Pleiades, 50mm, No Tracking, Finger Lakes region of New York

Pleiades, 50mm, No Tracking, Finger Lakes region of New York

Now that the Milky Way is settling down for the winter, I decided to move on to other subjects on this very clear night. My last few outings have been increasingly plagued by dew forming on my lens. Actually, my entire camera has been dripping wet most nights. So I went to Walmart yesterday and grabbed a few sets of hand-warmers and taped a pair around my lens. They fit perfectly! No need to wipe every 90 seconds. I shot for hours without any dew at all, while my car made puddles around its perimeter.

Because my nifty-fifty gets nasty real quick on any stars that aren’t near dead-center, I had to re-frame the Pleiades every 5 minutes or less. That makes a pretty big difference. I also shot nearly 600 dew-free frames of Andromeda last night. Here’s that:

www.flickr.com/photos/15304966@N06/36609692994/in/photost…

I used DeepSkyStacker to stack 238 images captured with my Canon 50mm f/1.8 set to f/2.2, 5-seconds, ISO 12800 on a Canon 60D body.

I stretched the output just a bit in Photoshop — only 1-1/2 Levels adjustments — any more brought all the noise back. I was pleased to get this much dust glow without having a background that looked like a rain-soaked end-of-semester sofa sitting at the curb. I tweaked the colors a bit to get some blue back, and then cropped and re-sampled the image 200 percent.

My computer, my drives and my long lens are conspiring to get a cheap tracker for me this Christmas. They’ve had just about enough of these shenanigans.

Posted by Douglas Gray on 2017-09-25 06:19:11

Tagged: , astrophotography , Pleiades , 50mm , astronomy , stars , dust , gas , cluster , hand , warmers , DeepSkyStacker , night

V1247 Orionis, variant

V1247 Orionis, variant

Edited European Southern Observatory image of the star V1247 Orionis, set in a ring of dust and gas. Color/processing variant.

Original caption: This image from the Atacama Large Millimeter/submillimeter Array (ALMA) shows V1247 Orionis, a young, hot star surrounded by a dynamic ring of gas and dust, known as a circumstellar disc. This disc can be seen here in two parts: a clearly defined central ring of matter and a more delicate crescent structure located further out.

The region between the ring and crescent, visible as a dark strip, is thought to be caused by a young planet carving its way through the disc. As the planet orbits around its parent star, its motion creates areas of high pressure on either side of its path, similar to how a ship creates bow waves as it cuts through water. These areas of high pressure could become protective barriers around sites of planet formation; dust particles are trapped within them for millions of years, allowing them the time and space to clump together and grow.

The exquisite resolution of ALMA allows astronomers to study the intricate structure of such a dust trapping vortex for the first time. The image reveals not only the crescent-shaped dust trap at the outer edge of the dark strip, but also regions of excess dust within the ring, possibly indicating a second dust trap that formed inside of the potential planet’s orbit. This confirms the predictions of earlier computer simulations.

Dust trapping is one potential solution to a major stumbling block in current theories of how planets form, which predicts that particles should drift into the central star and be destroyed before they have time to grow to planetesimal sizes (the radial drift problem).

Links
Science paper
Credit:
ALMA (ESO/NAOJ/NRAO)/S. Kraus (University of Exeter, UK)

Posted by sjrankin on 2017-10-17 01:24:55

Tagged: , 17 October 2017 , Edited , ESO , European Southern Observatory , V1247 Orionis , Star , Dust , Gas , Ring

just bought: 01.27.10

just bought: 01.27.10

Compressed air. I needed to do some cleaning.

Posted by Justin.Brown on 2010-01-28 03:40:38

Tagged: , purchase , bought , paid , for , buying , acquiring , january , twenty , seven , seventh , 27th , wednesday , compressed , gas , dust , clean , computer , electronic , tube , spray , can , aerosol

Amazing Circle: Nebula Series

Amazing Circle: Nebula Series

Nebula Series 2/4

Photo Art using "Amazing circles" technique found HERE.

Posted by spitfirelas on 2006-01-24 12:43:29

Tagged: , amazing circle , amazing circles , photoshop manipulation , abstract art , photoshop , abstract , computer generated , circle , nebula , stars , dust , gas , cluster , clouds , interstellar gas , spitfirelas

Amazing Circle: Nebula Series

Amazing Circle: Nebula Series

Nebula Series 1/4

Photo Art using "Amazing circles" technique found HERE.

Posted by spitfirelas on 2006-01-24 12:43:28

Tagged: , amazing circle , amazing circles , photoshop manipulation , abstract art , photoshop , abstract , computer generated , circle , nebula , stars , dust , gas , cluster , clouds , interstellar gas , spitfirelas

Amazing Circle: Nebula Series

Amazing Circle: Nebula Series

Nebula Series 3/4

Photo Art using "Amazing circles" technique found HERE.

Posted by spitfirelas on 2006-01-24 12:43:29

Tagged: , amazing circle , amazing circles , photoshop manipulation , abstract art , photoshop , abstract , computer generated , circle , nebula , stars , dust , gas , cluster , clouds , interstellar gas , spitfirelas

Amazing Circle: Nebula Series

Amazing Circle: Nebula Series

Nebula Series 4/4

Photo Art using "Amazing circles" technique found HERE.

Posted by spitfirelas on 2006-01-24 12:43:29

Tagged: , amazing circle , abstract art , computer generated , circle , nebula , stars , dust , gas , cluster , clouds , interstellar gas , spitfirelas

Stars at the Galactic Center

Stars at the Galactic Center

"You may use NASA imagery, video, audio, and data files used for the rendition of 3-dimensional models for educational or informational purposes, including photo collections, textbooks, public exhibits, computer graphical simulations and Internet Web pages. This general permission extends to personal Web pages."-COPIED FROM NASA.GOV

And this applies to all images shown here from NASA.

I am not doing anything which is illegal. I want to share some of the most beautiful images taken by NASA. I love astronomy and want to share this passion with others.

Thank You.

Posted by Somak Pal on 2009-09-28 15:06:58

Tagged: , space , galaxy , star , reg , gas , dust , beautiful , astronomy , big