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Mercury - Spring 2019

As is usual sometime in Spring, Mercury is well placed in the evening sky - for a little while. It is probably best seen in the afternoon while it is still high in the sky, but that requires an aligned 'goto' or some other means to find it. During the past week the sun has lit up very thin, high clouds making it impossible to see let alone image. A change of wind direction seems ...
Read more : Mercury - Spring 2019 | Views : 271 | Replies : 4 | Forum : Your astro observations, images & sketches


Seven Sisters Ride Again

OK, yawn for some of the longest-serving victims of my posts but here's M45 again, this time without a comet:

https://www.flickr.com/photos/philippug ... ed-public/
Read more : Seven Sisters Ride Again | Views : 167 | Replies : 1 | Forum : Your astro observations, images & sketches


File Types

What's best?

AVIs or SERs for video files?

FITs, TIFs or PNGs for single images?

I had not heard of SERs or FITs before I bought my Altair GPCAM290. My understanding is that with short exposures, videos are better and with long exposures single images are better. And then the file choice is down to whatever software is being used. DSS will stack TIFs and FITs but Registax will only stack FITs.

What else should ...
Read more : File Types | Views : 355 | Replies : 2 | Forum : General


DSS Only One Frame

We've had some good clear skies over the last couple of nights in Kent. (I saw Mercury setting tonight (always a bit of a treat! (It will be at it's greatest eastern elongation in a few days.))) The new heated dew shield is working nicely. Visually the CGX is performing well now I can do a half decent polar alignment. I got some (poor!) images of M42 Thursday night after finally working out how to ...
Read more : DSS Only One Frame | Views : 169 | Replies : 2 | Forum : General


Lens choice

I have a Canon EOS 200D and I would like an 'old fashioned' style wide angle lens where I can manually focus to infinity.
I have manual focus on my current lens but it is a continuously rotating ring that sends an electronic signal to the camera.
I want a definite 'end stop' type of focus if this makes any sense.
Are there any suitable lenses preferably around 10 to 18mm?
Read more : Lens choice | Views : 166 | Replies : 1 | Forum : Astro imaging


Expansion or Acceleration

From the last Sky at Night programme....

I am not a scientist but thought this should be considered - this is not a debate for me, just some ideas ' out of the box'.

1. Should we be treating the Hubble constant as a constant at all? By assuming the universe were to be accelerating in its rate of expansion would explain potentially the difference in the measured results using the different methods. In other ...
Read more : Expansion or Acceleration | Views : 262 | Replies : 2 | Forum : General


Stargazing with the National Trust!!!

The other night I went to a star party hosted by the National Trust at Tyntesfield near Bristol and capably oganised by Bristol Astronomical Society.
Read more : Stargazing with the National Trust!!! | Views : 190 | Replies : 1 | Forum : General


Jewel in the Dog's collar.

This is an image of Messier 41 in Canis Major. It is a large cluster of stars, slightly bigger than a moon's width across with lots of interesting outlying stars. This is why I used the guidescope. There are just 10 x 15sec exposures. In the telescope some of the brighter stars have an orange hue. The cluster through the telescope looks to me bit like an 'asterix' (*). Neither of these really come through ...
Read more : Jewel in the Dog's collar. | Views : 350 | Replies : 2 | Forum : Your astro observations, images & sketches


Looking for an observation site

Hi,

I am quite new to astronomy I have done some observing from my back garden but most of the sky is blocked out the house and as the local council has put in new lights LED bright ones too it is getting very difficult to see anything.

So I am looking for a site away from the house. What is the best way of finding a site and does any one know any good ...
Read more : Looking for an observation site | Views : 447 | Replies : 2 | Forum : General


Dark sky observing session

We took the advantage of a clear night, no moon and a non work day following to travel about 80 minutes into North Wales to do some observing last night.

We'd been recommended the car park above the Alwen Reservoir dam as a good observing spot, but it's off the main road and the last slope down to it was a bit too covered with snow and ice to risk getting caught at the bottom. ...
Read more : Dark sky observing session | Views : 430 | Replies : 5 | Forum : Your astro observations, images & sketches


 

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