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Blue Star in Leo
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The faint and hazy patch of light directly northward from Regulus is Leo I, a dwarf spheroidal galaxy some 820,000 light years distant. Leo I is thought to be a satellite galaxy of the Milky Way, and if so this would make it most distant such satellite of the Galaxy known. Imagery provided by Aladin sky atlas
Regulus lies almost exactly on the Ecliptic, the apparent path
of the Sun through the sky. This means that, once each year, the Sun will
appear to pass directly in front of the star, an event which happens on or about the
A comet pursues its lonely course around Regulus, the 'Royal Star' of Leo.
This blue dwarf star is slightly variable, but is always bright from an Earth-bound observer's
perspective, with an apparent magnitude varying around +1.3. Regulus is also notable for lying almost exactly on the line of the Ecliptic.
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