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Дата изменения: Fri May 26 12:14:45 2000
Дата индексирования: Mon Oct 1 19:13:13 2012
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Поисковые слова: active galaxy
<b style="color:black;background-color:#66ffff">Galaxy</b> Gallery Page III

Galaxies are diffuse objects which are imaged against a background of finite brightness and noise. Galaxies which have the maximum contrast with respect to this background are the ones that are first discovered. However, there are many galaxies which have a maximum contrast with respect to the sky background of just a few percent. These galaxies have been missed to date but active surveys for them are underway. At present, it appears that up to 50% of the galaxy population may have been missed to date. In this page we present several examples of these newly discovered Low Surface Brightness galaxies as well as examples of high surface brightness galaxies.

  • This Is M101.

    M101 is a High Surface Brightness Galaxy: It has lots of active star formation and many H II regions. This exposure was through a blue filter with an exposure time of 30 seconds with a 52-inch telescope using 4.85:1 re-imaging optics in front of the CCD

  • This Is Malin 1.

    Malin 1 is an excellent example of a very Low Surface Brightness Spiral Galaxy. This galaxy was only recently discovered and can barely be seen in this 30 minute exposure using a 100-inch telescope in Chile. The galaxy disk covers about half of the image Frame yet is barely visible. There are lots of these out there.

    Click Here for another example of a barely discernible, totally unimpressive galaxy that we have recently discovered as we have started our CCD survey

    Gallery of Low Surface Brightness Objects ___________________________________________________________________

    The Electronic Universe Project
    e-mail: nuts@moo.uoregon.edu