World Space Week kicks off on October 4, and this year's "Rocket Revolution" theme is about more countries and companies gaining access to space.

Europe is developing its own launch capability, while its joint SMILE mission with China shows cooperation remains possible even as nations compete in space.

But cheaper launches raise questions about who controls access to orbit and who benefits from the investment.

Is the rocket revolution opening space to more of the world, or giving the countries and companies with the deepest pockets an even bigger advantage?

Joining Juliet Mann this week: Colin Forsyth, Associate Professor in Space Plasma Physics at University College London's Mullard Space Science Laboratory, Simonetta Di Pippo, former Director of the United Nations Office for Outer Space Affairs, and Quentin Parker, Emeritus Professor at the University of Hong Kong.