--- Canopus56 <canopus56@yahoo.com> wrote:
Although not visible in amateur visual wavelengths, the Chandra X-ray image of NGC2841 shows how supernovas generate hot gas chimneys and gas plumes that rise out of a galaxy's plane. The clouds then cool, condense and lose their momentum - and sometimes are drawn back down as high-velocity clouds. These high-velocity clouds then crash into the pre-existing molecular clouds in the galactic plane and initiate a new round of star creation.
You should google up a high resolution image of NGC 253. It bubbles like a pizza fresh from the oven. Doing some research for this I ran across astrophotos for NGC 253 going back all the say to 1991. It's amazing what can be done with cameras avalible to amateurs today compared to professional photos from just a few years ago. I can't put up my most recent copy because I took it from the a discussion group and I don't know who deserves the credit for it. It might be Bob Gendler on the SBIG group. APOD has a some nice ones that chart the recent advances in photography. DT __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com