First is the Blue Snowball , a planetary nebula.

In summary, the Blue Snowball is a planetary nebula, the Crab Nebula is a good first attempt, and Saturn was not good to photograph.
  • #1
russ_watters
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First is the "Blue Snowball", a planetary nebula.

I took three pictures tonight.

First is the "Blue Snowball", a planetary nebula. This one is really bright and 30 second exposures are all that is really needed. The only stretching that was done was to cut off the black level at the bottom.

Next is the Crab Nebula. Decent for my first attempt, with 30 and 45 second sub-exposures. There is a ton of subtle detail to bring out with much longer exposures.

Last is Saturn. I've taken a bunch, and frankly, I've been a little disappointed so far. I'm matching, but have not yet exceeded the quality I got from my older, much smaller telescope. I think it is mostly due to the atmospheric turbulence around here.

I've gotten the hardware I need to start autoguiding, so I should be able to start figuring that out soon (tomorrow...?) and up the quality of my another step.
 

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  • #2
russ_watters said:
I've gotten the hardware I need to start autoguiding, so I should be able to start figuring that out soon (tomorrow...?) and up the quality of my another step.
Well, it took an extra month, but here's my first autoguided pic. It's 15x2 minute red subs 15x3 minute blue and about 30x3 minute green subs. I intended to go to bed while shooting luminance frames, but fell asleep on the couch while it was shooting the greens.

I've got a very dirty CCD, which is surprising since I keep the camera in a zip-lock bag when not using it, but I cleaned it tonight and it looks better. Regardless, I've uncovered a bunch of learning curve issues to deal with. Still, it's a pretty good result. Compare it to my image in post 125: https://www.physicsforums.com/attachment.php?attachmentid=7011&d=1148840740
 

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  • #3
I finally got a good night of seeing for imaging Saturn. Attached is the result - by far my best yet.

I'd actually been starting to wonder if I was doing something wrong or if there was something wrong with my scope, but nope - it looks like it is all about the seeing where I live. I did take more exposures than usual (1000 vs about 3000) and I did the color correction in Registax and I think it looks more natural than in some of my others.

This is about 500 of 1000, stacked in Registax 4, single point alignment (can't seem to get multipoint to work...), .25sec exposures, 5x powermate, bmp format, taken with my DSI-Color.

I'm not finished processing yet, but this is probably 95% of what I'll get out of it (at 3:00 in the morning...). I also took a few avis with my QuickCam VC, so we'll see if they yield anything...

Btw, I have finally updated my website...
 

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  • #4
Very nice, Russ!
 

1. What is a planetary nebula?

A planetary nebula is a type of emission nebula that is formed when a low-mass star reaches the end of its life and sheds its outer layers. The remaining core of the star heats up and ionizes the surrounding gas, creating a glowing cloud of gas and dust.

2. How is the Blue Snowball nebula formed?

The Blue Snowball nebula, also known as NGC 7662, is formed when a low-mass star around 1-3 times the mass of the Sun reaches the end of its life and sheds its outer layers. The remaining core is then exposed and emits intense ultraviolet radiation, causing the surrounding gas to glow.

3. Why is the Blue Snowball nebula blue in color?

The Blue Snowball nebula appears blue due to the presence of ionized oxygen atoms in its gas cloud. These atoms emit blue light when they are energized by the radiation from the exposed core of the dying star.

4. How big is the Blue Snowball nebula?

The Blue Snowball nebula has a diameter of approximately 2 light years, which is relatively small compared to other planetary nebulae. However, it is still expanding and may continue to grow in size over time.

5. Can the Blue Snowball nebula be seen from Earth?

Yes, the Blue Snowball nebula is visible from Earth with a telescope. It is located in the constellation of Andromeda and has a magnitude of 8.6, making it relatively easy to spot with the help of a telescope or binoculars.

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