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.
While the compromise on representation was a critical turning point at the Convention, the issue of slavery was just as important. While Northerners were, to varying degrees, opposed to the South's peculiar institution, Southerners believed that their economic well-being depended on the slave trade.