Expanding the X-ray view of the universe

Expanding the X-ray view of the universe

X-ray telescopes observe the most extreme and hottest objects in the universe. Physicists in Arts & Sciences at Washington University in St. Louis are playing key roles in the first dedicated X-ray polarimetry missions, including one that launched this month.
McDonnell Center lecture on sampling the solar system

McDonnell Center lecture on sampling the solar system

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.
Tread lightly: ‘Eggshell planets’ possible around other stars

Tread lightly: ‘Eggshell planets’ possible around other stars

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.
Chang’e-5 samples reveal key age of moon rocks

Chang’e-5 samples reveal key age of moon rocks

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.
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