One of the Sun's closest neighbours in space, Ross 154 is nonetheless a small and extremely faint reddwarfstar, invisible to the naked eye. In common with many stars of this kind, Ross 154 is a flare star, erupting into activity and brightening considerably over a cycle of approximately two days.
In the depths of the SagittarianMilky Way, near the star-shape known as the Milk Dipper, lurks the reddwarf designated Ross 154. It is much too faint to be detectable by the naked eye, but is significant because it lies less than ten light years from Earth.
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