Triangulum Galaxy
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The Triangulum Galaxy is a spiral galaxy 2.878 million light-years from Earth in the constellation Triangulum. It is catalogued as Messier 33 or NGC 598. With the D25 isophotal diameter of 18.74 kilop
Galaxy Messier 33 in Triangulum (the Triangulum Galaxy)
NGC 604 in the Triangulum Galaxy
Composite of about 54 different pointings with Hubble's Advanced Camera for Surveys
Infrared image of M33 taken with the Spitzer Space Telescope
Bortle scale
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The Bortle dark-sky scale is a nine-level numeric scale that measures the night sky's brightness of a particular location. It characterizes the observability of celestial objects, taking into account
Triangulum Galaxy
…vision by observers in locations beyond the suburbs in shallow rural areas under good viewing conditions. It is one of the reference objects of the Bortle Dark-Sky Scale. Crumey has shown that although the total apparent V-magnitude of M33 is 5.72, it has an effective visual magnitude of approximately 6.6, meaning that…
Representation of the Bortle scale