Image of the day

Captured by
Douglas Rollain

M20 Trifid Nebula in LRGBHa

About Astromart

My Account

New to Astromart?

Register an account...

Need Help?

Posts Made By: dan kowall

August 20, 2007 08:01 PM Forum: N.A.S.A.

I.S.S. in High Def

Posted By dan kowall
The Discovery channel had a first-time, live broadcast in high definition from the space station yesterday.
I know it's trite to say "it was like you were there", but, it was.
I'd highly recommend the experience should they rebroadcast it or do it again.

dan kowall

September 22, 2007 07:03 PM Forum: CCD Imaging and Processing/Deep Sky

The Pleiades

Posted By dan kowall
The skies finally cleared a bit so I went after what has always been a technically difficult target for me, M 45.
If you want to include the surrounding dust, it makes for a huge dynamic range with the bright stars.
I was fortunate to capture an asteroid during one night's exposures.
Image details and larger images are here:
http://www.photonhunter.com/clusters/M45.html

Thanks for looking,

dan

February 10, 2008 06:07 PM Forum: CCD Imaging and Processing/Deep Sky

A Late Andromeda

Posted By dan kowall
It's taken me a while to get around to processing this. I kept thinking the weather would clear so I could get more exposure time in on it. Silly me.
Here, then, is last year's take on M 31.
Larger images and details are here:
http://www.photonhunter.com/galaxies/M31,AP130.html

dan

March 3, 2008 10:29 PM Forum: CCD Imaging and Processing/Deep Sky

A Late Holmes

Posted By dan kowall
Slightly off topic, but I thought that you guys might be interested:
http://www.photonhunter.com/solarsystem/Holmes.html

dan

March 3, 2008 10:32 PM Forum: Comets

A Late Holmes

Posted By dan kowall
Better late than never.
Large images, details, etc. at:
http://www.photonhunter.com/solarsystem/Holmes.html

Thanks for looking,

dan kowall

December 9, 2009 10:24 PM Forum: CCD Imaging and Processing/Deep Sky

Leaving Andromeda

Posted By dan kowall
At this year's AIC some of you may have seen me sitting at the back of the room during the various workshops and presentations. "He's probably hoping to catch some zzz's" you may have thought, but I was paying attention.
Well, truth be told, there was one presentation where I started nodding off, but I was continually awakened by the audience chanting "BEFORE!" and "AFTER!" along with Dr. Tom "Say it with me now" Davis.
I was, however, awake and enthralled by the workshop of the PhotoShop guys, Aravind Krishnaswamy and Alan Erickson, who showed a technique for making three dimensional animations of astronomical images.
Until I can reconfigure my computer to better make these videos, I'd like to share a short (5 Mb) 'proof of concept' movie with you. I believe it is best viewed with FireFox or Explorer.
http://www.photonhunter.com/M31,Movie.html
My apologies for any cross posts.

dan kowall

December 28, 2009 04:57 PM Forum: CCD Imaging and Processing/Solar System

Viking Eyes Mars

Posted By dan kowall
Thanks to the software available to amateurs now, animations are easier to make than ever before.
Here's a short animation that I made using data from the Viking mission:
http://www.photonhunter.com/movies/MarsMV.html
It's 5.7 MB, so allow an appropriate length of time for it to load.
Thanks for looking,

dan

March 29, 2010 02:37 PM Forum: CCD Imaging and Processing/Deep Sky

V838

Posted By dan kowall
To quote Rocky the Flying Squirrel:
"And now for something completely different."
I have lately been entertaining a fascination with making movies of astronomical subjects. I was able to get a Really Big Star for my latest movie:
http://www.photonhunter.com/movies/V838MV.html
It's 5 MB, so give it time to load.

dan kowall
photonhunter.com

July 30, 2010 03:00 PM Forum: CCD Imaging and Processing/Deep Sky

Sharpless 2-188

Posted By dan kowall
There was no rush to judgment in the processing of this image. It's been sitting half-finished on my desktop since 2007.
The nebula, itself, is in a rush. If you remember the recent images of Mira streaking through the interstellar medium (ISM) with a churning tail of material in its wake, then you'll not be surprised by the appearance of this fast-moving planetary nebula (PN) as it collides with the ISM.
It is said to be the largest PN that exhibits this kind of behavior.
You can take your time looking at this image, I obviously took my time making it.
Details and larger images here:
http://www.photonhunter.com/nebulae/Sh2-188.html




dan kowall

April 16, 2003 03:08 PM Forum: Home Observatories

Observatory construction underway

Posted By dan kowall
Brian,
On the end of the roof toward which the roof rolls, simply overlap the roof siding onto the wall siding. This will be an effective rain barrier and also act as a stop for the roof when closing it. The other end is more problematic but here are some suggestions: 1) If the roof is small enough, have the casters drop into grooves at the closed position so that the roof sits down onto some weatherstripping 2) A slight overhang of the gable end with a soffit that is flush with the top of your endwall 3) There is an automatic flip up weatherstripping that is used for entrance door bottoms that can be used here. Just about any hardware store has them 4) An overhanging gable end with strip weatherstripping on the inside edge that butts against weatherstripping on the wall top on the outside edge. I hope this helps you.
dan kowall

Funding Member

Sponsors


View all sponsors

Search