Hubble Deep Field - not new, but still awesome

Imagine how much of the sky a tennis ball would blot out if it were positioned one hundred metres above your head. That's roughly the area photographed in the image below. It was taken over ten days in December 1995 by the Hubble Space Telescope.

Each of those blurs, dots and smears are galaxies. Not stars. Galaxies. In that tiny patch of sky, which could be hidden behind a grain of salt held at arms length, you'd be hard put to count them all easily. The number of galaxies in the universe must be unfathomable.

And that's a humbling thought.