Mark Showalter
Mark Showalter
Mark Robert Showalteris a Senior Research Scientist at the SETI Institute. He is the discoverer of six moons and three planetary rings. He is the Principal Investigator of NASA's Planetary Data System Rings Node, a co-investigator on the Cassini–Huygens mission to Saturn, and works closely with the New Horizons mission to Pluto...
dynamic evidence solar somewhere system
It is more evidence that our solar system is a dynamic place, somewhere very active.
decade dust lasts ring sort unless year
That's sort of mysterious. A dust ring lasts a year or two, or a decade at most unless it's continuously replenished.
chaotic disruptive solar systems
Uranus is one of the most chaotic and disruptive systems in the solar system.