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...
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.
dynamic evidence solar somewhere system
It is more evidence that our solar system is a dynamic place, somewhere very active.
consistent
Everything we find now is consistent with that conclusion.
dynamic rings system youthful
The new discoveries demonstrate that Uranus has a youthful and dynamic system of rings and moons.
clue dynamic expect nobody rings system until youthful
The new discoveries dramatically demonstrate that Uranus has a youthful and dynamic system of rings and moons. Until now nobody had a clue the rings were there, we had no right to expect them.
chaotic disruptive solar systems
Uranus is one of the most chaotic and disruptive systems in the solar system.