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Astronomy GCSE coursework problem!

Hello

I'm about to start planning my Astronomy coursework - the exam board is edexcel and I'm taking it as a GCSE alongside my A-levels. I'm writing up the plan for my coursework next week.

I have to take a long-exposure photograph of circumpolar stars and use the trace to calculate the length of the sidereal day. The only problem is, i can't get my hands on a camera with long enough exposure.

I thought to overcome this, I'd take lots of photographs at regular intervals within a set time period and find a programme to blend them on my laptop so I can still get the visible trace of the star's 'path' across the sky.

Can anyone recommend me a good website or some free, downloadable software that I can use??

Thanks :colondollar:

Reply 1

Stonebridge

This is normally done with a camera on a "B" setting that keeps the aperture open permanently until you release it.
Most of the old film cameras had this setting.