Pure visual perfection. Been using this theme for over 10 years now, aiming at 10 more.

While this theme is an obvious derivative of the Windows 7 - "Homeworld" theme that did the rounds a few years back (and was also adapted for WMC), it's a popular choice. Also being a space-fanatic, this fits in well with the look I want for my main browser.

What the others said. Good job of making the text grey.

A simple theme that looks good even if there isn't enough space to see the whole image.