New sky map most detailed ever!

The results of the 2MASS Redshift Survey – looking at our local (380,000,000 light years) universe – have been published. This is the most detailed 3D map of our nearest galactic neighbours – with 43,000 galaxies plotted with the correct positions and speeds.

Redshifting is the way in which a galaxy’s light is stretched into longer wavelengths by the expansion of the universe. The farther a galaxy is from Earth, the greater its redshift. By analyzing those measurements, the 2MRS was able to achieve that important third dimension, and to produce the map you see above.

You can get more information from this PopSci article along with a High Res version of the picture..

Mr G

Source: PopSci


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