4 BILLION years, 4 Billion miles. Human achievement. Science.

It is mind-blowing. The journey started 10 years ago with the launch of the ESAs 'Rosetta' mission to land a probe on the surface of a comet. A comet that is more than 4 billion years old, known to us as Comet 67P. There has been 25 years of research and planning. Yesterday, 4 BILLION miles (over 6 billion km) later, the probe, named Philae, completed its journey. Landing a probe, the size of a washing machine, on a comet that is travelling at more than 40,000 miles per hour over such unimaginable distances is nothing short of astonishing. A peak in human achievement, a wonderful example of what human beings are capable of when they push the boundaries of science and modern technology. The cutting edge of our understanding of space, the solar system and the universe.