The correct answer is option B.
Edmond Halley correctly predicted the return of the eponymous comet Halley after he realized several sightings of a comet were in fact the same comet.
By correctly understanding Sir Isaac Newton's law of gravity and also his ideas in mathematics, Halley was able to correctly predict that the comet that now bears his name would return periodically. He did this by discovering Halley's orbit in 1716 and thus being able to predict the year of its return.
Answer:
<em>Even today, at the beginning of the 21st century, sectionalism continues with geographic sections still battling for dominance, and cultural sections square off in what is commonly called the culture wars</em>
Answer:
A. Alaska
Explanation:
On March 30, 1867, Secretary of State William H. Seward agreed to purchase Alaska.
At the end of the Texas Revolution, Texas immediately became an independent country for around nine years before becoming a part of the United States. Therefore the answer is D.