In 2020, NASA plans to build a space station and launch pad on the moon, with a long-term goal of sending humans to Mars. Why would it be more desire able to launch a spacecraft from the moon instead of Earth?

It is more desirable to laugh a spacecraft from the moon because of the lower amount of gravity affecting the spacecraft and the easier take off because of the lack of heat transfer while leaving the moons “atmosphere” (the moon does not have one and therefor the spacecraft would not lose heat by exiting or entering the moon)

The answer is the magnetosphere.