Solving the mystery of how comets are born

29 July 2016 Astronomy Now

Detailed analysis of data collected from Comet 67P/Churyumov-Gerasimenko by ESA’s Rosetta spacecraft show that comets are the ancient leftovers of early solar system formation, and not younger fragments resulting from subsequent collisions between other, larger bodies.


Newly discovered distant solar system objects resonate with Neptune

22 July 2016 Astronomy Now

The search for distant solar system objects has found two more small worlds far outside the orbit of Neptune, beyond the Kuiper Belt. The new objects, 2014 FZ71 and 2015 FJ345, are in resonance with Neptune’s orbit, implying that these worlds either have interacted with Neptune in the past or are continuing to do so.