text: The second reason the author supports the idea is in paragraph two. He says "Each mission was unmanned, and for a good reason, since no spacecraft survived the landing for more than a few hours." This shows when the author says "For a good reason" that he is trying to say he supports the idea of us trying to study more about Venus, but is glad we are approaching it at a safe distance, and unmanned. This is another reason he is telling us that it is good to study, but dangerous.