It's only the second observed "interloper" to cross into our solar system, but interstellar comet 21/Borisov looks incredibly similar to our own comets based on new observations by astronomers. They're also learning new details about the comet, like the fact that it has a reddish hue, according to a new study.
from CNN.com - RSS Channel - App International Edition https://ift.tt/2MEVjtZ
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