Science & Technology

Kevin D. McKeegan, a scientist whose analyses of meteorites and other extraterrestrial materials from space has improved understanding of the processes and chronology of the early solar system, will deliver a free public talk in November as part of the Robert M. Walker Distinguished Lecture, sponsored by the McDonnell Center for the Space Sciences.

Strange ‘eggshell planets’ are among the rich variety of exoplanets possible, according to a study from Washington University in St. Louis. These rocky worlds have an ultra-thin outer brittle layer and little to no topography. Such worlds are unlikely to have plate tectonics, raising questions as to their habitability. The research led by planetary geologist Paul Byrne in Arts & Sciences offers concrete ways that other scientists could identify such eggshell planets.

Nan Liu, research assistant professor of physics in Arts & Sciences, is first author of a new study in The Astrophysical Journal Letters that analyzes a diverse set of presolar grains with the goal of realizing their true stellar origins.

A lunar probe launched by the Chinese space agency recently brought back the first fresh samples of rock and debris from the moon in more than 40 years. Now an international team of scientists, including Bradley Jolliff in Arts & Sciences, has determined the age of these moon rocks at close to 1.97 billion years old.

Researchers led by physicist Henric Krawczynski in Arts & Sciences completed initial construction on XL-Calibur, a new balloon-borne telescope designed to measure the polarization of high-energy X-rays from black holes, neutron stars and other exotic celestial objects.

Scientists in the Department of Earth and Planetary Sciences in Arts & Sciences will continue to archive and distribute digital data related to the study of the surfaces and interiors of terrestrial planetary bodies under a five-year cooperative agreement with NASA.

Research led by Kun Wang in Arts & Sciences suggests a fundamental reason why Mars has no liquid water on its surface today: it may be just too small.

Kenneth F. Kelton, the Arthur Holly Compton Professor of Physics in Arts & Sciences, won a five-year grant from NASA to study fundamental fluid processes in the microgravity environment of the International Space Station.

Planetary scientist Sarah Stewart Johnson, AB ’01, wants to find the limits of life and broaden our world.

Researchers examine a 4.6 billion- year-old rock to better understand the solar system’s beginning, and a modern mystery.