4K HD Wallpaper: Aurora Borealis
The most famous and beautiful natural lights show that can be seen from Earth was captured in this 4K picture by Pier Nirandara and from her courtesy can be downloaded from here to be used as desktop background and homescreen phone.
Widescreen Desktop / Macbook: 2560x1600 (fits on: 1920x1200, 1440x900, 1280x800)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x1536 (compatible with almost all tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many smartphones)