forum.sab-astro.fr

“It was a big surprise to detect iron and nickel atoms in the atmosphere of all the comets we have observed in the last two decades, about 20 of them, and even in ones far from the Sun in the cold space environment," says Jean Manfroid from the University of Liège, Belgium, who lead the new study on Solar System comets published today in Nature.

https://room.eu.com/news/scientists-une ... and-beyond

https://www.nature.com/articles/s41586-021-03435-0
https://www.nature.com/articles/s41586-021-03485-4

JJ