记
●Clyde W. Tombaugh biography

●洛厄尔天文台
●Lowell Observatory

●十天天气预报
●10 day weather forecast