Evidence for dust accumulation just outside the orbit of Venus Options

[Paolo]

New science from old data (Helios 2 in this case)
http://arxiv.org/abs/0708.0912

[Paolo]

This is the abstract

Evidence for dust accumulation just outside the orbit of Venus
Authors: Ch. Leinert, B. Moster
Abstract: To contribute to the knowledge of dynamics of interplanetary dust we are searching for structures in the spatial distribution of interplanetary dust near the orbit of Venus. To this end we study the radial gradient of zodiacal light brightness, as observed by the zodiacal light photometer on board the Helios space probes on several orbits from 1975 to 1979. The cleanest data result from Helios B (= Helios 2) launched in January 1976. With respect to the general increase of zodiacal light brightness towards the Sun, the data show an excess brightness of a few percent for positions of the Helios space probe just outside the orbit of Venus. We consider this as evidence for a dust ring associated with the orbit of Venus, somewhat similar to that found earlier along the Earth's orbit.


And you can try one of the many mirrors of arxiv. I use the Italian one: http://it.arxiv.org/abs/0708.0912