The spiral galaxy [ http://www.astro.ru…] M33 [ http://ftp.seds.org…] is a mid-sized member of our Local Group of galaxies [ http://antwrp.gsfc.…]. M33 is also called the Triangulum Galaxy for the constellation [ http://www.astro.wi…] in which it resides. About four times smaller (in radius) than our Milky Way Galaxy [ http://antwrp.gsfc.…] and the Andromeda Galaxy [ http://antwrp.gsfc.…] (M31), it is much larger than the many of the local dwarf spheroidal galaxies [ http://antwrp.gsfc.…]. M33's proximity to M31 causes it to be thought by some to be a satellite galaxy of this more massive galaxy. M33's proximity to our Milky Way galaxy causes it to appear more than twice the angular size of the full moon [ http://antwrp.gsfc.…], and visible with a good pair of binoculars [ http://jersey.uoreg…]. In the above picture [ http://fondue.gsfc.…], visible light is shown in red and ultraviolet light superposed in blue [ http://antwrp.gsfc.…]. Stars in M33 are the most distant ever to be studied spectroscopically [ http://www.aas.org/…].
Explanation
The spiral galaxy [ http://www.astro.ru…] M33 [ http://ftp.seds.org…] is a mid-sized member of our Local Group of galaxies [ http://antwrp.gsfc.…]. M33 is also called the Triangulum Galaxy for the constellation [ http://www.astro.wi…] in which it resides. About four times smaller (in radius) than our Milky Way Galaxy [ http://antwrp.gsfc.…] and the Andromeda Galaxy [ http://antwrp.gsfc.…] (M31), it is much larger than the many of the local dwarf spheroidal galaxies [ http://antwrp.gsfc.…]. M33's proximity to M31 causes it to be thought by some to be a satellite galaxy of this more massive galaxy. M33's proximity to our Milky Way galaxy causes it to appear more than twice the angular size of the full moon [ http://antwrp.gsfc.…], and visible with a good pair of binoculars [ http://jersey.uoreg…]. In the above picture [ http://fondue.gsfc.…], visible light is shown in red and ultraviolet light superposed in blue [ http://antwrp.gsfc.…]. Stars in M33 are the most distant ever to be studied spectroscopically [ http://www.aas.org/…].
