The loop was seen using the European space telescope XMM-Newton to study it in X-ray wavelengths.

BBC: Arches Cluster, Leicester

Most of those who took part in the study reported having at least one X-ray a year.

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It's now set for launch in 2017, when it will be joined by the Neutron Star Interior Composition Explorer (NICER), an addition to the International Space Station also selected as part of the Explorer program last week that will use a process called X-ray timing to study neutron stars.

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One of the interesting means the physicists article focuses on is the use of proton-induced x-ray emission (PIXE), which allows for a non-destructive study of art objects.

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When you have selected the type of scientific study of a painting or sketch, a simple slider movement left or right takes you on an X-ray journey through one of the master's works.

BBC: 8bitpeoples