Briefing for helpers (including a passing astronaut) at children space day

This 4-year-old told me light takes 8 minutes to travel from the Sun to the Earth! #scientistonthesofa

Jennifer from the Royal Observatory, Edinburgh, completes her origami Rosetta spacecraft

Jennifer from ROE with her home-made comet. And me and sf writer Ken McCleod with a model of 67/P Churyumov-Girasimenko

Ace performer Jennifer makes a comet from water, sand, charcoal, Worcester sauce (!) and dry ice at -80 Celsius!

Only a very sad author would photograph his own book in a bookshop window!

A friend I made in Edinburgh

Meteorite expert Monica Grady told me her claim to fame is she road-tested the prototype hula hoops!

No children yet at #scientistonthesofa event. Think I’ll just hug this inflatable space shuttle

Rosetta event: with Comedian Helen Keen, exoplanet expert Hugh Jones, Meteorite maestro Monica Grady, sf novelist Ken MacLeod – and me!