Tonight we have quite the glittering galaxy of guests for you. Two authors: Nicholas Booth, co-author of The Search for Life on Mars, and Mark Powers, author of kids' book Space Detectives.

Then we fall into deep space with Mathieu Isidro from the Square Kilometre Array radio telescope, HQ at Jodrell Bank.

Prepare to have your mind, body and soul boggled by SKA statistics: every year, the volume of data stored by the SKA would fill over a million 500GB laptops. Data flowing from the antennas to the on-site signal processor will be transferred 100,000 times faster than the projected global average broadband speed for '2022'. And the SKA will be so sensitive that it could detect an airport radar on a planet tens of light years away. Great news for air traffic control aliens.

Join Vicky Duncalf, along with the all-stars crew in the chat room, Cosmo the Telescope Sloth and hopefully some pretty impressive new Pop Astro bling which Vicky will be modelling if Royal Mail get here in time.

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