Now Patricia Henning, a radio astronomer at the University of New Mexico in Albuquerque, says a
survey of the southern
skies has finally uncovered a leading arm of gas as well, which
suggests gravitational tides are at work.
A recent analysis based on a
sky mapping project called the Outer Solar System Origins
Survey, which discovered more than 800 new «trans - Neptunian objects,»
suggests that the evidence also could be consistent with a random distribution of such objects.