Scientists discover two massive black holes orbiting each other

[ahlam1399]

http://img-s-msn-com.akamaized.net/tenant/amp/entityid/BBDpO9s.img?h=100&w=100&m=6&q=60&o=f&l=fFor the first time ever, scientists have observed two separate black holes orbiting each other. Josh King has the story (@abridgetoland)

أكثر... (http://www.msn.com/en-ca/video/wonder/scientists-discover-two-massive-black-holes-orbiting-each-other/vi-BBDq2Xn?srcref=rss)