Friday, October 19, 2012
The top image is of galay M-51, the "Whirlpool" galaxy, an interaction of two galaxies in the constellation Canes Venatici just southwest of the Big Dipper.
The next image is of M-1, the "Crab Nebula", a supernova event remnant in the constellation Taurus.
Below that is expolding galaxy M-82, a spiral galaxy in the constellation Ursa Major.
Lastly, is galaxy NGC 253, a nearly edge-on spiral galaxy in the constellation Sculptor.
All of these objects are visible with even a modest backyard telescope.