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Study of planetary disks around T Tauri stars
If David Weintraub and Jeff Bary are right, there may be a lot more planets circling stars like the Sun than current models of star and planet formation predict.
The associate professor of astronomy at Vanderbilt and his graduate student are taking a critical look at T Tauri stars. These are stellar adolescents, less than 10 million years old, which are destined to become stars similar to the Sun as they age.
Classical T Taur
Wildland fires are taking tons of carbon out of storage and feeding it into the atmosphere as carbon dioxide, a primary greenhouse gas. Drought makes things worse, stunting tree growth and turning forests into tinderboxes. And when human activity disturbs the environment, the ability of forests to store carbon is further diminished.
These are some of the preliminary findings from computer modeling studies of the Colorado wildfires of 2002 being presented in San Francisco, December 6–10, at t
An innovative engineering project could lead to fewer night-time accidents on badly lit roads.
It is developing a revolutionary way of assessing whether roads are equipped with appropriate levels of streetlighting.
The new assessment system is quicker, cheaper and more comprehensive than methods previously used. It can also help local authorities avoid the cost of unnecessary streetlight replacement.
The project is being carried out by engineers at Queen’s Univers
Nearly a month has passed since the wounded tanker Prestige spilled thousands of tons of heavy oil into the Atlantic and fouled dozens of Spanish beaches. But anxious residents of coastal Spain and Portugal remain on high alert – wondering where and when the noxious crude will wash ashore next.
In recent years, tanker accidents have ruined fisheries and tourist beaches from Alaska to France. But do oil spills always have to end in catastrophe? Perhaps the most vulnerable beaches and coastal
An especially cold winter in Europe, lots of snow in Scandinavia or lots of rain in the Mediterranean are all symptoms of what meteorologists call the North Atlantic Oscillation, but a group of Penn State researchers has gone beyond the symptoms to try to decipher the dynamics of this atmospheric pattern.
“Some scientists argue that the impact of the NAO on global climate is comparable to El Nino,” says Dr. Sukyoung Lee, associate professor of meteorology. “However, most of the scientific co
A greater number of large “planetary sized waves” in the atmosphere that move from the lower atmosphere into the upper atmosphere were responsible for the smaller Antarctic ozone hole this fall, according to NASA researchers. The September 2002 ozone hole was half the size it was in 2000. However, scientists say that these large-scale weather patterns in the Earth’s atmosphere are not an indication that the ozone layer is recovering.
Paul Newman, a lead researcher on ozone at NASA’