(Encyclopedia) anomalistic yearanomalistic yearənŏmˌəlĭsˈtĭk [key], time required for the earth to go from the perihelion point once around the sun and back to the perihelion point. It is 365 days, 6…
(Encyclopedia) Dovzhenko, AleksandrDovzhenko, Aleksandrəlyĭksänˈdər dōvzhĕnˈkō [key], 1894–1956, Soviet film director, b. Ukraine. He ranks with Eisenstein and Pudovkin as one of the greatest Soviet…
(Encyclopedia) Heinlein, Robert Anson MacDonaldHeinlein, Robert Anson MacDonaldhīˈlīn [key], 1907–88, American science-fiction writer, b. Butler, Mo. His best-known novel, Stranger in a Strange Land…
(Encyclopedia) Jovian planets, the planets Jupiter, Saturn, Uranus, and Neptune. They are all larger and more massive than the earth. Since they rotate faster, they are more flattened at the poles…
(Encyclopedia) sky, apparent dome over the earth, background of the clouds, sun, moon, and stars. The blue color of the clear daytime sky results from the selective scattering of light rays by the…
What is a tsunami? The phenomenon we call tsunami is a series of large waves of extremely long wavelength and period usually generated by a violent, impulsive…
Dec. 21, 2016 5:44 A.M. EDT (10:44 UT), marks the solstice—the beginning of winter in the Northern Hemisphere and summer in the Southern Hemisphere by Ann-Marie Imbornoni…
About 8,000 mini-quakes a day, and on average, one exceptionally big one per year by Borgna Brunner Earthquakes in residential areas, such as this 1964 one in Seward, Alaska, can…
What is this job like? Do you know where your backyard ends and your neighbor's yard begins? Have you ever wondered how maps are created? These are questions for a surveyor. Surveyors measure and…
Source: U.S. Dept. of the Interior, Geological Survey About 550 volcanoes have erupted on Earth's surface since recorded history; about 60 are active each…
