In the history of astronomy, which of the following is true? Question 4 options:

Ptolemy argued that the sun was the center of the universe.

Isaac Newton was criticized for his work on the geocentric model.

Galileo Galilei built one of the first observatories.

Johannes Kepler was a student of Tycho Brahe.

Education, opportunity, land and regular pay.

Explanation:

The Buffalo Soldiers, as they were called, are those African American solders who served in the 10th Cavalry. They served along the Texas frontier from Fort Richardson along the Red River to Fort Bliss in present day El Paso.

Buffalo Soldiers were so named as the native Americans who they were guarding, admired their (black's) fighting abilities and found their hair similar to that of the buffalo. Also, they are skillful in fighting even when cornered. Most of these soldiers were former slaves without any family. Joining the military was a great escape for them, away from their former lives as slaves. Besides, it also ensures a chance for education, land and regular income, along with other opportunities to improve their lives and be more than what they used to be before.