Why do you think early astronomers believed that the sun went around the sky and that Earth was the center of the universe?

The belief of early astronomers that the Earth was the center of the universe stemmed from limited astronomical tools and geocentric attitudes. The Ptolemaic Model, developed around 100 A.D., presented the Earth-centered solar system in which most early Roman astronomers believed.

In the early 1500s, Nicolaus Copernicus published the first major theoretical work that challenged the notion of an Earth-centered universe. Copernicus theorized a sun-centered universe, or a heliocentric solar system. In 1610, Galileo Galilei was able to use the first telescope to study the solar system. He strengthened the argument for a heliocentric system by noting changing levels of brightness during the rotations of certain planets as well as the Earth's moon and the sun.

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.

1.) irish.

2.) settlers could obtain cheap land nearby

3.) steam engine

explanation: