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The First Known Interstellar Comet
http://www.skyandtelescope.com/astro...stellar-comet/
Wow, this is fascinating... "... an object swept up just a week ago by observers using the PanSTARRS 1 telescope atop Haleakala on Maui has an extreme orbit — it's on a hyperbolic trajectory that doesn't appear to be bound to the Sun. Preliminary findings, published earlier today [10/25/2017] by the International Astronomical Union's Minor Planet Center (MPC), suggest that we are witnessing a comet that escaped from another star." |
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