A collection of large supernova remnants in scale, Metsavainio

A collection of large supernova remnants in scale

A collection of large supernova remnants in scale, Metsavainio

A collection of large supernova remnants in scale

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Description

Please, use a link under the image. There are more info and images in my blog.

Since I don't have any equipment to continue my imaging work, I have organized my image archives. This time I made an image collection out of the supernova remnants with a large angular scale. I'm trying to show here, how large they really are in the sky. There is an image of the Moon as a scale in the poster. The Moon has an angular diameter of about 30 arc minutes, that's equal to 0,5 degrees.

All the images are shot with the camera optics, Canon EF 200mm f1.8 monster lens full open, Baader narrowband filters (H-a, O-III and S-II) and the QHY9, a cooled astronomical camera with the KAF 8300 CCD chip. Very long exposure times are used, 15 to 50 hours per image, to reveal dim and diffused structures buried in the dense star fields. There are also two "firs light" images out of two super nova remnants, Sharpless 221(Sh2-221) and G65.3+5.7SNR. I haven't been able to find any other color images out of them, showing the whole SNR.

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    A collection of large supernova remnants in scale, Metsavainio
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A collection of large supernova remnants in scale, Metsavainio