Space and Sky Wallpapers HD

空間美麗和令人驚嘆的圖像和天空為你的手機屏幕

Beautiful and stunning images of space and skies for your phone and tablet. From aurora borealis to nebula, selected images of stars and galaxies

Space is the boundless three-dimensional extent in which objects and events have relative position and direction.Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. The concept of space is considered to be of fundamental importance to an understanding of the physical universe. (wikipedia)

All images are available under public domain license