Today’s physics news: Friday, 24 September 2010

Space station undocking delayed
Three crew return to the International Space Station after the Russian spacecraft due to take them home fails to undock.
BBC

Saturn’s aurora captured on film
A spectacular light show seen dancing across the atmosphere of the planet Saturn is helping scientists understand one of nature’s most beautiful and mysterious phenomena on Earth – the northern lights.
Telegraph 
 
Einstein’s theory proved; bad news if you own a penthouse
Scientists use atomic clocks to show that time moves faster at altitude, even on Earth
Independent
Nature