Add Yahoo as a preferred source to see more of our stories on Google. Earlier this year, researchers at NASA released an image of “sibling” galaxies “fighting” amongst themselves. It was a stunning ...

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Scanning through data fresh off the telescope, we saw two ghosts dancing deep in the cosmos. We had never seen anything like it before, and we had no idea what they were. Several weeks later, we had ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. Ray Norris, Professor, School of Science, Western ...