December 2013: the hidden secrets of M42

If there’s a visited target in the sky, that’s for sure M42.

The bright Orion Nebula is an easy target for any type of equipment and expertise. But this object hides inside its core some secrets which are a challenge to uncover. How can this be?


The intense core of the nebula is so bright that images are overexposed. To avoid this, one must take short exposures subs. But at the same time, short exposures cannot get the detail out of the fainter part of the object.

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December 2013: a comet that defied the Sun… and lost

Comet ISON was an awaited visitor. Although nobody could be sure of its fate when it got close to the Sun, many thought that it could become “the comet of the century” if it survived. As you know, it didn’t.

Before its demise, I took some pictures of it. It was about two weeks before perihelium.

OK, I don’t know much about comet photography and processing. I tried short shots (30 seconds) , to be sure the movement of the coment didin’t show up in the pictures.

I created two pictures: one in color, adding only two frames in each channel (RGB). And one in B&W, stacking several L frames (and getting rid of the background stars while stacking).

ison v6 ison naked