Posts tagged “astronomy” 2

Hubble Ultra-Deep Field

One of my favorite things in the world.

Located southwest of Orion in the southern-hemisphere constellation Fornax, the rectangular image is 2.4 arcminutes to an edge, or 3.4 arcminutes diagonally. This is approximately one tenth of the angular diameter of a full moon viewed from Earth (which is less than 34 arcminutes), smaller than 1 sq. mm piece of paper held at 1 meter away, and equal to roughly one twenty-six-millionth of the total area of the sky. The image is oriented so that the upper left corner points toward north (−46.4°) on the celestial sphere.

Wikipedia (emphasis mine)

Here’s all that in video form

The best screensaver in the world using red-shift data

And a very high-resolution image (> 60MB). Wallpapers are available.

Our shit is so, so, so tiny.

There are over 100 billion galaxies in the universe. Simply saying that number doesn’t really mean much to us because it doesn’t provide any context. Our brains have no way to accurately put that in any meaningful perspective. When we look at this image, however, and think about the context of how it was made and really understand what it means, we instantly gain the perspective and cannot help, but be forever changed by it.

We pointed the most powerful telescope ever built by human beings at absolutely nothing for no other reason than because we were curious, and discovered that we occupy a very tiny place in the heavens.

Deep Astronomy

Not so sure about “instantly” gaining perspective but the rest about wonder and curiosity and our insignificant place the heavens still stand.

Light Pollution Map

DarkSiteFinder is a map of light pollution around the world.

The maintainer explains why he doesn’t use the Bortle Scale. In Iowa, Lake Sugema and The Whiterock Conservancy appear to be the ‘best’ places to see some (more) stars.