Astronomers spot mysterious 'iron bar' in well-known Ring Nebula - Reuters

1. Astronomers spot mysterious 'iron bar' in well-known Ring Nebula  Reuters
2. Cardiff University team helps find mysterious iron bar in space  BBC
3. What Created This Strange Iron Bar In The Ring Nebula?  Universe Today
4. Astronomers discover an enormous iron bar in the famous Ring Nebula: 'We definitely need to know more'  Space
5. Ring Nebula: What is mysterious iron 'bar' in space?  Sky News

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