DESCRIPTION:
Spherical Spectrum | NCS Release - High Maintenance - Change Your Ways (feat. Charlotte Haining)

High Maintenance
• https://soundcloud.com/highmaintenanc...
• https://www.facebook.com/highmaintena...
• https://www.youtube.com/user/HighMain...
• https://twitter.com/HighM_UK

Charlotte Haining (vocalist)
• https://soundcloud.com/charlottehaining
• http://www.facebook.com/CharlotteHaining
• https://twitter.com/CharlHaining

https://www.youtube.com/watch?v=z3d77MqAeY8

Background picture : The Triangulum Galaxy, M33
http://www.skyfactory.org/m33/M33_KPNO_ddemartin_2.jpg

This image is from Davide de Martin, who takes images from professional observatories, reprocesses them, and puts them on his Sky Factory website. M33 is a bit of an odd beast: it's the second-closest spiral galaxy to our own -- at about 3 million years away, it's just a bit farther away than the Andromeda Galaxy -- but it's fainter than you might expect in the sky. That's because it's dinky, less than half the size of our Milky Way, and face-on, which means that small amount of light gets spread out, dimming it.

This picture is from observations using the 4-meter Mayall telescope at Kitt Peak, a fine instrument indeed. The picture uses mostly "natural" color, adding together blue, green, and red-filtered images.

Also included in that summation is one more image using a filter that only lets though a very specific wavelength of light associated with warm hydrogen. Called Hα, this is given off by gas clouds forming stars, and is shown here as the sharp red color. So wherever you see those blobs of red, stars are forming at a furious rate. And look to the upper left: see that particularly large and bright nebula? That is NGC 604, a monstrous star-forming region that's 1500 light years across or more; it puts our own Orion Nebula to shame. It's one of the largest stellar factories in the Local Group of galaxies; if it were as close as Orion it would be visible in the daytime!

One other thing: the spiral arm to the left and below NGC 604 appears to be sharply defined and almost straight. I'm thinking that's a perspective effect, but the arm itself does appear pretty well-defined in a far-infrared image as well. It's interesting what you find looking at such fine images, and comparing them at different wavelengths.

Phil Plait

Image credit: KPNO, NOAO, AURA, Dr. Philip Massey (Lowell Obs.) - Image processing: Davide De Martin.

Thanks for watching