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Space / Cosmology
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Pickled in Brine
Mars may once have been awash in water but the water was very salty
Oct. 26,
2009 -- Andrew H. Knoll, Ph.D., Fisher Professor of Natural History and professor of earth and planetary sciences at Harvard University, will discuss the evidence for life on Mars at 7 p.m. Oct. 30 in Room 300, Laboratory Sciences Building, on the Danforth Campus of Washington University in St. Louis.
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Cloudy with a chance of pebble showers
Simulation suggests rocky exoplanet has bizarre atmosphere
Sept. 29,
2009 --
Intrigued by the discovery last February of Corot-7b, a rocky exoplanet, Washington University in St. Louis scientists set out to investigate its atmosphere the only way so-far possible: mathematically and by simulation. Tidally locked with its star and orbiting very close to it, the planet is hot enough to melt rock on its star-facing side. Its atmosphere consists of the components of silicate rocks in gaseous form and, the simulation suggests, periodically rains pebbles or grains of sand onto the molten surface below.
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O'Ceallaigh Medal winner
Cowsik receives award for 'outstanding contributions to cosmic ray physics'
Sept. 14,
2009 --
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| Cowsik |
Ramanath Cowsik, Ph.D., professor of physics and director of the McDonnell Center for the Space Sciences in Arts & Sciences at Washington University in St. Louis, received the 2009 O'Ceallaigh Medal for his "outstanding contributions to cosmic ray physics." Cowsik, whose scientific contributions span over four decades, received the award during the opening ceremony of the 31st biennial International Cosmic Ray Conference, held in Lodz, Poland.
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'Holy grail for icy volcanism'
Saturnian moon shows evidence of ammonia
July 24,
2009 --
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| NASA/JPL/Space Science Institute |
| Saturn's moon Enceladus, seen by the Cassini spacecraft. |
Data collected during two close flybys of Saturn's moon Enceladus by NASA's Cassini spacecraft add more fuel to the fire about the Saturnian ice world containing sub-surface liquid water, according to a report in the July 23 issue of the journal Nature that is co-authored by a planetary researcher from Washington University in St. Louis.
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Extremely high energy
Pinpointing origin of gamma rays from a supermassive black hole
July 2,
2009 --
An international collaboration of 390 scientists reports the discovery of an outburst of very-high-energy gamma radiation from the giant radio galaxy Messier 87 (M 87), accompanied by a strong rise of the radio flux measured from the direct vicinity of its supermassive black hole. The combined results give first experimental evidence that particles are accelerated to extremely high energies in the immediate vicinity of a supermassive black hole and then emit the observed gamma rays. The gamma rays have energies a trillion times higher than the energy of visible light. Washington University in St. Louis physicists helped coordinate this cooperative project, the results of which appear in the July 2 Science Express, the advance online publication of the journal Science.
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Transformed speculative field into 'precision science'
World-renowned cosmologist to discuss the Big Bang in McDonnell Center lecture series
April 2,
2009 --
P. James E. Peebles, Ph.D., one of the world's foremost theoretical cosmologists who played a central role in understanding the evolution and structure of the universe, will deliver two talks April 15-16 as part of the McDonnell Distinguished Lecture Series, sponsored by Washington University's McDonnell Center for the Space Sciences.
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Can't hold a Super-TIGER down
Origin of galactic cosmic rays focus of NASA grant
Feb. 23,
2009 --
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| Courtesy photo |
| W. Robert Binns and TIGER prelaunch in Antarctica |
Astrophysicists at Washington University in St. Louis have received a five-year, $3,225,740 grant from the National Aeronautics and Space Administration to design and build Super-TIGER — a Trans-Iron Galactic Element Recorder — and then fly it aboard a high-altitude balloon over Antarctica to collect rare atomic particles called galactic cosmic rays. Super-TIGER's first flight in search of the origin of cosmic rays is planned for December 2012.
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New twist on 40-year-old discovery
A Newtonian system that mimics the baldness of rotating black holes
Feb. 23,
2009 --
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| Photo by Don Davis |
| Rotating black hole: one of nature's most perfect objects |
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A physicist at Washington University in St. Louis has found a new twist on a 40-year-old discovery — "the Carter constant" — about the motion of particles in the external field of a rotating black hole. Clifford M. Will, Ph.D., the James S. McDonnell Professor of Physics in Arts & Sciences, has shown that even in Newton's gravity, arrangements of masses exist whose gravitational field also admits a Carter-like constant of motion. The finding has implications for gravitational-wave astronomy, he says.
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Bringing Mars to life
Ray Arvidson to deliver inaugural Robert M. Walker Distinguished Lecture
Oct. 20,
2008 -- Raymond E. Arvidson, Ph.D., the James S. McDonnell Distinguished University Professor at Washington University, will deliver the inaugural Robert M. Walker Distinguished Lecture at 7 p.m. Oct. 30 in Room 100, Brown Hall, on the university's Danforth Campus. Arvidson, who has played key roles in NASA's missions to Mars, including the current Phoenix Mars Mission, will discuss "Mars: Environments, Habitability, and Life" during the free lecture that is open to the public.
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That's just super!
Researchers reveal superfluid-superconductor relationship
Aug. 5,
2008 --
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| Image courtesy of NASA |
| A WUSTL researcher and his collaborator have drawn the first detailed picture of the way a superfluid influences the behavior of a superconductor. This could shed light on the behavior of neutron stars, above. |
Scientists have studied superconductors and superfluids for decades. Now, researchers at Washington University in St. Louis have drawn the first detailed picture of the way a superfluid influences the behavior of a superconductor. In addition to describing previously unknown superconductor behavior, these calculations could change scientists' understanding of the motion of neutron stars.
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