An unexpected spiral structure has been spotted in the material
around the old star R Sculptoris—seen above in a picture released
October 10 by the European Space Observatory's Atacama Large Millimeter/submillimeter Array (ALMA).
The mysterious structure "has never been seen before and is probably
caused by a hidden companion star orbiting the star," according to the
observatory.
In the above picture—the first 3-D depiction of
such a spiral—the shell around the star shows up as the outer circular
ring. The image also depicts a very clear spiral structure in the inner
material.
Source:
http://news.nationalgeographic.com/news/2012/10/pictures/121012-space-science-mars-auroras-best-space-x-rover-217/?source=link_fb20121017news-spacepicinfb&utm_source=Facebook&utm_medium=Social&utm_content=link_fb20121017news-spacepicinfb&utm_campaign=Content
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