They were more politically motivated
Popular fervor led President Lincoln to push a cautious Brigadier General Irvin McDowell, commander of the Union army in Northern Virginia, to attack the Confederate forces commanded by Brigadier General P.G.T. Beauregard, which held a relatively strong position along Bull Run, just northeast of Manassas Junction.
Nicolaus Copernicus was the one who proposed the heliocentric theory.
