Imaged by Jean-Yves Beninger from Singapore on 19 May 2004
LX200GPS 12" at f10, field derotator, AO7, ST8
Stack of 12 images, 5 minutes each
L Bin 1x1 : 60mn
M104 is a galaxy
is linked with the discovery of the "red shift"
and the mistery of the expanding universe. Investigation of
the radial velocities of the galaxies was begun at Lowel observatory
in 1912, before the true nature of such objects was known.
The Sombrero was found to show a red shift of nearly 1100
km/s. This enormous velocity, exceeding anything known at
the time, made it seem very unlikely that such a "nebula"
could be a local gas cloud in the Milky Way system, and offered
strong support for the "Island Universe" theory.