Neptune's windy atmosphere in August 1989. The ice giant Neptune was the first planet located through mathematical predictions rather than through regular observations of the sky.
well slavery was an big issue because it separated the northern and southern states. the northern states realize that slavery was an unnessary inhumane treatment and wanted to abolished it. While the southern states depended on slaves since they worked for free on their plantation. To resolve this they counted 3 free men for 5 slaves until 1808.
The Three-Fifths Compromise greatly augmented southern political power. In the Continental Congress, where each state had an equal vote, there were only five states in which slavery was a major institution. Thus the southern states had about 38 percent of the seats in the Continental Congress. Because of the 1787 Three-Fifths Compromise, the southern states had nearly 45 percent of the seats in the first U.S. Congress, which took office in 1790.