Another attempt at a shot of the Moon using 14 images from my HS10 and then stacking them with Registax.

Still unsure whether there is a marked improvement over just one of the originals. Not sure if I need to try and get more images to start with...will try more next time.

Statement: The Earth rotates on its axis 366.25 times per year

That is, when the Earth completes one whole revolution around the Sun (360 degrees), which is a year, it has rotated on its own axis 366.25 times.

This is going to be old news to some people, but I think it will still catch a lot of people out. The obvious thing I am hoping you are wondering here is that you thought there were only 365 days in a year. Some of you will know there are actually 365.25 days in a year, hence the reason for a leap year every 4 years. But where does that extra rotation come from to make it 366.25?

Have a think before reading the solution below. Hopefully the wonders of jQuery will have hidden it from you until you click.

Click here to reveal the solution.

As part of my goal this year to get more knowledgeable on astronomy, I finally got round to trying out Registax to stack some photos I took of the Moon ages with this very thing in mind.

I always wanted to try this out but to date did not have a computer powerful enough to really do it. But that has recently changed as I finally have a decent computer in the form of a Dell XPS 15, which I must say is rather nice! Its an i7 with 4Gb of ram so it will serve purposes such as using Registax perfectly. This is compared to my Samsung N130 netbook, which was my main computer before, with its little 1.6GHz Atom processor.

Anyway, I know with most astrophotography that is built up from stacked images, the source is usually a video feed, which I guess is like having lots of individual photos, but combined in a video. Registax pulls out the individual frames like photos anyway. I had 5 photos that I took on my Fujifilm HS10. I took them as a 'burst' so they were all within about 1 second, so little movement between shots (not that it really matters).