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Citizen scientists just discovered the most powerful 'odd radio circle' twins in space we've ever seen
The largest of three newly found ring shaped structures in the cosmos are almost a million light-years across.
ORCs are vast, faint rings of radio energy that surround galaxies and can be detected only in radio wavelengths of the ...
It can be confusing to drive in a roundabout or traffic circle. Here are the rules to follow, and the differences between the two.
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