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Jupiter
Jovian MoonsThe Magnetosphere of Jupiter Jupiter is the largest planet in the solar system—a gaseous world as large as 1,300 Earths. Its equatorial diameter is 88,736 mi (142,800 km), while…Neptune
The Magnetic Field of NeptuneNeptune's MoonsThe Smaller Satellites Little was known about Neptune until Aug. 1989, when NASA's Voyager 2 became the first spacecraft to observe the planet.…Uranus
The Uranian Rings The Uranian Moons Uranus, the first planet discovered in modern times by Sir William Herschel in 1781, is the seventh planet from the Sun, twice as far out…“Inanimate, Wheeled, One-Armed Boxes” Responsible for Year's Most Exciting Scientific Discovery
—By Borgna Brunner Artist's rendition of the planetoid Sedna On March 15, 2004, astronomers confirmed the discovery of the most distant object ever identified in our solar system.…Mars
The Martian MoonsMeteorites from Mars Mars, on the other side of Earth from Venus, is Venus's direct opposite in terms of physical properties. Its atmosphere is cold, thin, and transparent,…Sedna
(Encyclopedia) Sedna, in astronomy, the most distant known large object in the solar system. With a highly eccentric elliptical orbit that ranges from an estimated 76 AU to 937 AU, Sedna also has an…apsis
(Encyclopedia) CE5 Apsis points, or apsides, in the earth's orbit: At perihelion the earth is closest to the sun and at aphelion it is farthest from the sun. apsis (pl. apsides), point in the…magnetic pole
(Encyclopedia) magnetic pole, the two roughly opposite ends of the planet where the earth's magnetic intensity is the greatest, as the north and south magnetic poles. For the magnetic north, it is…Moore, Michael
(Encyclopedia) Moore, Michael, 1954–, American documentary filmmaker, author, and activist, b. Flint, Mich. A highly personal, populist, and frequently controversial and polarizing documentary…Adelson, Sheldon Gary
(Encyclopedia) Adelson, Sheldon Gary, 1933-2021, American casino owner and political donor, b. Boston, MA. Adelson was born to poor, Jewish, Eastern European immigrants. After attending…Trending
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