We’re having a short RWP today as I have a larger post on Dobrzyn to follow soon. Today we have two special star photos from reader Don McCrady
After a streak of great clear weather in the Seattle area I (thus far) have two new astro-images for your site. (More coming, I hope, if I can get some more clear skies and fix some technical issues I’m having.) I’ll send them in separate e-mails to avoid confusion.
First, a nebula that I will dub “The Great Wall of Mexico“, a reference that — I promise — has nothing to do with Donald Trump! This is the “Mexico” portion of the much larger North America Nebula, and the bright ridge along its western “coastline” is known informally as the Great Wall. The entire area is composed predominantly of ionized hydrogen and oxygen, but the inky dark spots and streaks are from the intervening clouds of dust that block the background glow. The combination makes for a wonderfully complex and fascinating area of the sky.
This image was taken with a Stellarvue SVS130 telescope and an SBIG STL-4020M camera, and is a combination of Hydrogen-alpha and Oxygen-III. The colours have been heavily manipulated to my aesthetic tastes, but generally the red areas correspond to Hydrogen and the blue/green areas to Oxygen. The final image was upsampled 1.5x.
Here’s the second astro photo I’ve been working on. This one is the aptly named Bubble Nebula, which really is a bubble in space. The stellar wind of an extremely hot and energetic star at the center is carving out the surrounding molecular cloud of interstellar dust and gas. The Bubble Nebula lies about 11000 light years distant in the constellation of Cassiopeia, and is nearby the beautiful open cluster M52.
This image was taken with a Stellarvue SVS130 telescope and an SBIG STL-4020M CCD camera. Hydrogen-alpha was used as the red channel, while the blue and green channels are Oxygen-III. The image was processed in MaximDL and Photoshop, and was upsampled 2x.