MARRIED. Margaux Hemingway, 24, occasional actress; and French-born Film Maker Bernardo Foucher, 40; she for the second time, he for the fourth; in Margaux's native Ketchum, Idaho.

SEPARATED. Mary Tyler Moore, 42, TV sitcom queen of the '70s; and TV Producer Grant Tinker, 53; after 17 years of marriage.

DIED. Lieut. Colonel John A. ("Shorty") Powers, 57, whose minute-by-minute reports on America's first manned space launches made him "the voice of the astronauts" in the early 1960s; of a gastrointestinal hemorrhage; in Phoenix. Powers was a much decorated pilot in World War II, the Berlin Airlift and the Korean War before rocketing to fame as a NASA spokesman beginning in 1959. As Project Mercury's earth-bound "eighth astronaut," he contributed the phrase A-O.K. to the nation's vocabulary.

DIED. Joy Adamson, 69, Austrian-born naturalist who wrote the bestselling Born Free; after being attacked by a lion; on a remote game reserve in Kenya (see WORLD).

DIED. Richard Rodgers, 77, composer whose collaborations with Lyricists Lorenz Hart, Oscar Hammerstein II and others roused Broadway with The Sound of Music, Carousel, Pal Joey and three dozen other shows for six decades; in New York City (see MUSIC).

DIED. The Rev. John Joseph Cavanaugh, 80,

Roman Catholic priest who served as president of the University of Notre Dame during its postwar expansion (1946-52) and who, as a friend and curate to the Kennedy family, said a Requiem Mass for the assassinated President at the White House in 1963; in South Bend, Ind.

DIED. Pietro Nenni, 88, Italian Socialist who, with Christian Democrat Alcide de Gasperi and Communist Palmiro Togliatti, founded the postwar Italian Republic; of a heart attack; in Rome. At 20, the silver-tongued Nenni was jailed for protesting Italy's invasion of Libya; his cell mate was Benito Mussolini, then a fellow Socialist. When il Duce came to power, Nenni, an ardent antiFascist, fled to France and later joined the Loyalist forces in the Spanish Civil War. After World War II he served as Deputy Prime Minister and Foreign Minister in Italy's first postwar government. His alliance with the Communist Party and his opposition to NATO earned him the Stalin peace prize in 1951; he repudiated the award five years later, after the Soviets smashed the Hungarian revolution. In 1962 Nenni's Socialists joined the Christian Democrats in a center-left coalition that ruled for 14 years, during which he served as Deputy Prime Minister in three Cabinets.

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