Spinning 390 times a second, the "black widow" pulsar PSR J1311−3430 periodically swings its radio (green) and gamma-ray (magenta) beams past Earth in this amazing space wallpaper.

This space wallpaper shows an artist's impression of the black holes studied by astronomers, using ULTRACAM attached to ESO's Very Large Telescope. The systems — designated Swift J1753.5-0127 ...

Over the last few years, Basic Apple Guy has delivered amazingly detailed iPhone and MacBook Pro Schematic wallpapers. Now celebrating the new Space Black MacBook Pro, he’s released an all-black ...

As to why Microsoft is charging 99 cents for the pack it is likely to do with licensing. Last I checked, Microsoft is not operating a deep-space telescope, and such images in 4K are rarely free ...