"In images, it doesn’t look like much: just a blue dot
against the black of space. What’s exciting about this
little planet is that it has somehow manage to escape
its star.

Even getting an image of the object, dubbed
CFBDSIR2149, is a pretty good trick: CFBDSIR2149
is only visible in the infrared, and then, only just (it
appears blue in the image because methane in its
atmosphere absorbs much of its longer infrared
wavelengths, the ESO says).

Astronomers using the European Southern
Observatory’s Very Large Telescope (VLT) in Chile
worked with the Canada-France-Hawaii (CFH)
Telescope in Hawaii to capture the image of the free-
floating planet, which is around 100 light years away.
The CFH instruments first spotted CFBDSIR2149,
and the VLT was called on to examine its properties."

See:

http://www.theregister.co.uk/2012/11...potted_by_eso/