There is also no wind resistance on the moon. Two guys in bulky space suits man-handling an aluminum pole and a piece of nylon are going to jiggle it to get it in the moon's surface. Once the flag starts moving, if they brush against it, for instance, there is no air resistance to slow it down. read more
Solar wind is the radiation produced by the sun and it effects earth by warming the surface its effects would be much more severe if we didn't have an EM field protecting us from the majority of this radiation Mars is a good example of what would happen if we didn't have one as it's atmosphere was blown away over time which is why it's so thin and the surface is constantly bombarded by deadly radiation. read more