SUNSET: 
0
Photographer:
Rod Pommier
Location of Photo:
Pommier Observatory, Portland, OR, USA
Date/Time of photo:
2020-04-24 through 2020-05-03
Equipment:
Celestron Compustar C14 with Starizona LF reducer/corrector (f/7.5), SBIG STL 11000M CCD with Baader Planetarium LRGB filters, SBIG AO-L adaptive optics at 8 Hz
Description:
M104 is a lenticular galaxy with a large central bulge lying 31 million light-years from Earth. It is seen nearly edge-on, which brings its dark equatorial dust lane into sharp relief. The combination of the large central bulge and the dark dust lane give it a resemblance to a sombrero hat. Astronomer Vesto Slipher from Lowell Observatory was the first to measure the redshift of M104 and found it was receeding from us a velocity of 1,000 kilometers/second. This was some of the first evidence of the expansion of the universe from the Big Bang. Exposures: L:R:G:B = 75:20:30:35 minutes = 2hours, 35 minutes total exposure at f/7.5.
