Genius. If you vaporize them they can’t melt.

I hear Greenland has WMDs - in the form of melting glaciers that will cause some kind of climate catastrophe. /s

They do. The problem is that controlled burns are by definition small so they can be controlled and there’s a lot of forest.

Seeing an annular eclipse is an excellent application of orbital mechanics! Enjoy!

Drop a ball. It goes fastest just before and after it hits the ground, and slows down until it gets back to near the height you dropped it from

The probe is the ball, and slingshotting around the sun is like bouncing off the ground. The potential energy (height of ball/distance from sun) gets converted to and from kinetic energy (speed).