re: Where is a tractor beam when you need one?
Wow! It is amazing that we can get a craft on Mars, not to mention getting a lander in a certain area. Even more amazing was the Voyagers going from planet to planet.
It is a big solar system and I am very impressed that we can send probes and landers to other worlds.
Thanks for the explanation. It makes a lot of sense. Let see if I have this straight. The Earth is going faster than Mars, but a craft leaving the Earth to get to Mars has to accelerate to a higher orbit (Reminds me of electron orbits and how electrons will jump up an orbit when energy is increased) because of the Sun’s gravity. And visa-vera on coming from Mars back to the Earth.