Dark days...

Cosmological weather report...

"Although nothing can move through space faster than the speed of light, there’s no limit on how fast space itself can expand.

A hundred billion years from now, any galaxy that’s not resident in our neighborhood will have been swept away by swelling space for so long that it will be racing from us at faster than the speed of light. Light emitted by such galaxies will therefore fight a losing battle to traverse the rapidly widening gulf that separates us. The light will never reach Earth and so the galaxies will slip permanently beyond our capacity to see, regardless of how powerful our telescopes may become.

Because of this, when future astronomers look to the sky, they will no longer witness the past. The past will have drifted beyond the cliffs of space. Observations will reveal nothing but an endless stretch of inky black stillness."

(From NYTimes article "Darkness at the Edge of the Universe" by Brian Greene, photo by Lynne Silverman)