Rosetta witnesses birth of baby bow shock

[Still Waters]

A new study reveals that, contrary to first impressions, Rosetta did detect signs of an infant bow shock at the comet it explored for two years – the first ever seen forming anywhere in the solar system.

From 2014 to 2016, ESA's Rosetta spacecraft studied Comet 67P/Churyumov-Gerasimenko and its surroundings from near and far. It flew directly through the 'bow shock' several times both before and after the comet reached its closest point to the sun along its orbit, providing a unique opportunity to gather in situ measurements of this intriguing patch of space.

https://phys.org/news/2018-12-rosetta-witnesses-birth-baby-comet.html