The person who compiled the large set of accurate observations of planetary positions that formed the basis for proving that planets move in elliptical orbits around the sun was

Correct

Explanation:

Tycho Brahe (1546-1601) was a Danish astronomer who in his later years became official astronomer for Holy Roman Emperor Rudolph II.  He built an observatory there in Bohemia from which he made extremely detailed and accurate records of planetary positions.  Brahe's own theory of planetary motion was that both the earth and the sun were centers -- that the sun revolved around the earth but the other planets revolved around the sun.  Johannes Kepler served as Brahe's assistant. After Kepler's death, Kepler used Brahe's data on the planets' positions to show that all the planets (including earth) moved around the sun in elliptical orbits.

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.