Space companies hope to launch regular commercial flights over next 30 years . Virgin Galactic plans to double number of people who have been into space since 1961 . The JUICE mission ( JUpiter ICy moons Explorer ) aims to explore not only the gas giant but also its three moons Ganymede , Callisto and Europa . Comment: Delegates at UK conference also heard about plan to send new probe to Jovian system .
Space companies hope to launch regular commercial flights over next 30 years . Virgin Galactic plans to double number of people who have been into space since 1961 . Comment: Delegates at UK conference also heard about plan to send new probe to Jovian system .