The question has been asked by many millions of people spanning recorded time, but we are no closer to the answer today than we were hundreds or even thousands of years ago. We need to finally get a handle on this and start exploring!
NASA released on the web this week, on Tuesday, the first pictures of the planet Mercury from the Messenger space probe. This is American tax dollars paying back wonderfully, as America's space agency technology and scientists show us, and the world, what it looks like out there in space.
INMO, Mercury, with is craters, looks a bit like our moon. Well, a lot like our moon