The #ALMA survey to Resolve exoKuiper belt Substructures (ARKS), has produced the sharpest images ever of 24 debris discs, the dusty belts left after #planets finish forming.
These discs are the cosmic equivalent of the teenage years for planetary systems – somewhat more mature than newborn, planet-forming discs, but not yet settled into adulthood.
Debris discs are representing the collision-dominated phase of the #planet formation process.
With ALMA, astronomers are able to characterise the disc structures pointing to the presence of planets. In parallel, with direct imaging and radial velocity studies, searches for young planets in these systems is possible.
Solar System’s counterpart to this phase is the #Kuiper Belt, a ring of icy debris beyond #Neptune that preserves a record of massive collisions and planetary migrations from billions of years ago.
By studying 24 exoplanetary debris belts, the ARKS team has opened a window into what our Solar System went through as the Moon was forming and as planets jostled for their final places, and sometimes trading orbits.
#astronomy #exoplanets
https://www.mpia.de/news/science/2026-01-arks-survey
Eutelsat lève 1,5 milliard d’euros et l’État devient le premier actionnaire
https://next.ink/brief_article/eutelsat-leve-15-milliard-deuros-et-letat-devient-le-premier-actionnaire/
« La participation de l’État au capital d’Eutelsat est désormais de 29,65 %, ce qui en fait le premier actionnaire »,
Cette levée de fonds doit permettre le « développement d’Eutelsat dans le domaine des constellations LEO, segment stratégique pour les télécommunications de demain et dont le marché connaît un fort développement ». Un segment où Starlink de SpaceX est déjà en place et sur lequel Amazon Leo (ex-Kuiper) se prépare aussi, au grand dam des syndicats.
#Starlink #Eutelsat #constellation #spacex #amazonleo #kuiper
RE: https://social.heise.de/@heiseonlineenglish/115610977592929242
#Amazon's satellite 🛰️ constellation currently consists of just over 150 satellites. By 2028, Amazon plans to expand it to over 3000 satellites.
Initially, the service is to be available in five countries: #Germany, #France, #GreatBritain, #Canada, and the #USA
Le service Amazon Leo (anciennement projet Kuiper) est une constellation de satellites en orbites basses, comme Starlink, qui va permettre de se connecter à Internet partout sur la planète. Et Amazon a de grands projets pour sa solution. La première ...
Azken jaurtiketak, bi #Falcon9 suziri izan dira:
#Starlink6-79 misioa, #B1090-9 propultsatzailea erabiliz, 29 sateliterekin.
#Starlink11-30 misioa, #B1100-1 propultsatzailea erabiliz, 28 sateliterekin.
Amazon-en #Kuiper satelite konstelazioa, orain #AmazonLeo izena izango du.
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