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Category Archives: Astronomy
Measuring Naked Eye Limiting Magnitude
I recently came across this posting on measuring Naked Eye Limiting Magnitude and decided to give it a try for my home. We live very close to Exmoor National Park which is now designated a Dark Sky site, so I … Continue reading
Posted in Astronomy
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Why Can’t We See The Flag On The Moon?
I answered this question for someone the other day, whose work colleagues wanted to know if he could see the flag left behind on the moon from the first lunar landing using his new 300mm telescope and thought I’d write … Continue reading
Posted in Astro Equipment, Astronomy
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Registax 6 Tutorial
I use Registax for stacking video frames for planetary imaging, but the learning curve is steep and many online tutorials are out of date because the UI seems to change quite significantly between releases. I was pleased therefore when someone … Continue reading
Posted in Astroimaging, Astronomy
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Jupiter, Venus and Mercury
A poor quality photo, I know, but I was grabbing a few seconds when I should have been doing something else so had to make the best of it. Jupiter is at the top, separated from Venus by what appears … Continue reading
127 Mak Star Test
There were patches of blue sky this evening, but plenty of thin cloud too, Jupiter and Venus were visible before sunset though, so I decided to get the Mak outside cooling and hope we’d have enough clear sky to do … Continue reading
EQ3-2 DEC Drive Gearbox Stripdown
With a new DEC motor drive in place, I decided I’d take apart my old DEC drive gearbox to see if it could be improved at all. Once split from the motor I used two pairs of pliers to hold … Continue reading
EQ3-2 DEC Motor Strip-Down
Having done a fair bit of work trying to improve the motor drive for my EQ3-2 mount I wanted to look particularly at the DEC motor to see if I could improve its performance at all. It’s had a tough … Continue reading
127 Mak Collimation
I’ve been doing a fair bit of fiddling around with my 127 Mak recently. The initial reason for this was that the mirror had become loose on the carrier mechanism, meaning lots of trouble getting reliable focus. To fix this … Continue reading
Observation Report, 18 Feb 2012
My plan for this evening was to spend a bit of time collimating the 127 Mak having had it in pieces a week or so back and then attempt some imaging of Mars, but strong winds made that completely impossible. … Continue reading
EQ3-2 Polar Scope Illuminator
I’ve read a few posting by people who have made polar scope illuminators for their EQ5 mounts and as I find aligning my EQ3-2 very awkward thanks to the lack of illumination of the reticle I decided to attempt to … Continue reading