... solar system; the cratered Callisto, the most distant moon; the giant Ganymede, the ... Having made optical solar observations with many solar telescopes and in the rockets ...
... stars, and it was recently used to make the first direct measurement of the radius of a planet outside the solar system ... of Williams' research include the early detection of declines in R Corona Borealis-type stars and the long-term monitoring of ...
... Vol. CS 277 . STELLAR CORONAE IN THE CHANDRA AND XMM-NEWTON ERA . ... Vol. CS-272 . THE FUTURE OF SOLAR SYSTEM EXPLORATION (2003-2013) ? ... Community Contributions to the NRC Solar System Exploration Decadal Survey . ...