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Rolando Ligustri took this very detailed image of the Cassiopeia area. It is interesting to see fine nebulae all around. NGC 7789 is the big and faint open cluster located at right side, in the border. In the center, below, there is a red emission nebula, NGC 281, sometimes called the Pacman Nebula.
2015-11-13 13:38:31       
Great blog! Is your theme custom made or did you dowlaond it from somewhere?A theme like yours with a few simple tweeks would really make my blogstand out. Please let me know where you gotyour design. Kudos
2015-10-18 16:23:11       
Be sure to read the fine prints The Scotia Momentum Visa Infinite looks like a great deal! But riaedng the fine lines shows that the 4% is capped at 25000$, the 2$ is capped at 25000$ also, and the 1% is only applied after you have reached the two 25000$ limit! (overflow) So until you reach these limits, all of you other purchases evry month do not accumulate any cash back points.Also be advised the the MBNA smart cash rewards is changing its program as of Dec 1st 2012. The 3% on groceries and gas becomes 2% and is capped at 400$ of spending a month versus 600 before. And the 1% remaining which wasn't capped before is now capped at 1250$ of max spending a month. So the max you can earn a month is now 16.50$! and they only send a cheque when you reach 50$, not such a good deal anymore.Read the fine lines! For all the cards.Cheers.
2012-10-09 06:05:48       
I use a different prsceos to remove the thermal signal from my light frames. I separately subtract a master dark frame. This is a better way to do it.There are a number of problems with using in-camera noise reduction.You're doubling the time required, but it's not really doubling the exposure. The camera is shooting a dark frame internally, and then subtracting it. But it's not gathering light.Here are the considerations:1. You cut down in half the available time for gathering photons. More photons mean more signal. More signal means a better signal-to-noise ratio, and essentially, it means less noise. There is no other way to increase the signal except by gathering more photons through more exposures.2. You actually add noise to an image by subtracting a dark to remove the thermal signal. 3. Subtracting a master dark, made of a large number of sub darks, adds less noise to each light frame in calibration.Jerry
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