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 issue of how to count slaves split the delegates into two groups. The northerners regarded slaves as property who should receive no representation. Southerners demanded that Blacks be counted with whites. The compromise clearly reflected the strength of the pro-slavery forces at the convention.