#1, but I would reduce the size of the alien and possibly the size of the planet, because it creates a significant amount of empty space at the top, and if it's used in layout on web pages it's going to mean bumping a lot of content below the bottom of the window, which makes it look like the site is getting less activity. Using a logo with a lot of white space wastes a lot of valuable space, especially on smaller screens like phones.
Actually, I might even put the alien standing behind the "n" instead of on the planet.