3. The setting should be authentic, based on what seems like real science.

Nobody strolls around the craters of the moon in their pajamas - they would die in moments in the hard vacuum of space.  And no one gets jungle rot in the swamps of Venus, although not many years ago the science of the day said that the clouds of Venus probably covered tropical oceans and swamps - as in the magazine cover at the right.  Writing a story about either of these things would be like having someone strolling past the Eiffel Tower in lower Manhattan.

4. Except perhaps in hard science fiction, scientific "facts" should be woven into the story in an unobtrusive way.  Just like the fog in a story about London or covered wagons in a story about the Oregon Trail, we don't need a lecture pointing them out and explaining them.

So, how do we get the science into science fiction?