ESA's Rosetta Spacecraft Comet Landing: Probe 'Is on the Surface and Talking'
The Rosetta mission has been hailed as one of the greatest achievements in science ESA

As the world celebrates the Rosetta mission, Twitter users have taken the opportunity to make light of one of the greatest achievements in the history of science.

The #WeCanLandOnACometButWeCant hashtag was launched after the European Space Agency this week successfully landed a spacecraft on comet 67P/ Churyumov-Gerasimenko.

The world-first mission has taken ten years and a four billion-mile journey, in order to study the comet's chemical composition and find out how the Solar System formed 4.5 billion years ago.

Scientists have revealed the Philae robot probe may have "bounced" on the surface of the comet after failing to attach itself as planned, as the probe's two harpoons had not fired to secure the craft.

Stephan Ulamec, project manager of the lander mission, said scientists would next hear from Philae mid-Thursday, when it comes back into radio range.

Yet it has now been confirmed that the probe is secure and stable. ESA scientists are currently debating the next steps in the mission.

In the meantime, IBTimes UK looks at some of the best tweets spawned by the historic achievement: