Flash in the sky

Méabh at the telescope just before this year's Stargazing Live started on the BBC .

http://www.bbc.co.uk/programmes/p00mlr20

Of course, when observing the thing to avoid is bright flashes of light down the telescope tube! Ours, incidentally, is a simple 4.5 inch Dobsonian. Nothing fancy, just a thin metal tube with a hole at one and and a mirror at the other.