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Kepler vindt planetenstelsel met dubbelster

Geplaatst op 29-08-2012 om 09u12 door Bert Carrein - 14893 keer gelezen
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De Amerikaanse ruimtetelescoop Kepler heeft een planetair systeem met twee zonnen gevonden. In systeem Kepler-47 cirkelen minstens twee planeten rond een dubbelster. Eén van hen bevindt zich zelfs in de levensvatbare zone, berichten onderzoekers rondom Jerome Orosz van de San Diego State University in het Amerikaanse vakblad Science.

Leven zou er echter niet zijn. De ontdekking toont wel aan dat zich rondom een dubbelster een planetensysteem zoals het onze kan zijn.

Kepler-47 bevindt zich ongeveer 5.000 lichtjaar van ons in het sterrenbeeld Zwaan. Daar draaien twee sterren in 7,45 dagen rond elkaar: één die op onze Zon gelijkt en één die een derde groter is. Rondom dit sterrenpaar heeft zich een systeem met minstens twee planeten gevormd.

De Kepler verschalkte deze exoplaneten omdat zij vanuit de Aarde gezien geregeld voorbij hun dubbelsterren schoven en die lichtjes verduisterden.

astronomie sterrenkunde ruimtevaart nieuwsastronomie sterrenkunde ruimtevaart nieuws

Bron: HLN

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