7. Pioneering the Heliosphere (1983)

Two rocket probes, Pioneers 10 and 11, are on their way out of the solar system. They are sending back new information about the heliosphere, that part of space in which the influence of the sun is dominant. Patrick Moore and Iain Nicolson talk about the outer heliosphere, and also the search for a possible planet moving beyond the paths of Neptune and Pluto.

Release date: 1983-07-03