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Astronomy

Photos I've taken of the years of the Night Sky. Lots of different circumstances.

       
    
    
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Triangulum Pinwheel Galaxy (M33)

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Eric Briggs

This image may look pretty good, but I think it's more evidence of how much I still have to learn.

Setup: ST-237A on 8" SCT at F/2
Average-combined LRGB 25-second exposures

Ways to improve the image:
Improved flat frames (this image is not flat-framed because the flats I took were unsatisfactory, as a result vignetting is a problem)

Bias frames (none were taken)

Binning the RGB images (unbinned, the stars have little bursts of colour around the edges... binned 2x2, colour will be greater in sensitivity but not oversampled so no colour-farts, and also won't take as long to expose and download)

Guided images (My autoguider setup is not quite ready for use. When it's ready I will be able to keep images better framed)

Computer control (with the telescope slaved to Starry Night or TheSky setting up a montage or mosaic will be much easier, and so I can present a wider-field finished image.)

Longer exposures (a corollary of autoguiding)

Different focal lengths (The chip of the ST-237A is only 640 x 480, and what you see on your screen is the best resolution before things start to get blocky. Using my .63x Reducer I could take images closer up to get details on, for example, the pink bit at upper right. That's a giant starbirth region, NGC 604, in this exterior galaxy which dwarfs the Orion Nebula 100 to 1. And then use Registar to sink the detailed image into this wide shot.)

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