Scientists have observed a collision of two of the universe's most extreme objects. And a mission to Jupiter's moon Europa makes an important step forward.

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Sources:

https://www.sciencemag.org/news/2019/08/scientists-may-have-spotted-black-hole-and-neutron-star-colliding
http://astronomy.swin.edu.au/cosmos/N/Neutron+Star
https://phys.org/news/2014-06-binary-stars-common-thought.html

https://spacenews.com/europa-clipper-passes-key-review/
https://europa.nasa.gov/about-europa/ocean/
https://spacenews.com/europa-clipper-instrument-change-could-affect-mission-science/
https://www.scientificamerican.com/article/nasa-has-committed-to-a-rocket-for-the-europa-mission-and-it-wont-be-ready-on-time/