Thursday, August 18, 2011

Lyman-alpha blob: The green blob on the other side of the universe that's bigger than the Milky Way galaxy - 17th Aug 2011

A team of scientists have described how they came face to face with... The Blob.

It may sound like the title of a B-movie, but astronomers have captured rare images of a space object called a Lyman-alpha blob.

The object is a gigantic cloud of hydrogen gas stretching across 300,000 light years of space and several times larger than our galaxy, the Milky Way.

Lyman-alpha blobs emit as much radiation as the brightest galaxies and are found at great distances.

The blob placed under the gaze of the European Southern Observatory's Very Large Telescope (VLT) was one of the first to be discovered in 2000.

Lyman-alpha blob 1 (LAB-1) is so far away that its light has taken 11.5billion years to reach Earth - most of the time the universe has existed. Read More