Dr Becky Smethurst is an astrophysicist at the University of Oxford and star of the astronomy-themed YouTube channel, 'Dr Becky', which has 394,000 subscribers and 24 million total views.
Her co-host on the Supermassive Podcast, Izzie Clarke, has a Masters degree in Physics and is an experienced science journalist and podcast producer.
Richard Hollingham is an award-winning space journalist and broadcaster, writer for BBC Future and commentator for the European Space Agency.
Dr Robert Massey is deputy executive director of the Royal Astronomy Society.
And BBC radio presenter, producer and podcaster, Sue Nelson, is the award-winning author of Wally Funk's Race for Space.