Yes, yes, phallic phlying of the phreindly astro-phields. But it's not the bulbous ship entering the ovuloid planet (ooh er) that is the silliest thing on this cover.
No, it's the stylized title/author's name that really gets stuck in my craw (ooh er). That looks nothing so much as something a pimply teenaged boy would draw for his favorite metal band, Charles Sheffield, and the band's new album Convergent Series. When it takes me several seconds of staring at the cover to make out that name (and trying to parse Seires), well, that right there is a cover fail. Ooh er.