The Leo I (Regulus) Dwarf Galaxy
AAO image reference AAT 51.    « Previous || Next »

The Leo I Dwarf Spheroidal Galaxy, Regulus dwarf, DDO 74, leo1.jpg
Top left is NE. Image width is about 11 arc min
Image and text © 1987-2010, Australian Astronomical Observatory, photograph by David Malin.

The 'Local Group' of galaxies, to which the Milky Way belongs, contains more dwarf galaxies than any other type. The low surface brightness and lack of bright stars makes them difficult to study, even with a large telescope. The dwarf galaxy in Leo (Leo I) presents particular problems because the galaxy appears only 20 arc minutes (less than the apparent diameter of the Moon) from the brilliant star Regulus and special precautions had to be taken to prevent scattered light from the star obliterating its feeble image. The plates from which this picture was made (the first in colour of a dwarf elliptical galaxy) will be used to learn more about the origins of star formation in these light-weight objects.

For details of photographic exposure, search technical table by AAT reference number.

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Updated by David Malin, 2010, August 1