Nasa, the American space agency, has come a long way since the Eagle landed in July 1969. It has given us feats of breathtaking bravery; the most remarkable rescue in history, when the crew of Apollo 13 was returned safely to Earth; jaw-dropping insights into every major object in the solar system; and even the first interstellar mission. Two nuclear-powered Voyager probes, launched in 1977, remain on course to reach distances well over 10 billion miles from the Sun within the coming decade.
This week, there has been much agonising over the future of Nasa, prompted by the final flight of the Space Shuttle programme. The mission marks the end of three decades in which the Shuttle never managed to rekindle the excitement of the great Apollo adventure – or, as promised, to make spaceflight cheap and routine. It also saw two catastrophes – the losses of Columbia and Challenger, along with 14 astronauts – that shattered public confidence in Nasa.
Many today believe that the agency has lost its way. It has cancelled its Ares launcher programme – which would have provided the boost to take humans back to the Moon, and on to Mars – and is about to convert its Shuttles into museum pieces without a clear idea of what comes next. After this mission, America will be dependent on its former rival, using Russia's Soyuz and Progress vehicles to supply the International Space Station. Neil Armstrong, along with other astronauts, has expressed his alarm that Nasa has ignored a golden rule of space exploration: always have a back-up plan.
Nasa's budget has fallen victim to wrangling between Congress and the Obama administration. The House just released its appropriations Bill, which gives Nasa funding of $16.8 billion, $1.6 billion below last year's level and $1.9 billion below the president's request. It has also axed the James Webb Space Telescope, Hubble's successor, to the consternation of scientists.
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