After a historic but awkward comet landing, the robot probe Philae is now stable and sending pictures - but there are concerns about its battery life.<br><br>After two bounces, the first one about 1km back out into space, the lander settled in the shadow of a cliff, 1km from its target site.<br><br><br><a href="http://www.bbc.com/news/science-environment-30034060">READ MORE ON BBC NEWS | SCIENCE & ENVIRONMENT</a>
