Facts about the Canis Major Dwarf Galaxy
Type: Irr (Irregular Galaxy)
Constellation: Canis Major
Distance: 25,000 light-years from the Sun, 42,000 ly from the center of the Milky Way
Apparent dimensions: 12° x 12°
Right ascension: 07 hours, 12 minutes and 35.0 seconds
Declination: -27 degrees
History: The Canis Major Dwarf Galaxy was discovered by a team of British, Australian, French, Italian astronomers in November 2003. Using the Two-Micron All Sky Survey (2MASS) technique, the International team of scientists was easily able to detect class M giant stars and galaxies in constellation Canis Major.
Initiated in the late 1990s, the 2MASS survey technique uses automated telescopes that scan the entire sky using infrared wavelengths. Because gas and dust cannot block infrared, it becomes easier for astronomers to detect galaxies hidden in dense concentration of stars, dust and gases.