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Research works
The Voyager probes have left the solar system and will explore what is beyond.
http://gepi.obspm.fr/pole-scientifique/physique-stellaire-et-galactique/actualites-49/article/voyager-1-and-2-first-measurements
At the edge of the Solar System, there is a multitude of icy stones.
https://www.obspm.fr/le-fin-fond-du-systeme-solaire-selon-herschel.html
Eight planets? We shall have to think again...
https://www.obspm.fr/a-la-recherche-de-la-neuvieme.html
