He showed that even the largest gas giant, Jupiter, had only a slightly better hold than the Sun on its outer captured satellites, some with tug-of-war values not much higher than one.

Subsequent collisions between these captured satellites may have created the suspected collisional families seen today.

Others may be captured satellites, hulks, objects in orbit.

In certain missions, the virtual Astronauts will also drive the Manned Maneuvering Unit to capture satellites for maintenance.

For us the top story this week has been the three dimensional images captured by NASA's Solar TErrestrial RElations Observatory (STEREO) satellites giving us a full 360 view of the Sun.