The main constituent is molecular nitrogen, though molecules of methane and carbon monoxide have also been detected. Pluto has a thin, tenuous atmosphere that expands when it comes closer to the Sun and collapses as it moves farther away – similar to a comet. The temperature on Pluto can be as cold as -375 to -400 degrees Fahrenheit (-226 to -240 degrees Celsius). Pluto's surface is characterized by mountains, valleys, plains, and craters. Due to its lower density, Pluto's mass is about one-sixth that of Earth's Moon. Interesting ices like methane and nitrogen frost coat the surface. Pluto is about two-thirds the diameter of Earth's Moon and probably has a rocky core surrounded by a mantle of water ice. Pluto officially became Pluto on March 24, 1930, when Burney’s suggestion was adopted and announced to the world.
18, after nearly a year of searching, Tombaugh discovered a possible moving object on photographic plates taken on Jan. Using a machine called a blink comparator, he rapidly shifted back and forth between views of each of the plates to create the illusion of movement of any objects that had changed position or appearance between photographs. Tombaugh’s task was to systematically image the night sky in pairs of photographs taken two weeks apart, then examine each pair and determine whether any objects had shifted position. The search for Planet X did not resume until 1929, when the job was handed to Clyde Tombaugh, a 23-year-old Kansan who had just arrived at the Lowell Observatory. In 1906, Percival Lowell, a wealthy Bostonian who had founded the Lowell Observatory in Flagstaff, Arizona in 1894, started an extensive project in search of a possible ninth planet, which he termed “Planet X.” By 1909, Lowell and Pickering had suggested several possible celestial coordinates for such a planet. This period in astronomy was one of intense planet hunting, and Pickering was a prolific planet predictor. Tombaugh, with contributions from William H. 18, 1930 at the Lowell Observatory in Flagstaff, Arizona, by astronomer Clyde W. We strongly believe that the science and knowledge we pursue every day is a human pursuit strengthened through the participation of these historically minoritized groups.įor more information on the DLC and its members, visit the Department Life Committee page.Pluto was discovered on Feb. LPL is at the forefront of planetary and space sciences, and as such must stand as an ally to and in solidarity with its community members regardless of race, national origin, immigration status, ethnicity, sex, gender identity and expression, sexual orientation, age, intellectual and physical ability, income, faith and non-faith perspectives, socio-economic class, political ideology, education, primary language, family status, military experience, cognitive style, and communication style, and with all people who intersect these groups. LPL strives to address inherent problems that exist within planetary science, and academia in general. We at the Lunar and Planetary Laboratory (LPL) value diversity in all of its forms. Science can succeed only if there is diversity-diversity of ideas, of perspectives, and of individuals.
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