Every 5.4 years, the comet 46P/Wirtanen orbits the Sun, swinging through Earth’s skies on its way. This year, its visit is in December, and we’re going to be able to see it …
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‘Christmas Comet’
Comet 46P/Wirtanen is 2018’s brightest comet, but that doesn’t mean it’s bright. Although theoretically visible to the eye now, the comet is large and diffuse … not easy to see. …