That's very true, if earths Gravity was just a bit stronger chemical rockets couldn't even make it to orbit. Like right now we can only get 5 to 10 percent of v

That's very true, if earths Gravity was just a bit stronger chemical rockets couldn't even make it to orbit. Like right now we can only get 5 to 10 percent of vehicle mass to orbit, imagine if that where 1 or .001 percent. That would make space exploration incredibly expensive. It's already prohibitive at our level of gravity.