The correct answer is B. They were able to find the orbit of a comet and predict the year of its return.
Edmond Halley was a British astronomer, geophysicist, mathematician, meteorologist, and physicist. Alexis Clairaut was a French astronomer, geophysicist, mathematician.
They were friends with Isaac Newton that before, had built a new theory of universal gravitation.
With this new theory, Newton calculated the orbit of the Great Comet of 1680. Later, Halley used Newton’s theory to calculate the orbits of several comets - even some that were in ancient records -. The thing is: Halley noticed that some comets had similar orbits, which led him to suggest that some comets may be periodic and that they may be moving along very elongated ellipses. This way he forecasted the comets return in a period of 76 years.
Since then, the comet has carried Halley’s name.
Answer:
This system was called as a factory system and was a part of the industrial revolution in the United States.
Explanation:
your welcome!
Answer:
October 25, 1764
Explanation:
He got married to abigail adams
Alice Paul helped pioneer the movement. She was the one sitting out of president Woodrow Wilson’s (?) White House during the war, standing up for women’s rights, all though suffragettes didn’t think it would work and men where backlashing them. (I don’t remember the president or what war at the time so you might want to fact check me)
In 1989, a group of students led a protest in Tiananman Square, in Central China. After the Cultural Revolution has ended with the death Mao Zedong in 1979, there was economic and civil unrest. Because of this movement spearheaded by Mao, China faced poverty that they had never seen before. Shortly before his death Dong Xioaping was made the de facto leader of China in 1978. Reforms were set up by him and this led to a huge downturn. Deaths of prime political figures and a disembodied education system were to follow in only 11 years time. In 1989, a group of brave students took arms in the forms of words and signs to protest to demand scholarships for higher education, these "riots" were seen by the un-democratic and corrupt government of China as a threat, and military action was taken. It resulted in a huge causality rate, that of a massacre.
Know Tank Man? Research him, I'll think you'll recognize him.