Links 22/03/13

Voyager* 1 has become the first man-made object to exit the heliosphere and reach interstellar space. Oh, wait, it hasn't quite left yet. xkcd keeps count. But since it was launched in 1977 it has certainly travelled a long way: it's currently more than 18.5 billion kilometres from the sun, 124 astronomical units, or just 17 light hours or 0.002 light years. Space is big.

'We’ve seen an underwater wonderland – an incredible sculpture garden of twisted F-1 engines that tells the story of a fiery and violent end, one that serves testament to the Apollo program.' 

'Today's asteroids might once have been "more like cowpats".'

Discovery of microbes living in basalt rock 500 metres beneath the sea bed of Washington state may mean that the oceanic crust contains 'the first major ecosystem on Earth to run on chemical energy rather than sunlight.'

*For some reason - the end of a long working day; I'm an idiot - I originally typed Viking 1. Viking's lander is still on Mars, and its orbiter is still circling the red planet (although since it can no longer adjust its orbit, it will crash onto the surface in 2019).