This is the first official Windows 8 theme from Microsoft: Nightfall and starlight panoramic is an awesome set of wallpapers created to expand across dual monitors, also changes the Aero glass color on each image.
This theme comes with 9 panoramic wide-angle images of stunning places: Steep mountains, distant galaxies, verdant meadows, and the beautiful sea.
If you’ve been running Windows 8, you may already tried the Windows 7 themes and they are totally compatible. However, Windows 8 themes are not compatible with Windows 7, they even have different file extensions: *.themepack for Win 7 and *.deskthemepack for Win 8. Now, if you want to display this images in your Windows 7 PC, you still can, just rename the file from *.deskthemepack to *.zip, then simply extract the images from the compressed file.