A closely packed system of low-mass, low-density planets transiting Kepler-11.

When an extrasolar planet passes in front of (transits) its star, its radius can be measured from the decrease in starlight and its orbital period from the time between transits. Multiple planets transiting the same star reveal much more: period ratios determine stability and dynamics, mutual gravitational interactions reflect planet masses and orbital shapes, and the fraction of transiting planets observed as multiples has implications for the planarity of planetary systems. But few stars have more than one known transiting planet, and none has more than three. Here we report Kepler spacecraft observations of a single Sun-like star, which we call Kepler-11, that reveal six transiting planets, five with orbital periods between 10 and 47 days and a sixth planet with a longer period. The five inner planets are among the smallest for which mass and size have both been measured, and these measurements imply substantial envelopes of light gases. The degree of coplanarity and proximity of the planetary orbits imply energy dissipation near the end of planet formation.

"I will never forget": what we learned from medical student reflections on a palliative care experience.

PURPOSE: To use reflective writing to evaluate a new required palliative care experience for third year medical students. METHOD: The authors used a constant comparison method based on grounded theory to conduct a thematic analysis of reflective writings produced by third-year medical students completing a mandatory week-long clinical rotation in palliative care during academic year 2010 at the University of Louisville. RESULTS: Two broad thematic categories were identified: what the students learned and what the students experienced. Student writings revealed learning about palliative care (pain management, family meetings, goals of care, patient-family centered care, timing of palliative care, and delivering bad news); being a doctor (knowledge, communication, presence, empathy, not giving false hope, and person-focused care); the patient (importance of family, the experience of dying, and the uniqueness of each patient); and themselves (need to be non-judgmental, ability to do palliative care, self-limitations, becoming a better physician, and dealing with death). Student reflections centered on encounters with patients and families, internal emotional responses, and self-transformation. CONCLUSIONS: Systematic analysis of reflective writing provides educators with valuable data about students' learning experiences. These results may inform the design and modification of the curriculum.

Kepler-9: a system of multiple planets transiting a Sun-like star, confirmed by timing variations.

The Kepler spacecraft is monitoring more than 150,000 stars for evidence of planets transiting those stars. We report the detection of two Saturn-size planets that transit the same Sun-like star, based on 7 months of Kepler observations. Their 19.2- and 38.9-day periods are presently increasing and decreasing at respective average rates of 4 and 39 minutes per orbit; in addition, the transit times of the inner body display an alternating variation of smaller amplitude. These signatures are characteristic of gravitational interaction of two planets near a 2:1 orbital resonance. Six radial-velocity observations show that these two planets are the most massive objects orbiting close to the star and substantially improve the estimates of their masses. After removing the signal of the two confirmed giant planets, we identified an additional transiting super-Earth-size planet candidate with a period of 1.6 days.