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 compromise was to count only 3/5 of the slaves in determining how many representatives to allocate to each state. ( how the slave population would be counted ) The Three-Fifths Compromise was made in the US Constitutional Convention. Slave states wanted to count their entire slave population in determining how many representatives each state had in the House of Representatives.