Arecibo is monitoring potentially hazardous near-earth asteroid

3200 Phaethon is thought to be the parent body for the Geminid meteor shower, which gave a pretty fantastic show recently mid-December. According to the Universities Space Research Association (USRA), Arecibo’s radar images of the asteroid show its spherical shape and a several-hundred-meters large concave area, as well as a “conspicuous dark, circular feature near …

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