"An unmanned Russian probe was planned to visit the Mars moon of Phobos, take soil samples and bring them back. But it became stuck in Earth orbit."
The Hindu : Opinion / Op-Ed : Russia blames radiation for space probe failure: "Russia's space agency said that cosmic radiation was the most likely cause of the failure of a Mars moon probe that crashed to Earth this month, and suggested that a low-quality imported component may have been vulnerable to the radiation."
The Hindu : Opinion / Op-Ed : Russia blames radiation for space probe failure: "Russia's space agency said that cosmic radiation was the most likely cause of the failure of a Mars moon probe that crashed to Earth this month, and suggested that a low-quality imported component may have been vulnerable to the radiation."