Donnerstag, 22.10.2020 10:46 Uhr

Exoplanets of our Milky Way

Verantwortlicher Autor: Benjamin Graf-Lubec Vienna, 23.03.2020, 19:07 Uhr
Nachricht/Bericht: +++ Special interest +++ Bericht 5415x gelesen

Vienna [ENA] There are several thousand billion galaxies in our universe. A galaxy rotates around a black hole, while planets rotate around one or two stars, with a star being a sun. In our solar system there are about 60 billion stars. In the Milky Way, there could be about 50 billion starless planets. Researchers refer to these planets as hikers.Scientists have discovered the next known representative, 100 light-years away.

But how do such exoplanets actually emerge? Arjen van Elteren answers this question by saying that young clusters could play an important role. Most planets are born and planetary systems are born in such clusters. The frequency of such cases was reflected in a simulation. The result was that hardly any planet could develop completely undisturbed. Gravity manipulation was the order of the day, affecting planetary orbits by up to 70 percent. More than 16 percent of the planets were ejected from their system. Our sun could also belong to a double star system.

Assuming that only one-third of all planets have a main star, there could be a quarter as many unbound planets as stars in the Milky Way. Given the roughly 200 billion stars in our Milky Way, that would be about 50 billion loner planets in our galaxy. CFBDSIR2149 has four to seven times the mass of Jupiter and could originate from the AB Doradus star cluster. Don´t panic.

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