The Rosetta space mission's official Twitter page has marked the spacecraft's rendezvous with the comet in an unusual way:
More top news
A police officer has suffered potentially life threatening injuries after being assaulted in Doncaster.
Eight cases of fraud and four possible thefts are being investigated, Scotland Yard said.
The US president is set to call on leaders to rally together in the face of threats from North Korea and Iran at the UN General Assembly.