Nieuws

(Vergeten?) Registreren

Zwart gat bij Zwaan op 'amper’ 7800 lichtjaar van Aarde

Geplaatst op 06-12-2009 om 16u01 door Bert Carrein - 3416 keer gelezen
Nieuws

De afstand van de aarde tot een zwart gat in de nabijheid van het sterrenbeeld Zwaan is 'slechts' 7.800 lichtjaar, meldt ruimte-instituut SRON. De afstand is veel kleiner dan deskundigen eerder dachten, staat in The Astrophysical Journal. Een lichtjaar is ongeveer 9,46 biljoen kilometer.

Een internationaal team van sterrenkundigen heeft de radiostraling van het zwarte gat en zijn begeleidende ster, V404 Cygni, gemeten. Hierbij hebben zij gebruikgemaakt van zogenoemde hoekverschuiving van het duo. Deze meetmethode kent een relatief kleine foutmarge, namelijk minder dan zes procent.

Uit de metingen leiden de sterrenkundigen af dat dit zwarte gat is ontstaan uit een supernova-explosie. Het beweegt zich met een snelheid van 40 kilometer per seconde door de ruimte. Onderzoeker Peter de Jong hoopt via dit onderzoek een beter beeld te krijgen van het ontstaan van zwarte gaten.

Bron: http://www.hln.be

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