<span>Eisenhower Doctrine, (Jan. 5, 1957), in the Cold War period after world War II, U.S. foreign-policy pronouncement by President Dwight
D.Eisenhower promising military or economic aid to any Middle Eastern country needing help in resisting communist aggression.</span>
McCarthyism, name given to the period of time in American history that saw Wisconsin Sen. Joseph McCarthy produce a series of investigations and hearings during the 1950s in an effort to expose supposed communist infiltration of various areas of the U.S. government.
Answer:
Julius and Ethel Rosenberg
Explanation:
Julius and Ethel were married in 1939. They were member of the communist party. Ethels brother worked on the Manhattan Project and provided them with information. The Rosenbergs in turn gave that information to Harry Gold.
Julius & Ethel were the first american non military who were every put to death for being spys
The event that convinced Brahe that neither the Heliocentric nor the Geocentric models were correct was <u>D. The conjunction of Jupiter and Saturn</u>.
<h3>Who was Tycho Brahe?</h3>
Tycho Brahe was an astronomer famous for developing astronomical instruments and his accurate and comprehensive astronomical observations.
Trained as a lawyer, Brahe turned to astronomy in 1563 when he observed the conjunction of Jupiter and Saturn.
Brahe's observations of Jupiter and Saturn showed that existing astronomical tables produced under the Heliocentric and geocentric models were inaccurate.
<h3>What was the Heliocentric astronomical model?</h3>
In the Heliocentric astronomical model championed by Nicolaus Copernicus, the Sun lies at or near a central point of the solar system or the universe while other planets revolve around it.
<h3>What was the Geocentric astronomical model?</h3>
Under the geocentric model or Ptolemaic system, the Sun and other planets orbit Earth.
Thus, the event that convinced Brahe that neither the Heliocentric nor the Geocentric models were correct was <u>D. The conjunction of Jupiter and Saturn</u>.
Learn more about Jupiter and Saturn at brainly.com/question/24827761
#SPJ1
