5 ene. 2017

When is a Comet not a Comet? Asteroid 2016 WF9 Blurs the Line between Comet and Asteroid

 A new asteroid was discovered by the Wide-Field Infrared Survey Explorer (WISE) mission in November of 2016, designated 2016 WF9. While the mission finally decided to designate the object as an asteroid a few days later, 2016 WF9 presented an interesting puzzle: while it appears to be a comet in structure, it also lacks the dust and gas cloud that is characteristic of what we expect from comets.

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