All summer long, we've been on a 10-episode odyssey through the changing universe (check out the series). But there was one big set of objects that we skipped over: moons.

While there were many caveats in linking the discovery directly to proof of life on Venus, it still set both the scientific community and the public abuzz with new wonder. Missions to space can be ...

About 2.2 degrees apart, or about four full moons, according to Sky at Night. All this month, six planets will be visible in the night sky, four of them with the naked eye.