Remember Pioneer 10? Test your knowledge of space probe missions

It is 15 years since Nasa lost contact with mankind's first interstellar probe. What can you remember about it and the missions that followed?

Fifteen years ago today, scientists at Nasa received the final faint signals from Pioneer 10, the first manmade object to leave the solar system. Over the years, her sister ship Pioneer 11 and the two Voyager probes have also embarked on the long journey to be emissaries for the human race among the stars.

How much do you remember about these groundbreaking space missions, the discoveries they made, and the strange objects they had on board?