Please help me with this history question I’ll mark you brainiest if you know it

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.

According to some historians which marks at the beginning of the us civil war

Which of the following is an example of the legislative branch checking the judicial branch in the us government